采用导数分光光度法同时测定混合物中的铍和铝。

Simultaneous determination of beryllium and aluminium in mixtures using derivative spectrophotometry.

作者信息

Agnihotri N K, Singh H B, Sharma R L, Singh V K

机构信息

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

出版信息

Talanta. 1993 Mar;40(3):415-23. doi: 10.1016/0039-9140(93)80254-o.

DOI:10.1016/0039-9140(93)80254-o

PMID:18965646

Abstract

The spectrophotometric determination of beryllium and aluminium with 5,8-dihydroxy-1,4-naphthoquinone in the presence of a non-ionic surfactant is reported. Absorption maxima, molar absorptivity and Sandell's Sensitivity of 1:2 (M:L) beryllium and aluminium complexes are, 585 nm and 598 nm, 1.63 x 10(4) l.mole(-1).cm(-1) and 2.04 x 10(4) l.mole(-1).cm(-1), and 0.55 ng/cm(2) and 1.32 ng/cm(2) respectively. Beer's law is obeyed between 7.20-3.96 x 10(2) ng/ml beryllium and 1.08 x 10(1)-1.08 x 10(3) ng/ml aluminium. A method for simultaneous determination of beryllium and aluminium in their mixture using derivative spectra is described. The range 3.6 x 10(1)-3.6 x 10(2) ng/ml beryllium could be determined in the presence of 1.08 x 10(2)-1.08 x 10(3) ng/ml aluminium, and vice versa.

摘要

报道了在非离子表面活性剂存在下，用5,8 - 二羟基 - 1,4 - 萘醌分光光度法测定铍和铝。1:2（金属离子:配体）铍和铝配合物的最大吸收波长、摩尔吸光系数和桑德尔灵敏度分别为585 nm和598 nm、1.63×10⁴ l·mol⁻¹·cm⁻¹和2.04×10⁴ l·mol⁻¹·cm⁻¹，以及0.55 ng/cm²和1.32 ng/cm²。铍浓度在7.20 - 3.96×10² ng/ml之间以及铝浓度在1.08×10¹ - 1.08×10³ ng/ml之间时符合比尔定律。描述了一种使用导数光谱同时测定混合物中铍和铝的方法。在1.08×10² - 1.08×10³ ng/ml铝存在下可测定3.6×10¹ - 3.6×10² ng/ml的铍，反之亦然。