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Citation: ZHAO Chang-Feng, ZHOU Li-Qin, HUANG Chun-Yu, XIE Hong-Ling, JIANG Zhi-Liang. Resonance Light Scattering Effect of Some Metal-Ammonium Pyrrolidinedithiocarbamate Chelate Complex Particles and Its Application to Determination of Trace Chlorine Dioxide[J]. Chinese Journal of Applied Chemistry, ;2007, 24(5): 551-555. shu

Resonance Light Scattering Effect of Some Metal-Ammonium Pyrrolidinedithiocarbamate Chelate Complex Particles and Its Application to Determination of Trace Chlorine Dioxide

1.
School of Environment and Resource, Guangxi Normal University, Guilin 541004

Corresponding author: JIANG Zhi-Liang,
Received Date: 3 June 2006
Available Online: 28 September 2006
Fund Project: 广西自然科学基金(No.0575042) (No.0575042)

In NH₃-NH₄Cl buffer solutions,the reactions of ammonium pyrrolidinedithiocarbamate with some metal ions such as Cu(Ⅱ),Ag(Ⅰ),Pd(Ⅱ),Ni(Ⅱ) and Co(Ⅱ) form chelate complex particles and yield a liquid-solid surface,which show different colors and resonance light scattering (RLS) effects.The five chelate particle systems,Cu(Ⅱ)-APDC,Ag(Ⅰ)-APDC,Pd(Ⅱ)-APDC,Ni(Ⅱ)-APDC and Co(Ⅱ)-APDC,exhibit resonance scattering peaks at 310 nm,360 nm,360 nm,360 nm and 400 nm,respectively.Under the chosen conditions,there is a good linear relationship between the metal ion concentrations and the RLS intensity.When APDC in (Cu-APDC) was oxidized by ClO₂,the RLS intensity of this system was reduced linearly with its concentration.Based on this fact,a new resonance scattering spectral method is proposed for the determination of 7.56×10^-9~756×10^-9 g/mL ClO₂,with a detection limit of 3.0×10^-9 g/mL ClO₂.Its regress equation is ΔI=87.9 c_Cl+0.55,with a relative coefficient of 0.997 8.It was applied to the analysis of ClO₂ in water samples with a satisfactory result.
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