用火试金灰吹法分析测定金条中纯金的标准试验方法

详细信息   

• 标准号：ASTM E1335-2008
• 发布日期：2008
• 英文题名：Standard Test Methods for Determination of Gold in Bullion by Fire Assay Cupellation Analysis
• 英文主题词：fire assay ; gold and silver bullion ; gold content ; fire assay ; gold and silver bullion ; gold content ; fire assay ; gold and silver bullion ; gold content ; Bullion ; Cupellation method ; Gold and silver bullion ; Gold content ; Gold metals/alloys ; Silver bullion ; Total gold plus silver
• 标准状态：现行
• 发布单位：US-ASTM
• 国际标准分类号：77.120.99 (Other non-ferrous metals and their alloys)
• 载体形态：6P.;A4
• 中国标准分类号：H15
• 国别：美国材料与试验协会

文摘

These test methods are intended for the determination of the gold content of gold and silver bullion. It is assumed that all who use these test methods are trained assayers capable of performing common fire assay procedures skillfully and safely. It is expected that work will be performed in a properly equipped laboratory.

1.1 These test methods cover cupellation analysis of bullion having chemical compositions within the following limits:

class="rules">

Element	Concentration Range, %
center" valign="top">
Gold	0.5 to 4.0 and 20.0 to 99.8
Silver	1.0 to 99.5
Total gold plus silver	75.0 to 100.0

1.2 These test methods appear in the following order:

class="rules">

	center" valign="top"> Sections
	center" valign="top">
20.0 % class=''unicode''>x2013; 99.0 % gold	center" valign="top">10-17
0.5 % class=''unicode''>x2013; 4.0 % gold	center" valign="top">18-23
98.9 % class=''unicode''>x2013; 99.8 % gold	center" valign="top">24-30

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.4 class="italic">This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. class="med">For specific safety hazards, see Section 8. cope>

10.1 This test method covers cupellation analysis of gold in bullion containing 20.0 % to 99.0 % gold and 1.0 % to 80.0 % silver.

cope> cope>

18.1 This test method covers the determination of gold in bullion estimated to contain from 0.5 % to 4.0 % gold and 75.0 % to 99.5 % silver.

cope> cope>

24.1 This test method covers the cupellation analysis of gold in grade 99.5 refined gold.

cope>