SN/T 1789-2006 English PDF

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SN/T 1789-2006: Determination of gold and silver contents of blister copper. Fire assay gravimetric method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
SN/T 1789-2006	229	Add to Cart	3 days	Determination of gold and silver contents of blister copper. Fire assay gravimetric method	Valid

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Basic data

Standard ID: SN/T 1789-2006 (SN/T1789-2006)
Description (Translated English): Determination of gold and silver contents of blister copper. Fire assay gravimetric method
Sector / Industry: Commodity Inspection Standard (Recommended)
Classification of Chinese Standard: H62
Classification of International Standard: 77.120.30
Word Count Estimation: 7,750
Date of Issue: 2006-04-25
Date of Implementation: 2006-11-15
Quoted Standard: YS/T 70
Regulation (derived from): Industry Standard Notice 2006 No. 7 (No. 79 overall)
Issuing agency(ies): General Administration of Customs
Summary: This standard specifies the fire assay gravimetric determination of the amount of gold and silver in blister method. This standard applies to blister copper gold and silver determination. Gold measuring range: �� 0. 5g/t, silver measuring range: �� 20g/t.

SN/T 1789-2006: Determination of gold and silver contents of blister copper. Fire assay gravimetric method

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Determination of gold and silver contents of blister copper.Fire assay gravimetric method Book of the People's Republic of China Entry and Exit Inspection and Quarantine Determination of gold and silver in blister copper Released on.2006-04-25 Implementation of.2006-11-15 People's Republic The General Administration of Quality Supervision, Inspection and Quarantine issued

Foreword

Appendix A of this standard is an informative annex. This standard is proposed and managed by the National Certification and Accreditation Administration. This standard was drafted. Anhui Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China. The main drafters of this standard. Sun Zhian, Li Dejun, Lu Xiaobin, Ma Hongyan, Ye Xiangguang, Li Chao. This standard is the first industry standard for entry-exit inspection and quarantine. Determination of gold and silver in blister copper

1 Scope

This standard specifies the method for determining the amount of gold and silver in blister copper by the fire test weight method. This standard applies to the determination of gold and silver in blister copper. The measurement range of gold. ≥0.5g/t; the measurement range of silver. ≥20g/t.

2 Normative references

The terms in the following documents become the terms of this standard by reference to this standard. All dated references, followed by all Modifications (not including errata content) or revisions do not apply to this standard, however, parties to agreements based on this standard are encouraged to study Is it possible to use the latest version of these files? For undated references, the latest edition applies to this standard. YS/T 70 blister copper

3 Method summary

The sample is melted by ingredients and melted at a high temperature to obtain an appropriate amount of lead buckle. The lead buckle is blown by ash, and the amount of gold and silver is determined by a gravimetric method. Use ash dish, slag The fusion method is corrected.

4 reagents

Analytically pure reagents and distilled water or water of corresponding purity were used in the analysis unless otherwise stated. 4.1 Sodium carbonate, industrially pure, powdered. 4.2 Lead oxide, industrially pure, powdery (containing gold ≤ 0.5μg/g; containing silver ≤ 5.0μg/g). 4.3 Starch, industrial pure, powdered. 4.4 Silica, industrially pure, powdered. 4.5 Sodium chloride, industrially pure, powdered. 4.6 Sterling silver with silver ≥99.99%. 4.7 Lead foil, thickness 0.1mm~0.15mm, excluding gold and silver. 4.8 Acetic acid. 4.9 Nitric acid, excellent grade. 4.10 acetic acid (1+3). 4.11 Nitric acid (1+7).

5 Instruments and equipment

5.1 Ultra-micro balance. 0.001mg. 5.2 Test furnace. 5.3 High temperature electric hob. 5.4 Electric heating plate. 5.5 Grey dish machine. 5.6 Sample mill. 5.7 Clay 坩埚. 120mm high, 90mm upper outer diameter, 50mm lower outer diameter. 5.8 Porcelain crucible. low, 30mL. 5.9 Gray dish. 30mm high, 35mm upper diameter, 40mm lower outer diameter, 1 part of bovine bone powder and 3 parts of silicate water above 425# ......

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