用非离子胶束介质中的导数分光光度法测定痕量铍。

Determination of trace amounts of beryllium using derivative spectrophotometry in non-ionic micellar medium.

机构信息

Department of Chemistry, University of Delhi, Delhi 110007, India.

出版信息

Talanta. 1998 Dec;47(5):1287-96. doi: 10.1016/s0039-9140(98)00217-3.

Abstract

A rapid and sensitive method for the trace level determination of beryllium based on the formation of a 1:2 complex (lambda(max) 560 nm) with 1,4-dihydroxy-9,10-anthracenedione in an aqueous medium containing Triton X-100 is reported. Beer's law is followed in the range 3.60-360 ng ml(-1) of Be(II). The molar absorptivity and Sandell's sensitivity are 1.68x10(4) l mol(-1)cm(-1) and 0.54 ng cm(-2), respectively; detection limit is 0.23 ng ml(-1) of Be(II). Analysis of synthetic mixtures of composition similar to that of alloys and spiked samples of distilled water, gave results that are in agreement with their beryllium content.

摘要

本文报道了一种在含有 Triton X-100 的水溶液中，利用 1,4-二羟基-9,10-蒽二酮与铍形成 1:2 络合物（最大吸收波长 560nm），用于痕量铍测定的快速灵敏方法。Be(II)在 3.60-360ngml(-1)范围内服从比尔定律。摩尔吸光系数和桑德尔灵敏度分别为 1.68x10(4)lmol(-1)cm(-1)和 0.54ngcm(-2)；检测限为 0.23ngml(-1)的 Be(II)。对类似合金组成的合成混合物和蒸馏水加标样品的分析结果与铍的含量相符。