双水相萃取光度法测定铍  

Extraction-Spectrophotometric Determination of Beryllium in Dual-Aquatic Phase

作　　者：卓馨[1] 蔡红[1] 石影[2] 

机构地区：[1]宿州学院光电化学研究室,安徽宿州234000 [2]淮北煤炭师范学院化学系,安徽淮北235000

出　　处：《稀有金属》2006年第4期567-569,共3页Chinese Journal of Rare Metals

基　　金：安徽省教育厅自然科学研究计划项目(2001Kj245zc)资助

摘　　要：研究了邻苯二酚紫（PV）作为萃取剂和显色剂在聚乙二醇-2000（PEG）-Na2SO4-PV体系中非有机溶剂萃取光度法测定铍。将PV-Be（Ⅱ）配合物从pH=3．5的溶液中萃取到PEG相，其最大吸收波长位于591nm，e=1．25×10^5。Be（Ⅱ）的线性范围为0．0～2．5μg·ml^-1，Be（Ⅱ）与PV的配合比为1：2。将所建立的高灵敏度测定Be（Ⅱ）的方法用于铜合金样品分析，准确度较高。In the system of polyethylene glycol （PEG）- Na2SO4-catechol violet （PV）, the extraction-spectrop hotometric determination of beryllium by using catechol violet （PV） as extractant and color agent with non-organic solvents was studied. The complex was extracted by PEG phase from the water solution of pH = 3.5 （HAc-NaAc）. The maximum absowtion of the complex is at 591 nm and the molar absorptivity （ε）1.25 × 10^5, Beer＇s law is obeyed in the range 0 - 2.5 μg·ml^-1. The beriylium and catechol violet form a stable complex with a molar ratio of 1 ： 2. The proposed method was applied to the determination of beryllium in bronze with satisfactory result.

关 键 词：铍 邻苯二酚紫 萃取光度法 非有机溶剂 聚乙二醇 

分 类 号：O652.62[理学—分析化学]