摘要
采用高效液相色谱(HPLC)和电感耦合等离子体质谱(ICP-MS)联用技术建立了三价铬Cr(Ⅲ)和六价铬Cr(Ⅵ)两种铬形态的分析方法.通过对流动相的组成、浓度、pH值等色谱条件的优化以及雾化气、等离子体气、冷却气、碰撞气流量等质谱条件的优化,最后使用20mm.mol-1的乙酸铵和2mm.mol-1乙二胺四乙酸(EDTA)溶液作为流动相,并用四丁基氢氧化铵(TBAH)调节pH值(pH=7.5),成功分离了Cr(Ⅲ)、Cr(Ⅵ)两种铬化合物,两者的检出限均达到1.0μg.L-1.用该方法对环境水样进行Cr(Ⅲ)和Cr(Ⅵ)测定,加标回收率为85.0%～101%.
A high performance liquid chromatography and inductively coupled plasma mass spectrometric method are presented for analyzing 2 chromium speciations, including Cr（Ⅲ） and Cr（Ⅵ）. In this paper, with optimization of chromatographic conditions and optimization of mass spectrometry conditions, the condition for obtaining a set of optimal parameters is established. The process involovs using 20 mm.mol-1 ammonium acetate and 2.0mm.mol-1 ethylene diaminetetraacetic acid （EDTA） solutions as the mobile phase, and using tetrabutylammonium hydroxide （TBAH） to adjust the pH value （pH=7.5）, by which chromium compounds of Cr（Ⅲ）, Cr（Ⅵ） are successdfully separated. The recovery ratio of standard addition in water sample is 85.0%- 101%.
出处
《宁波大学学报（理工版）》
CAS
2012年第3期13-16,共4页
Journal of Ningbo University：Natural Science and Engineering Edition
基金
浙江省分析测试基金(2009F70069)
浙江省水产技术推广总站站长基金(TGZ200801)
