Spectrophotometric determination of copper in alloys using naphthazarin

被引：41

作者：

Chaisuksant, R ^{[1
]}

Palkawong-na-ayuthaya, W

Grudpan, K

机构：

[1] Silpakorn Univ, Fac Sci, Dept Chem, Nakorn Pathom 73000, Thailand

[2] Chiang Mai Univ, Fac Sci, Dept Chem, Chiang Mai 50200, Thailand

来源：

TALANTA | 2000年 / 53卷 / 03期

关键词：

naphthazarin; copper determination; alloy; spectrophotometry;

D O I：

10.1016/S0039-9140(00)00534-8

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Naphthazarin (5,8-dihydroxy-1,4-naphthoquinone: Naph) is proposed as a chromogenic reagent for the spectrophotometric determination of copper(II). The polynuclear complex has a mole ratio of Cu:Naph = 4:6 in a 50% v/v ethanol/water medium containing 0.1 M ammonium acetate and 1.5% (w/v) sodium dodecyl sulfate. The copper naphthazarin complex shows an absorption maximum at 330 nm with a molar absorptivity of 1.84 x 10(4) l mol(-1) cm(-1). Beer's law is obeyed up to 4.5 ppm of copper(II). The method was applied for copper determination in alloy samples with satisfactory results. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：579 / 585

页数：7