2003•Metallurgical AnalysisRequires access

Determination of zinc in aluminium alloy by spectrophotometry

Shen Liang-feng

Abstract

The color reaction of zincⅡwith 2-[(5-bromo-2-pyridyl)-azo]-5-diethylaminophenol(5-Br-PADAP) was investigated in the presence of surfactant such as cetyltrimethylammonium bromide(CTMAB),Tween-20,Triton X-100 in the ammonia-ammonium chloride buffer solution(pH8 5) It was found that CTMAB had the best enhanced sensitivity effect. Based on this a spectrophotometric method for determination of trace zinc was proposed The red complex of ZnⅡ with 5-Br-PADAP has a maximum absorptivity at 555nm The apparent molar absorptivity is 1 37×10 5L·mol -1 ·cm -1 Beer’s law is obeyed in the range of 0-15μg/25mL for zinc This method has been applied to the determination of trace zinc in aluminium alloy with satisfactory results

About this research paper

What this paper is about

Why it matters

A significance statement is not available in the OpenAlex record.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

Key concepts: Molar absorptivity, Zinc, Chemistry, Spectrophotometry, Aluminium, Buffer solution, Bromide, Color reaction