Studies on Determination of Ge in Au Alloys by Potassium Iodate Potentiometric Titration Method

ZHU Liya; ZHOU Yu; TAN Yanshan; LIU Wen; LI Yong; HAN Shouli; TAN Wenjin; HE Xiaotan; WU Xilong; XIE Hongchao; CHEN Liangwei

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Studies on Determination of Ge in Au Alloys by Potassium Iodate Potentiometric Titration Method

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The paper presents a new method of determining Ge in gold alloys by potassium iodate potentiometric titration rather than by traditional distillation separation. The influences of conditions such as the reduction acidity, dosage of sodium hypophosphite and reduction time on the determination of Ge were studied. Comparison was made between the influences of end-point indication for potential method and starch method on accruracy and precision of the analysed results, stability and sensitivity of end-point, selectivity of method and so on. The possibility of reaction in an electrochemical way was discussed. Ge in the alloys such as AuGe 12 , AuGeNi 12 2 , AuAgGe 18.8 12.5 and AuAgGeNi 43.8 6 0.2 was measured, respectively, with the relative standard deviation of 0.10%~0.31% and the recoveries of added standard Ge in sample of 99.40%～100.40% when the reduction acidity was 0.40~0.80 mol/L HCl and 3.3 mol/L H 3 PO 4, 15 g sodium hypophosphite and reduction time 40 min. The new method presented is high accuracy and precision in results, good stability and sensibility in end point, easy operation and strong selectivity of determination. When it is applied to analyse actual samples, satisfactory results are achieved.

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来源
《贵金属》 |2012年第A01期|P.298-304|共7页
作者
ZHU Liya; ZHOU Yu; TAN Yanshan; LIU Wen; LI Yong; HAN Shouli; TAN Wenjin; HE Xiaotan; WU Xilong; XIE Hongchao; CHEN Liangwei;
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作者单位

^pKey;

Laboratory;

of;

Advanced;

Technologies;

for;

Comprehensive;

Utilization;

of;

Platinum;

Metals,;

Sino-Platinum;

Metals;

Resources;

（Yimen）;

Co.;

Ltd.,Kunming;

650106,;

China;

^pCopper;

Co.;

Ltd.,;

Dali;

675600,Yunnan,;

China;

^pof;

Materials;

Science;

and;

Engineering,;

Kunming;

University;

of;

Science;

and;

Technology,;

Kunming;

650093,;

China;

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原文格式 PDF
正文语种 CHI
中图分类容量分析（滴定分析法）;
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Studies on Determination of Ge in Au Alloys by Potassium Iodate Potentiometric Titration Method

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