Chemical analysis of copper salts manufactured between 1877 and 1995

Química Nova

Afonso, Júlio Carlos¹  Universidade Federal do Rio de Janeiro, Rio de Janeiro¹  Aguiar, Renata de Melo¹  Gomes, Lôla Maria Braga¹ 

关键词: copper salts;    chemical analysis;    quality control.;   

DOI  :  10.1590/S0100-40422004000400027

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Samples of copper compounds covering all of the XXth century and the end of the XIXth century were submitted to classical and instrumental quantitative analysis. The amount of impurities greatly decreased with time, reaching a constant level since the 1960's. The gravimetric method was suitable for the determination of copper although other procedures also gave good or reasonable results. However, for metal contaminants, atomic absorption spectrometry was the best choice because of its lower detection limits, being able to determine several elements in the oldest samples. Ion chromatography detected several anions in copper salts manufactured before the 1950's. An increasing quality of raw materials and a better sensitivity of analytical methods led to quality improvement of copper compounds with time.

【 授权许可】

Unknown