摘要
本文以二苯卡巴肼（ＤＰＣＩ）和十二烷基硫酸钠（ＳＬＳ）为浮选剂研究了分离浓缩Ｃｒ（Ⅵ）的最佳条件，建立了水中痕量络的形态分析方法。该方法简单、快速，检测限０．０３μｇ·Ｌ（－１），变异系数小于１％。２００ｍＬ水样中合ＮＯ３５０，Ｎａ＋、Ｍｇ（２＋）４０，Ｃｌ－２８，Ｋ＋、Ｃａ（２＋）２０，ＳＯ４２－１０，ＣＯ３９，Ａ１（３＋）、Ｃｏ（２＋）、Ｎｉ（２＋）＋５，Ｍｎ（２＋）、Ｐｂ（２＋）２．５，Ｆｅ（３＋）０．２ｍｇ不影响测定。方法用于水中痕量Ｃｒ（Ⅵ）和Ｃｒ（Ⅲ）的测定，获得满意结果。
The optimum conditions of the separation and preconcentration of Cr(Ⅵ) by use of ion flotation in the presence of diphenylcarbazide(DPCI)and sodium lauryl sulfate (SLS) were investigated.The specistion analysis method of trace chromium in water was established.The method is simple, rapid and the detection limit is 0.03μg. L(-1). The coefficients of variation for seven measurements of 0.5 and 1.oμg.L-1 Cr(Ⅵ) in water were 1. 9 and 3.4 % respectively.No interference was observed in the presence of NO3 50, Na+, Mg2+ 40,Cl-28,K+,Ca2+20,SO4-10,CO3-9, Al3+, Ni2+, Co2+ 5, Mn2+, Pb2+, 2. 5, Fe3+ 0.2 ms.Trace Cr(Ⅵ)and Cr(Ⅲ) in water have been determined with satisfactory results.
出处
《分析科学学报》
CAS
CSCD
1995年第4期32-35,共4页
Journal of Analytical Science
关键词
离子浮选
原子吸收光谱法
铬
水样
形态分析
Ion flotation,Atomic absorption spectrometry, Chrominm, Speciation
