引用本文:
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
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
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
Determination of sulfur anions by ion chromatography-postcolumn derivation and UV detection
摘要:
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%.
English
Determination of sulfur anions by ion chromatography-postcolumn derivation and UV detection
Abstract:
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%.
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