GB/T 15072.1: Evolution and historical versions
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| GB/T 15072.1-2025 | English | RFQ |
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Methods for chemical analysis of precious metal alloys - Part 1: Determination of gold content
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GB/T 15072.1-2025
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| GB/T 15072.1-2008 | English | 128 |
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Test method of precious alloys -- Determination of gold content for gold, platinum and palladium alloys -- Potentiometric titration using ferrous sulfate
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GB/T 15072.1-2008
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| GB/T 15072.1-1994 | English | 199 |
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Gold, palladium alloys. Determination of gold content
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GB/T 15072.1-1994
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Basic data | Standard ID | GB/T 15072.1-2025 (GB/T15072.1-2025) | | Description (Translated English) | Methods for chemical analysis of precious metal alloys - Part 1: Determination of gold content | | Sector / Industry | National Standard (Recommended) | | Date of Implementation | 2026-03-01 | | Older Standard (superseded by this standard) | GB/T 15072.1-2008 | GB/T 15072.1-2008: Test method of precious alloys -- Determination of gold content for gold, platinum and palladium alloys -- Potentiometric titration using ferrous sulfate
---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.
Test method of precious alloys. Determination of gold content for gold, platinum and palladium alloys. Potentiometric titration using ferrous sulfate
ICS 77.120.99
H68
National Standards of People's Republic of China
Replacing GB/T 15072.1-1994
Precious metal alloys -
Determination of Au, Pt, Pd alloy gold content
Potentiometric titration with ferrous sulfate
Posted 2008-03-31
2008-09-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard is GB/T 15072-1994 "precious metals and their alloys -" (all parts) the integration of amendments into
Part 19.
Determination --- GB/T 15072.1-2008 Methods for chemical analysis of precious metal alloys of gold, platinum, palladium, gold alloy amount of ferrous sulfate
Potentiometric titration;
--- GB/T 15072.2-2008 Methods for chemical analysis of precious metal alloys silver alloys Determination of silver content of sodium chloride potential drop
Titration;
--- GB/T 15072.3-2008 Methods for chemical analysis of precious metal alloys of gold, platinum, palladium, platinum alloys determining the amount of potassium permanganate
Current titration;
--- GB /15072.4-2008 Methods for chemical analysis of precious metal alloys of palladium, silver-palladium alloy determining the amount of T-dimethyl glyoxal
Gravimetric method;
--- GB/T 15072.5-2008 Methods for chemical analysis of precious metal alloys of gold, measuring the potential of potassium iodide palladium alloy of silver content drops
Titration;
--- GB/T 15072.6-2008 precious metal alloys - Determination of platinum, palladium, iridium alloy in determining the amount of ferrous sulfate Current
titration;
--- GB/T 15072.7-2008 precious metal alloys - Gold alloys chromium and iron content - Inductively coupled plasma
Plasma atomic emission spectrometry;
--- GB/T 15072.8-2008 precious metal alloys - gold, palladium, silver and copper alloys - Determination of the amount of precipitation thiourea
EDTA complexometric back titration;
--- GB/T 15072.9-2008 precious metal alloys - Gold alloys - Determination of the amount of indium by EDTA back drop
Titration;
--- GB/T 15072.10-2008 precious metal alloys - Gold alloys - Determination of nickel by EDTA back drop
Titration;
--- GB/T 15072.11-2008 precious metal alloys - gold alloy of gadolinium and beryllium content - Inductively coupled plasma
Plasma atomic emission spectrometry;
--- GB T 15072.12-2008 precious metal alloys - Silver alloys - Determination of vanadium content/hydrogen peroxide spectrophotometer
Law degree;
--- GB/T 15072.13-2008 precious metal alloys - Tin in silver, cerium and lanthanum content - Inductively coupled
Plasma atomic emission spectrometry;
--- GB/T 15072.14-2008 precious metal alloys - silver alloy of aluminum and nickel content - Inductively coupled plasma
Plasma atomic emission spectrometry;
--- GB T 15072.15-2008 precious metal alloys - gold, silver, palladium alloy of nickel, zinc and manganese contents /
Inductively coupled plasma atomic emission spectrometry;
--- GB/T 15072.16-2008 precious metal alloys - gold alloy of copper and manganese content - Inductively coupled plasma
Plasma atomic emission spectrometry;
--- GB/T 15072.17-2008 precious metal alloys - Determination of tungsten content of a platinum alloy of tungsten trioxide weight
Method;
--- GB/T 15072.18-2008 precious metal alloys - Gold alloys of zirconium and gallium content - Inductively coupled plasma
Plasma atomic emission spectrometry;
--- GB/T 15072.19-2008 precious metal alloys - silver vanadium alloys and magnesium content - Inductively coupled plasma
Plasma atomic emission spectrometry.
This section GB/T 15072-2008 Part 1.
This Part replaces GB/T 15072.1-1994 "precious metals and their alloys - gold, palladium alloys Determination of gold content."
This section compared with the GB/T 15072.1-1994, have the following main changes.
--- Standard name by the GB/T 15072.1-1994 "precious metals and their alloys - Determination of gold and palladium alloy measured amount of gold
Amendments (not including errata content) or revisions do not apply to this section, however, encourage the parties to this part of the research agreement
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this section.
GB/T 9725 General Chemical Reagents potentiometric titration
371 precious metal alloys - General rules and regulations YS/T
3 Method summary
Mixed acid gold alloy, palladium alloy sample decomposition with hydrochloric acid and nitric acid; platinum alloy containing rhodium, iridium and gold alloy sample with hydrochloric acid, peroxide
Hydrogen closed decomposition. Rhodium, iridium, tin and high amounts of platinum, palladium, cuprous chloride reduction with separation payments. In sulfuric acid and phosphoric acid with ferrous sulfate
Standard Solution titration Au (Ⅲ) to Au (0), indicating the end of potential method to determine the gold content.
4 Reagents and materials
Unless otherwise indicated, all reagents and materials in this section shall comply with the provisions of YS/T 371's.
4.1 hydrochloride (ρ1.19g/mL).
Nitrate 4.2 (ρ1.42g/mL).
4.3 sulfate (ρ1.84g/mL).
4.4 phosphoric acid (ρ1.70g/mL).
4.5 Hydrogen peroxide (30% mass fraction).
4.6 potassium permanganate solution (20g/L).
4.7 sulfuric acid solution (4 + 96).
4.8 hydrochloric acid and nitric acid mixture. 3 per unit volume of hydrochloric acid (4.1) and 1 unit volume of nitric acid (4.2) are mixed. The time is now equipped with.
4.9 hydrochloric acid and nitric acid mixture. 30 unit volume of hydrochloric acid (4.1) and 1 unit volume of nitric acid (4.2) are mixed. The time is now equipped with.
4.10 sulfuric acid and phosphoric acid mixed.200mL amount of sulfuric acid (4.3) in porcelain evaporating dish and heated to take white smoke, stirring solution of permanganate
Potassium solution (4.6) to the red does not fade, remove, cool. An equal volume of phosphoric acid (4.4) and mix. Into 500mL glass bottle.
4.11 hydrochloric acid solution (1 + 9).
4.12 sodium chloride solution (250g/L).
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