YS/T 1120.3-2016Methods for chemical analysis of gold-tin alloys. Part 3: Determination of iron, copper, silver, lead, palladium, cadmium, zinc content. Inductively coupled plasma atomic emission spectrometry (English PDF)

Foreword

YS/T 1120 "gold and tin alloy chemical analysis method" is divided into the following three parts;

- Part 1. Determination of gold quantity - Fire test method;

- Part 2. Determination of tin content - Fluoride precipitation EDTA complexometric titration;

Part 3. Determination of iron, copper, silver, lead, palladium, cadmium and zinc - Inductively coupled plasma atomic emission spectrometric method.

This section is part 3 of YS/T 1120.

This part is drafted in accordance with the rules given in GB/T 1.1-2009.

This part of the National Nonferrous Metals Standardization Technical Committee (SAC/TC243) proposed and centralized.

This part of the main drafting unit. your research and testing technology (Yunnan) Co., Ltd., your research Platinum Co., Ltd., China Nonferrous Metals Industry Standard Measurement Quality Institute.

This part participates in the drafting unit. Guangzhou Nonferrous Metals Research Institute, Beijing Institute of Nonferrous Metals and Rare Earth Application, Jiangxi Han's Precious Metals Co., Ltd., Fujian Zijin Mining and Metallurgy Testing Technology Co., Ltd., Anhui Tongling colored rare precious metals branch.

This part of the main drafters. He Jiao, Xiang Lei, Fang Haiyan, Li Guangli, Sun Qi, Wang Jin, Wang Fang, Wang Lingfeng, Yu Jinsheng, Gong Changhe, Chen Yan, Yu Fengshan, Sun Baofei, Fan Shuhui, Zhi Fuguo.

Metallographic analysis of gold alloy Part 3. determination of iron, copper, silver, lead, palladium, cadmium and zinc Inductively coupled plasma atomic emission spectrometry

1 Scope

This part of YS/T 1120 specifies the determination of iron, copper, silver, lead, palladium, cadmium and zinc in gold and tin alloys.

This part is applicable to the determination of iron, copper, silver, lead, palladium, cadmium and zinc in gold and tin alloy. The measurement range is shown in Table 1.

Table 1 Measurement range

Element determination range /% element determination range /% Iron 0.001 ~ 0.1 Copper 0.001 ~ 0.1 Silver 0.001 to 0.1 Lead 0.001 ~ 0.1 Palladium 0.001 to 0.1 Cadmium 0.001 ~ 0.1 Zinc 0.001 to 0.1 - -

2 Method summary

The samples were determined by hydrochloric acid, nitric acid, and inductively coupled plasma atomic emission spectrometry. The contents of iron, copper, silver, lead, palladium, cadmium and zinc were calculated.

Volume fraction.

3 Reagents and materials

The laboratory uses water as a water.

3.1 nitric acid (rho1.42g/mL), excellent grade pure.

3.2 hydrochloric acid (rho1.19g/mL), excellent grade pure.

3.3 Hydrochloric acid (1 4).

3.4 iron standard storage solution. Weigh 0.1000g metal iron powder (mass fraction >= 99.99%), placed in 100mL quartz beaker, add 3mL hydrochloric acid (3.2), dissolved in low temperature heating completely, into the 100mL volumetric flask, add 10mL hydrochloric acid (3.2), diluted with water to the mark. mix uniform. This solution contains 1 mL of 1.0 mg of iron.

3.5 copper standard storage solution. Weigh 0.1000g metal copper (mass fraction >= 99.99%), placed in 100mL quartz beaker, add 2mL nitric acid (3.1), dissolved in low temperature heating completely, into the 100mL volumetric flask, add 10mL hydrochloric acid (3.2), diluted with water to the mark.

Mix well. This solution contains 1 mL of 1.0 mg of copper.

3.6 silver standard storage solution. Weigh 0.1000g metal silver (mass fraction >= 99.99%), placed in 100mL quartz beaker, add 2mL nitric acid (3.1), dissolved in low temperature heating completely, into the 100mL volumetric flask, add 70mL hydrochloric acid (3.2), diluted with water to the mark.

Mix well. This solution contains 1 mL of 1.0 mg of silver.

3.7 lead standard storage solution. Weigh 0.1000g metal lead (mass fraction >= 99.99%), placed in 100mL quartz beaker, add 3mL nitric acid (3.1), dissolved in low temperature heating completely, into the 100mL volumetric flask, add 10mL hydrochloric acid (3.2), diluted with water to the mark.