引用本文:
Mei Lan Chen, Yun Chang Fan, Chang An Li, Dong Fei, Yan Zhu. Determination of toluene diisocyanate in synthetic-rubber track by ion chromatography with ultraviolet detection after alkaline suppressor[J]. Chinese Chemical Letters,
2009, 20(2): 207-209.
doi:
10.1016/j.cclet.2008.10.036
Citation: Mei Lan Chen, Yun Chang Fan, Chang An Li, Dong Fei, Yan Zhu. Determination of toluene diisocyanate in synthetic-rubber track by ion chromatography with ultraviolet detection after alkaline suppressor[J]. Chinese Chemical Letters, 2009, 20(2): 207-209. doi: 10.1016/j.cclet.2008.10.036
Citation: Mei Lan Chen, Yun Chang Fan, Chang An Li, Dong Fei, Yan Zhu. Determination of toluene diisocyanate in synthetic-rubber track by ion chromatography with ultraviolet detection after alkaline suppressor[J]. Chinese Chemical Letters, 2009, 20(2): 207-209. doi: 10.1016/j.cclet.2008.10.036
Determination of toluene diisocyanate in synthetic-rubber track by ion chromatography with ultraviolet detection after alkaline suppressor
摘要:
In the present work, a novel analytical method was proposed for the determination of toluene diisocyanate (TDI) in syntheticrubber track by ion chromatography (IC) coupled with an ultraviolet detector setting at 212 nm. TDI can be hydrolyzed to toluene diamine (TDA) which can be separated by cation-exchange IC easily. The optimum IC separation was performed on an IonPac CS12A column (150 mm×4.0 mm) using 20 mmol L-1 sodium sulfate, 10 mmol L-1 sulfuric acid and 10% acetonitrile as eluent.It was found that a higher signal response of TDA could be obtained under alkaline condition. A suppressor was used to change the acidic eluent into alkaline one. 0.8 mol L-1 potassium hydroxide was chosen as the optimum regeneration eluent. With the added suppressor and regenerant, signal response was magnified by about 16 times and lower limit of detection (LOD, 0.13μg L-1) was obtained. Within-day relative standard deviation (R.S.D.) was less than 3.6%. The recoveries of TDI spiked in synthetic-rubber track samples were 96.4-110.6%.
English
Determination of toluene diisocyanate in synthetic-rubber track by ion chromatography with ultraviolet detection after alkaline suppressor
Abstract:
In the present work, a novel analytical method was proposed for the determination of toluene diisocyanate (TDI) in syntheticrubber track by ion chromatography (IC) coupled with an ultraviolet detector setting at 212 nm. TDI can be hydrolyzed to toluene diamine (TDA) which can be separated by cation-exchange IC easily. The optimum IC separation was performed on an IonPac CS12A column (150 mm×4.0 mm) using 20 mmol L-1 sodium sulfate, 10 mmol L-1 sulfuric acid and 10% acetonitrile as eluent.It was found that a higher signal response of TDA could be obtained under alkaline condition. A suppressor was used to change the acidic eluent into alkaline one. 0.8 mol L-1 potassium hydroxide was chosen as the optimum regeneration eluent. With the added suppressor and regenerant, signal response was magnified by about 16 times and lower limit of detection (LOD, 0.13μg L-1) was obtained. Within-day relative standard deviation (R.S.D.) was less than 3.6%. The recoveries of TDI spiked in synthetic-rubber track samples were 96.4-110.6%.
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Key words:
- Ion chromatography(IC)
- / Ultraviolet detection
- / Toluene diisocyanate(TDI)
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