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 shu

Determination of toluene diisocyanate in synthetic-rubber track by ion chromatography with ultraviolet detection after alkaline suppressor

Mei Lan Chen ^a,b, ,
Yun Chang Fan ^b ,
Chang An Li ^c ,
Dong Fei ^d ,
Yan Zhu ^b

a Biology and Environment College of Zhejiang Shuren University, Hangzhou 310015, China;
b Department of Chemistry, Xixi Campus, Zhejiang University, Hangzhou 310028, China;
c School of Economics and Management, Zhejiang University of Science and Technology, Hangzhou 310023, China;
d Department of Material and Chemical Engineering, Guilin University of Technology, Guilin 541004, China

Received Date: 11 June 2008

Fund Project: This research was financially supported by the National Natural Science Foundation of China (No. 20775070) and by Zhejiang Provincial Natural Science Foundation of China (No. Y507252).

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%.
- Ion chromatography(IC),
- Ultraviolet detection,
- Toluene diisocyanate(TDI)
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