Analysis of hexavalent chromium in Colla corii asini with on-line sample pretreatment valve-switching ion chromatography

作者：Yang, Yuling; He, Jie; Huang, Zhongping; Zhong, Naifei; Zhu, Zuoyi; Jiang, Renyu; You, Jinghua; Lu, Xiuyang; Zhu, Yan^*; He, Shiwei

来源：Journal of Chromatography A, 2013, 1305: 171-175.

DOI：10.1016/j.chroma.2013.07.027

• Ion chromatography
• On-line pretreatment
• Valve-switching
• Hexavalent chromium (Cr(VI))
• Colla corii asini

An ion chromatography (IC) system with on-line sample pretreatment using valve-switching technique was developed for the determination of hexavalent chromium (Cr(VI)) in Colla corii asini. Colla corii asini is a complicated sample with organics as main matrix. In this work, a polymer-based reversed-phase column was used as a pretreatment column. Via valve-switching technique, sample solution with target ions were eluted from a collection loop to analytical columns, with matrix eliminated on-line. Under the optimized separation conditions, the method showed good linearity (r=0.9998) in the range of 0.004-1.0 mg/L and satisfactory repeatability (RSD <3%, n = 6). The limit of detection (LOD) was 1.4 mu g/L (S/N = 3). The average spiked recoveries of Cr(VI) were 93.4-102.0%. The

• 出版日期2013-8-30
• 单位浙江大学