Citation: Mei Lan Chen, Ming Li Ye, Xue Ling Zeng, Yun Chang Fan, Zhu Yan. Determination of sulfur anions by ion chromatography-postcolumn derivation and UV detection[J]. Chinese Chemical Letters, ;2009, 20(10): 1241-1244. doi: 10.1016/j.cclet.2009.05.003 shu

Determination of sulfur anions by ion chromatography-postcolumn derivation and UV detection

a College of Biology and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310015, China;
b Laboratory of Dionex Corporation, Hangzhou 310028, China;
c Department of Chemistry, Xixi Campus, Zhejiang University, Hangzhou 310028, China

Received Date: 26 February 2009

Fund Project: Zhejiang Qianjiang Project of Science and Technology for Competent People (No.2008R10028) and Zhejiang Provincial Analysis and Testing Foundation of China (No.2007F70061).Zhejiang Provincial Natural Science Foundation of China (No.Y507252)This research was financially supported by National Natural Science Foundation of China (No.20775070)

A novel method for determination of formaldehyde sulfoxylate, sulfite, thiocyanate, and thiosulfate in foodstuffs by ion chromatography separation with postcolumn derivation and UV detection has been developed.All species are separated at Dionex IonPac AG22A and AS22Awith mobile phase of a mixture of 4.5 mmol/L sodium carbonate and 0.8 mmol/L sodium bicarbonate at a flow-rate of 1.0 mL/min.The postcolumn derivation solution was 0.24% iodine in 0.2% phosphate acid and the detection wavelength was set at 288 nm.The detection limits (LOD, signal-to-noise ratio of 3) of formaldehyde sulfoxylate, sulfite,thiocyanate, and thiosulfate were 0.004, 0.006, 0.006, and 0.007 mg/L, respectively.Within-day relative standard deviations (RSD,n=10) of formaldehyde sulfoxylate, sulfite, thiocyanate, and thiosulfate were 3.24%, 3.76%, 2.68%, and 2.07%, respectively.The recoveries of the four anions were in the range of 67.2-116.5%.
- Postcolumn derivation,
- Ion chromatography,
- Sulfur-containing inorganic compounds
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