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2015 Volume 32 Issue 1
2015, 32(1): 1-9
doi: 10.11944/j.issn.1000-0518.2015.01.140106
Abstract:
Molten salts are non-aqueous solvents which are divided into high temperature molten salts,low temperature molten salts and room temperature molten salts. Due to their unique physical and chemical properties,they are used as the reaction and electrolytic media to electrodeposit the active metal coatings that can not be obtained in aqueous solution. In recent years,the research hot spot in the field of molten electrochemistry is that it is applicable in non-aqueous reprocessing by substituting caustic molten salts for electro-deposition and separation of actinide metal ions. This article reviews the properties of actinide elements in electrochemistry,thermodynamics and physics in high temperature molten salt. The recent research progress of room temperature ionic liquids and the latest extraction advancement of actinide elements in room temperature ionic liquids are introduced. The future research trend in molten system is also given.
Molten salts are non-aqueous solvents which are divided into high temperature molten salts,low temperature molten salts and room temperature molten salts. Due to their unique physical and chemical properties,they are used as the reaction and electrolytic media to electrodeposit the active metal coatings that can not be obtained in aqueous solution. In recent years,the research hot spot in the field of molten electrochemistry is that it is applicable in non-aqueous reprocessing by substituting caustic molten salts for electro-deposition and separation of actinide metal ions. This article reviews the properties of actinide elements in electrochemistry,thermodynamics and physics in high temperature molten salt. The recent research progress of room temperature ionic liquids and the latest extraction advancement of actinide elements in room temperature ionic liquids are introduced. The future research trend in molten system is also given.
2015, 32(1): 10-18
doi: 10.11944/j.issn.1000-0518.2015.01.140008
Abstract:
Suzuki coupling reaction is one of the most important methods to construct carbon-carbon bond. Recently,potassium organotrifluoroborate salts have emerged as an attractive and promising alternative to organoboronic acids. This article reviews the research progress in the Suzuki coupling reaction of potassium organotrifluoroborates and gives an outlook on the future research direction.
Suzuki coupling reaction is one of the most important methods to construct carbon-carbon bond. Recently,potassium organotrifluoroborate salts have emerged as an attractive and promising alternative to organoboronic acids. This article reviews the research progress in the Suzuki coupling reaction of potassium organotrifluoroborates and gives an outlook on the future research direction.
2015, 32(1): 19-26
doi: 10.11944/j.issn.1000-0518.2015.01.140078
Abstract:
Due to their high catalytic activity and easily recoverable characters,the magnetic nanoparitcles (MNPs) supported catalysts have received extensive attention in academy as well as industry. Thus,they have been developed into a kind of sustainable nanocatalysts with wide application prospect. In this paper,the recent development in the synthesis and application of MNPs supported palladium catalysts for a variety of C-C coupling reactions such as Suzuki coupling reactions,Heck coupling reactions,etc.,is reviewed. A brief outlook of their developments is also presented.
Due to their high catalytic activity and easily recoverable characters,the magnetic nanoparitcles (MNPs) supported catalysts have received extensive attention in academy as well as industry. Thus,they have been developed into a kind of sustainable nanocatalysts with wide application prospect. In this paper,the recent development in the synthesis and application of MNPs supported palladium catalysts for a variety of C-C coupling reactions such as Suzuki coupling reactions,Heck coupling reactions,etc.,is reviewed. A brief outlook of their developments is also presented.
2015, 32(1): 27-33
doi: 10.11944/j.issn.1000-0518.2015.01.140329
Abstract:
Metal-biomolecule frameworks (MBioFs) are a recently-identified class of porous polymeric materials,consisting of metal ions linked together by biomolecules as organic bridging ligands,and are emerging as a new interdiscipline based on molecular coordination chemistry and biomaterials science. Nucleobases,the key constituents of nucleic acids,have accessible nitrogen and oxygen electron lone pairs, which allows these molecules to act as multidentate organic ligands. In this paper,a series of metalbiomolecule frameworks was successfully synthesized with different nucleobases via a solvothermal system. These MBioFs exhibit brilliant micro-structures which are distinct with each other and dependent on the nucleobase linkers consisting in the frameworks for their different coordination properties. In addition,they are able to adsorb and release organic molecules repeatedly,and can be regarded as the sorbent to treat waste water.
Metal-biomolecule frameworks (MBioFs) are a recently-identified class of porous polymeric materials,consisting of metal ions linked together by biomolecules as organic bridging ligands,and are emerging as a new interdiscipline based on molecular coordination chemistry and biomaterials science. Nucleobases,the key constituents of nucleic acids,have accessible nitrogen and oxygen electron lone pairs, which allows these molecules to act as multidentate organic ligands. In this paper,a series of metalbiomolecule frameworks was successfully synthesized with different nucleobases via a solvothermal system. These MBioFs exhibit brilliant micro-structures which are distinct with each other and dependent on the nucleobase linkers consisting in the frameworks for their different coordination properties. In addition,they are able to adsorb and release organic molecules repeatedly,and can be regarded as the sorbent to treat waste water.
2015, 32(1): 34-42
doi: 10.11944/j.issn.1000-0518.2015.01.140152
Abstract:
In the medium of anhydrous ethanol,the complexes of REL2L'·nH2O(RE:Nd3+,Eu3+,La3+, Sc3+; L:all-trans retinoic acid; L':L-valine acid) were synthesized at 60℃. The compositions of these complexes were tested by means of infrared spectra(IR),ultraviolet spectra(UV),elemental analysis and TG-DTA methods. Meanwhile,the antitumor activity against HepG2,A549 and Hela in vitro growth cells was investigated by MTT test method. The results show that these four synthesized rare earth complexes inhibit the growth of HepG2,A549 and Hela cells in different degrees. The inhibition rates of these complexes are significantly higher than that of rare earth nitrate and ligands. The interaction of REL2L' complex with DNA was studied by fluorescence spectroscopy and viscosity measurement. The results show that the type of interaction is mainly intercalation, which results in the antitumor activity of these complexes. This investigation provides certain ideas and experimental basis for the design of efficient rare earth antitumor drugs with low toxicity.
In the medium of anhydrous ethanol,the complexes of REL2L'·nH2O(RE:Nd3+,Eu3+,La3+, Sc3+; L:all-trans retinoic acid; L':L-valine acid) were synthesized at 60℃. The compositions of these complexes were tested by means of infrared spectra(IR),ultraviolet spectra(UV),elemental analysis and TG-DTA methods. Meanwhile,the antitumor activity against HepG2,A549 and Hela in vitro growth cells was investigated by MTT test method. The results show that these four synthesized rare earth complexes inhibit the growth of HepG2,A549 and Hela cells in different degrees. The inhibition rates of these complexes are significantly higher than that of rare earth nitrate and ligands. The interaction of REL2L' complex with DNA was studied by fluorescence spectroscopy and viscosity measurement. The results show that the type of interaction is mainly intercalation, which results in the antitumor activity of these complexes. This investigation provides certain ideas and experimental basis for the design of efficient rare earth antitumor drugs with low toxicity.
2015, 32(1): 43-52
doi: 10.11944/j.issn.1000-0518.2015.01.140094
Abstract:
Novel azole title compounds with 2',4'-dihalobiphenyl 3a~3k were synthesized via F-C acylation, reduction and substitution reactions starting from 2,4-dihalobiphenyl. The structures of these compounds were confirmed by IR,1H NMR,13C NMR and HMRS spectra. In vitro antifungal activities of title compounds were evaluated. The results of preliminary biological tests show that the title compounds exhibit antifungal activities against to tested pathogenic fungi to some extent. Antifungal activities against to Trichophyton rubrum and Trichophyton mentagrophytes of compounds 3a~3k were equivalent to that of Amphotericin B. Antifungal activities of compounds 3b,3c,3e,3f,3h,3i,3k against to Candiada albicans were higher than that of ketoconazole.
Novel azole title compounds with 2',4'-dihalobiphenyl 3a~3k were synthesized via F-C acylation, reduction and substitution reactions starting from 2,4-dihalobiphenyl. The structures of these compounds were confirmed by IR,1H NMR,13C NMR and HMRS spectra. In vitro antifungal activities of title compounds were evaluated. The results of preliminary biological tests show that the title compounds exhibit antifungal activities against to tested pathogenic fungi to some extent. Antifungal activities against to Trichophyton rubrum and Trichophyton mentagrophytes of compounds 3a~3k were equivalent to that of Amphotericin B. Antifungal activities of compounds 3b,3c,3e,3f,3h,3i,3k against to Candiada albicans were higher than that of ketoconazole.
2015, 32(1): 53-59
doi: 10.11944/j.issn.1000-0518.2015.01.140121
Abstract:
Cu (Ⅱ) meso-tetra (Schiff-base substituted phenyl) porphyrins were synthesized under microwave heating. The experimental results show that the species of substituents on substituted benzaldehyde affect the condensation reaction rates and yields between benzaldehyde and Cu (Ⅱ) meso-5,10,15,20-tetrakis (4-aminophenyl) porphyrin. Cu complex can be formed between the side-chain of salicylaldehyde-Schiff base copper metalloporphyrin and copper ions in alkaline conditions. The conversion and the selectivity of its catalytic oxidation of cyclohexane to cyclohexanone is up to 7.68% and 60.87%,respevtively.
Cu (Ⅱ) meso-tetra (Schiff-base substituted phenyl) porphyrins were synthesized under microwave heating. The experimental results show that the species of substituents on substituted benzaldehyde affect the condensation reaction rates and yields between benzaldehyde and Cu (Ⅱ) meso-5,10,15,20-tetrakis (4-aminophenyl) porphyrin. Cu complex can be formed between the side-chain of salicylaldehyde-Schiff base copper metalloporphyrin and copper ions in alkaline conditions. The conversion and the selectivity of its catalytic oxidation of cyclohexane to cyclohexanone is up to 7.68% and 60.87%,respevtively.
2015, 32(1): 60-63
doi: 10.11944/j.issn.1000-0518.2015.01.140123
Abstract:
Treatment of 9,9-bis (4-hydroxyphenyl) xanthene (1) with nitric acid (69% mass fraction) in acetic anhydride at 15℃ for 1.5 h afforded the intermediate,9,9-bis(3-nitro-4-hydroxyphenyl) xanthene(2) in 88.5% yield. Compound 2 was then reduced to the target,9,9-bis(3-amino-4-hydroxyphenyl) xanthene (3) in 90.8% yield by hydrazine hydrate in the presence of catalytic amount of Pd/C at 70℃ for 10 h in ethanol/dioxane mixed solvents. The two-step overall yield of compound 3 is about 80.4% (based on compound 1). The structures of intermediate 2 and target compound 3 were characterized by NMR,IR and elemental analysis.
Treatment of 9,9-bis (4-hydroxyphenyl) xanthene (1) with nitric acid (69% mass fraction) in acetic anhydride at 15℃ for 1.5 h afforded the intermediate,9,9-bis(3-nitro-4-hydroxyphenyl) xanthene(2) in 88.5% yield. Compound 2 was then reduced to the target,9,9-bis(3-amino-4-hydroxyphenyl) xanthene (3) in 90.8% yield by hydrazine hydrate in the presence of catalytic amount of Pd/C at 70℃ for 10 h in ethanol/dioxane mixed solvents. The two-step overall yield of compound 3 is about 80.4% (based on compound 1). The structures of intermediate 2 and target compound 3 were characterized by NMR,IR and elemental analysis.
2015, 32(1): 64-70
doi: 10.11944/j.issn.1000-0518.2015.01.140117
Abstract:
Two disperse dyes were used to color poly(styrene-co-acrylic acid)[P(St-co-AA)]nanospheres at temperatures below the glass transition temperature of the nanoshperes (110.69℃). Then we studied the effect of temperature(75~95℃) and dye concentration (1%~5%) on the dye content adsorbed on the nanopheres. The results show that the higher the dyeing temperature the more the dye stained on the nanospheres. Increasing the dye concentration of dyeing bath results in higher dye contents on the nanospheres. Higher dye contents gave brighter and deeper colors of the nanospheres. The dye contents of the nanospheres colored with disperse blue 2BLN,which has two amino groups and two hydroxyl groups,are lower than the dye contents of the nanospheres colored with disperse red FB,which has one amino group and one hydroxyl group. After being dyed,the nanospheres become very rough and the size increases 23 nm. The cotton fabrics after cationic modification were dyed with the colored nanospheres. The dyed cotton fabrics obtain deep and bright colors with a very small amount of the colored nanospheres.
Two disperse dyes were used to color poly(styrene-co-acrylic acid)[P(St-co-AA)]nanospheres at temperatures below the glass transition temperature of the nanoshperes (110.69℃). Then we studied the effect of temperature(75~95℃) and dye concentration (1%~5%) on the dye content adsorbed on the nanopheres. The results show that the higher the dyeing temperature the more the dye stained on the nanospheres. Increasing the dye concentration of dyeing bath results in higher dye contents on the nanospheres. Higher dye contents gave brighter and deeper colors of the nanospheres. The dye contents of the nanospheres colored with disperse blue 2BLN,which has two amino groups and two hydroxyl groups,are lower than the dye contents of the nanospheres colored with disperse red FB,which has one amino group and one hydroxyl group. After being dyed,the nanospheres become very rough and the size increases 23 nm. The cotton fabrics after cationic modification were dyed with the colored nanospheres. The dyed cotton fabrics obtain deep and bright colors with a very small amount of the colored nanospheres.
2015, 32(1): 71-75
doi: 10.11944/j.issn.1000-0518.2015.01.140026
Abstract:
To prepare sulfonated polyether ketone/barium titanate (SPAEK/BT) hybrid membrane,the mixture containing BT suspension in cyclohexane obtained under ultrasonic condition and dimethyl sulfoxide solution of SPAEK was casted onto the glass plates. The uniform dispersion of BT in the hybrid membrane was confirmed via SEM. The properties of the corresponding hybrid membranes,such as water uptake,solvent uptake,size change,proton conductivity,methanol permeability,mechanical properties,and stabilities were investigated. Compared to blank membrane,the anti-swelling,thermal stability,and oxidative stability of hybrid membranes are improved respectively. The water stability and mechanical properties are also improved, whereas the proton conductivity of the hybrid membrane is decreased in some extent.
To prepare sulfonated polyether ketone/barium titanate (SPAEK/BT) hybrid membrane,the mixture containing BT suspension in cyclohexane obtained under ultrasonic condition and dimethyl sulfoxide solution of SPAEK was casted onto the glass plates. The uniform dispersion of BT in the hybrid membrane was confirmed via SEM. The properties of the corresponding hybrid membranes,such as water uptake,solvent uptake,size change,proton conductivity,methanol permeability,mechanical properties,and stabilities were investigated. Compared to blank membrane,the anti-swelling,thermal stability,and oxidative stability of hybrid membranes are improved respectively. The water stability and mechanical properties are also improved, whereas the proton conductivity of the hybrid membrane is decreased in some extent.
2015, 32(1): 76-84
doi: 10.11944/j.issn.1000-0518.2015.01.140178
Abstract:
A series of Cu-Zn-Si-Al bifunctional catalysts for the synthesis of dimethyl ether (DME) was prepared by a liquid-phase technology. The catalysts were prepared with low-cost silica sol as the silica source. The addition of silica exhibits a strong promoting effect on the CO conversion and DME selectivity. When n(Si)/n(Al) is 2,the catalyst shows the best catalytic performance. The conversion of CO reaches 58.1% and the selectivity of DME is improved to 80.2%. The catalysts were characterized by FTIR,XRD, TPR,TPD,BET,XPS and TEM. The results show that the addition of silicon components can promote the dispersion of active components on the catalysts and decrease the carbon deposition caused by heat treatment in the liquid phase. In addition, the Si components interact with Al, which significantly improves the performance of the catalyst for methanol dehydration and the selectivity of DME.
A series of Cu-Zn-Si-Al bifunctional catalysts for the synthesis of dimethyl ether (DME) was prepared by a liquid-phase technology. The catalysts were prepared with low-cost silica sol as the silica source. The addition of silica exhibits a strong promoting effect on the CO conversion and DME selectivity. When n(Si)/n(Al) is 2,the catalyst shows the best catalytic performance. The conversion of CO reaches 58.1% and the selectivity of DME is improved to 80.2%. The catalysts were characterized by FTIR,XRD, TPR,TPD,BET,XPS and TEM. The results show that the addition of silicon components can promote the dispersion of active components on the catalysts and decrease the carbon deposition caused by heat treatment in the liquid phase. In addition, the Si components interact with Al, which significantly improves the performance of the catalyst for methanol dehydration and the selectivity of DME.
2015, 32(1): 85-92
doi: 10.11944/j.issn.1000-0518.2015.01.140071
Abstract:
Cyclohexane oxidation is one of the most important industrial reactions. In order to find more efficient and cheap catalysts for this reaction,we studied the catalytic activity of ammonium paramolybdate (APM). By GC analysis,we focus on the effects of the species and the amount of the acids on the reactivity. Compared with nitric acid,lactic acid is more effective for the oxidation of cyclohexanol to cyclohexanone,and thus improve the TON(turn over number) value of the target products from 124 to 161. Furthermore,we propose a possible reaction mechanism of this new way for green oxidation of cyclohexane.
Cyclohexane oxidation is one of the most important industrial reactions. In order to find more efficient and cheap catalysts for this reaction,we studied the catalytic activity of ammonium paramolybdate (APM). By GC analysis,we focus on the effects of the species and the amount of the acids on the reactivity. Compared with nitric acid,lactic acid is more effective for the oxidation of cyclohexanol to cyclohexanone,and thus improve the TON(turn over number) value of the target products from 124 to 161. Furthermore,we propose a possible reaction mechanism of this new way for green oxidation of cyclohexane.
2015, 32(1): 93-98
doi: 10.11944/j.issn.1000-0518.2015.01.140088
Abstract:
The novel dodecyltriethoxysilane(DTES)/graphene oxide(GO) composite film is prepared via onestep electrodeposition onto 430 stainless steels. Raman spectroscopy measurement and scanning electron microscopy (SEM) measurement suggest efficient encapsulation of GO. Both electrochemical impedance spectroscopy measurement and polarization tests show that composite films have effectively improved the corrosion resistance of 430 stainless steel in 3.5% mass fraction of NaCl solution. The excellent corrosion resistance of well-dispersed GO fill the crack of silane matrix,and the corrosion medium encounter a more tortuous path in traversing in silane matrix,resulting in an improved corrosion protection performance of the composite films.
The novel dodecyltriethoxysilane(DTES)/graphene oxide(GO) composite film is prepared via onestep electrodeposition onto 430 stainless steels. Raman spectroscopy measurement and scanning electron microscopy (SEM) measurement suggest efficient encapsulation of GO. Both electrochemical impedance spectroscopy measurement and polarization tests show that composite films have effectively improved the corrosion resistance of 430 stainless steel in 3.5% mass fraction of NaCl solution. The excellent corrosion resistance of well-dispersed GO fill the crack of silane matrix,and the corrosion medium encounter a more tortuous path in traversing in silane matrix,resulting in an improved corrosion protection performance of the composite films.
2015, 32(1): 99-103
doi: 10.11944/j.issn.1000-0518.2015.01.140120
Abstract:
The tribological properties of two kinds of guanidinium ionic liquids with high thermal stability were investigated and compared with alkyl imidazole ionic liquid. The thermal stability of the ionic liquids was evaluated by a thermogravimetric analysis. The images of worn surface are observed under scanning electron microscope(SEM). The X-ray photoelectron spectrometer (XPS) analysis was carried out to explore the lubrication mechanism. The results show that guanidinium ionic liquids are the best lubricant among the tested lubricants for Si3N4/steel contacts. They have the strongest carrying capacity,the lowest friction coefficient and the smallest wear volume. Complex tribochemical reactions occurred and the boundary lubrication films were formed in Si3N4/steel friction pair interface during the sliding process.
The tribological properties of two kinds of guanidinium ionic liquids with high thermal stability were investigated and compared with alkyl imidazole ionic liquid. The thermal stability of the ionic liquids was evaluated by a thermogravimetric analysis. The images of worn surface are observed under scanning electron microscope(SEM). The X-ray photoelectron spectrometer (XPS) analysis was carried out to explore the lubrication mechanism. The results show that guanidinium ionic liquids are the best lubricant among the tested lubricants for Si3N4/steel contacts. They have the strongest carrying capacity,the lowest friction coefficient and the smallest wear volume. Complex tribochemical reactions occurred and the boundary lubrication films were formed in Si3N4/steel friction pair interface during the sliding process.
2015, 32(1): 104-109
doi: 10.11944/j.issn.1000-0518.2015.01.140104
Abstract:
Molecularly imprinted polymer(MIP) was prepared by optimized method using formaldehyde as template molecule,α-methacrylic acid as functional monomer,ethylene glycol dimethacrylate as crosslinking agent in chloroform. The imprinted polymer has the best selective adsorption capacity when the molar ratio of template molecular,functional monomer,crosslinking agent is 1:2:20,the prepolymerization time is 4 h,and the polymerization time is 8 h. When the concentration of formaldehyde solution is 2 mmol/L,the adsorption capacity of MIP reaches 12.40×10-2 mmol/g. The analysis of squid water sample indicated formaldehyde concentration was 5.92 mg/Kg. At the same time,formaldehyde was not detected when the test sample was diluted 100 times,while after enriched by MIP solid-phase extraction (MIPSE) the concentration of formaldehyde was 5.76 mg/Kg. Formaldehyde MIP has high-efficiency in enriching low concentration formaldehyde for sample preparation,and there is no significant difference in the testing results.
Molecularly imprinted polymer(MIP) was prepared by optimized method using formaldehyde as template molecule,α-methacrylic acid as functional monomer,ethylene glycol dimethacrylate as crosslinking agent in chloroform. The imprinted polymer has the best selective adsorption capacity when the molar ratio of template molecular,functional monomer,crosslinking agent is 1:2:20,the prepolymerization time is 4 h,and the polymerization time is 8 h. When the concentration of formaldehyde solution is 2 mmol/L,the adsorption capacity of MIP reaches 12.40×10-2 mmol/g. The analysis of squid water sample indicated formaldehyde concentration was 5.92 mg/Kg. At the same time,formaldehyde was not detected when the test sample was diluted 100 times,while after enriched by MIP solid-phase extraction (MIPSE) the concentration of formaldehyde was 5.76 mg/Kg. Formaldehyde MIP has high-efficiency in enriching low concentration formaldehyde for sample preparation,and there is no significant difference in the testing results.
2015, 32(1): 110-117
doi: 10.11944/j.issn.1000-0518.2015.01.140147
Abstract:
Carboxymethyl-β-cyclodextrin (CM-β-CD) synthesized by SN 2 substitution was employed successfully on the modification of the surface of the Fe3O4 magnetic nanoparticles(MNPs) using a layer-bylayer method. The as-prepared CM-β-CD functionalized magnetic nanocomposites (CM-β-CD-MNPs) were characterized by transmission electron microscopy(TEM),Fourier transform infrared spectroscopy(FTIR) and vibrating sample magnetometer(VAM). The adsorption properties of CM-β-CD-MNPs on rhodamine B(RhB) were investigated. The results show that CM-β-CD-MNPs are nearly spherical,with an average particle diameter of 16 nm,and are superparamagnetic with a relatively high saturation magnetization value of 54 emu/g. Adsorption kinetic coincides with the pseudo-second-order kinetic model and the adsorption equilibrium is reached within 1 h. Adsorption isotherm fits well to Langmuir adsorption model and the maximum adsorption reaches up to 135.1 mg/g.
Carboxymethyl-β-cyclodextrin (CM-β-CD) synthesized by SN 2 substitution was employed successfully on the modification of the surface of the Fe3O4 magnetic nanoparticles(MNPs) using a layer-bylayer method. The as-prepared CM-β-CD functionalized magnetic nanocomposites (CM-β-CD-MNPs) were characterized by transmission electron microscopy(TEM),Fourier transform infrared spectroscopy(FTIR) and vibrating sample magnetometer(VAM). The adsorption properties of CM-β-CD-MNPs on rhodamine B(RhB) were investigated. The results show that CM-β-CD-MNPs are nearly spherical,with an average particle diameter of 16 nm,and are superparamagnetic with a relatively high saturation magnetization value of 54 emu/g. Adsorption kinetic coincides with the pseudo-second-order kinetic model and the adsorption equilibrium is reached within 1 h. Adsorption isotherm fits well to Langmuir adsorption model and the maximum adsorption reaches up to 135.1 mg/g.
2015, 32(1): 118-122
doi: 10.11944/j.issn.1000-0518.2015.01.140100
Abstract:
A fluorescence method for phthalic acid esters determination has been developed based on enhanced fluorescence intensity of phthalic acid esters in concentrated sulfuric acid. The fluorescence intensity of the system has a linear relationship with phthalic acid esters concentration in the range of 5.00~600 μg/L with the detection limit of 0.57 μg/L. The recovery is in the range of 91.6%~105.1%. This method is simple,rapid and sensitive,and has a wide linear range. It has been successfully applied to determine the total phthalic acid esters in plastic cups and polyvinyl chloride pipe with satisfying results.
A fluorescence method for phthalic acid esters determination has been developed based on enhanced fluorescence intensity of phthalic acid esters in concentrated sulfuric acid. The fluorescence intensity of the system has a linear relationship with phthalic acid esters concentration in the range of 5.00~600 μg/L with the detection limit of 0.57 μg/L. The recovery is in the range of 91.6%~105.1%. This method is simple,rapid and sensitive,and has a wide linear range. It has been successfully applied to determine the total phthalic acid esters in plastic cups and polyvinyl chloride pipe with satisfying results.
