The use of 2-2-thiazolylazo-p-cresol to minimize the interference of Ni and Cu for the bismuth determination in alloys by hydride generation atomic absorption spectrometry

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• 作者：Takase ; Iracema ; Luna ; Aderval S. ; de Campos ; Reinaldo Calixto
• 关键词：Bismuth ; Ni and Cu alloy ; masking agent ; Hydride generation atomic absorption spectrometry
• 刊名：Talanta
• 出版年：2003
• 出版时间：December 4, 2003
• 年：2003
• 卷：61
• 期：5
• 页码：597-602
• 全文大小：197 K

文摘

Thiazolylazo p-cresol (TAC) was studied as a masking agent for the determination of Bi in rich Ni and Cu alloys by hydride generation atomic absorption spectrometry (HGAAS). In the presence of TAC, Bi/Ni and Bi/Cu ratios up to 1:160 000 and 1:16 000, respectively, were found to be tolerable. No buffering was necessary once the masking agent was effective even in very acid medium. Limits of detection at the low μg g⁻¹ range were reached and the accuracy of the procedure was confirmed by the good concordance between found and certified values in the analysis of certified reference materials (CRM).