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GB/T 11066.1-2008 in English

GB/T 11066.1-2008 in English

VALID

Methods for chemical analysis of gold - Determination of gold content - Fire assaying method

  • Issued on:2008-06-09
  • Implemented on:2008-12-01
  • File Format:PDF
  • Delivery:Via email within 1~3 business days
Price(USD): $90.00
$88.00

《GB/T 11066.1-2008金化学分析方法 金量的测定 火试金法》由TC243(全国有色金属标准化技术委员会)归口,TC243SC5(全国有色金属标准化技术委员会贵金属分会)执行,主管部门为中国有色金属工业协会。
GB/T11066《金化学分析方法》分为10个部分,本部分规定了金中金含量的测定方法。本部分适用于金中金寒冷的测定。测定范围:99.50%--99.95%。本部分代替GB/T 11066.1―1989《金化学分析方法 火试金法测定金量》。本部分与GB/T11066.1―1989相比,主要有如下的变动:
―――将灰皿制作材料由“纯骨灰制成”改为“纯骨灰或镁砂制成”;
―――增加了试样条款;
―――将取样量“称取1.00000g试料”更改为“称取0.50 或1.00g试料”,由“每份试料及标样与2.5g纯银”更改为“每份试料及纯金标样加1.25g或2.5g纯银”;
―――将碾片中“由两端向片中线卷成两个相同的圆筒”内容,更改为“将退火后的金银片卷成圆筒状”;
―――第三次分金中增加了“当试料称取量为1.00g时,进行第三次分金”;
―――在“分析结果的计算”条款内重新表述计算公式和结果的单位,并增加了计算结果表示到小数点后的位数内容;
―――用精密度代替允许差;
―――增加了质量保证和控制条款。


1 Scope
This part specifies the methods for the determination of gold content.
This part is applicable to the determination of gold content in gold. The determination range is 99.50% ~ 99.95%.

2 Method Summary

Add adequate amount of silver into the test portion and them wrap it with lead foil and perform cupellation at 920℃ to separate the lead and impurities from the gold and silver and leave the alloy beads of gold and silver in the cupel. The beads are then made into rolls, parted by nitric acid and weighed; calibrate the result with the result of the reference material of pure gold, which has been subjected to the same procedures along with the test portion, and then calculate the gold content of the test portion.

3 Reagents and Materials

Contents
Foreword I
1 Scope
2 Method Summary
3 Reagents and Materials
4 Apparatus
5 Sample
6 Analysis Procedures
7 Calculation of Analysis Results
8 Precision
9 Quality Assurance and Control

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