GB/T 15072.3-2025 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 15072.3-2025	RFQ	ASK	3 days	Methods for chemical analysis of precious metal alloys - Part 3: Determination of platinum content	Valid
GB/T 15072.3-2008	189	Add to Cart	3 days	Test method of precious metal alloys -- Determination of platinum content for gold, platinum and palladium alloys -- Electricity titration using potassium permanganate	Valid
GB/T 15072.3-1994	199	Add to Cart	2 days	Gold, platinum and palladium alloys-Determination of platinum content	Obsolete

Basic data

Standard ID: GB/T 15072.3-2025 (GB/T15072.3-2025)
Description (Translated English): Methods for chemical analysis of precious metal alloys - Part 3: Determination of platinum content
Sector / Industry: National Standard (Recommended)
Date of Implementation: 2026-03-01
Older Standard (superseded by this standard): GB/T 15072.3-2008

GB/T 15072.3-2008: Test method of precious metal alloys -- Determination of platinum content for gold, platinum and palladium alloys -- Electricity titration using potassium permanganate

---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 metal alloys. Determination of platinum content for gold, platinum and palladium alloys. Electricity titration using potassium permanganate ICS 77.120.99 H68 National Standards of People's Republic of China Replacing GB/T 15072.3-1994 Precious metal alloys - Determination of Au, Pt, Pd alloy of platinum amount Current potassium permanganate titration 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 3. This Part replaces GB measured/T 15072.3-1994 "precious metals and their alloys - gold, platinum, palladium, alloys of platinum amount set". This section compared with the GB/T 15072.3-1994, have the following main changes. --- Fit the standard name from "chemical analysis of precious metals and their alloys Gold, platinum, palladium alloy of platinum determination" to "Precious Metals Methods for chemical analysis of gold, gold, platinum, palladium and platinum alloys determining the amount of potassium permanganate current titration. " --- Original standard range PtIr10, PtIr17.5, PtIr25, PtW8, PtW8.5, PdAgCuAuPtZn30-14-10-10-1, AuAgPt25-6 modify this standard applies to PtIr, PtW, PdAgCuAuPtZn, AuAgPt, AuCuPtAgZn, Determination of the amount of platinum alloy PtIrRu. --- The new standard requires the preparation of solution preparation, concentration and other representation were revised. --- According to GB/T 20001.4-2001 format requirements rewritten. This part is proposed by the China Nonferrous Metals Industry Association. The non-ferrous metal part by the National Standardization Technical Committee. This section is your research Platinum Ltd. is responsible for drafting. The main drafters of this section. Giulia, Zhao Zhong more, Jinya Qiu, An Zhongqing, Yang Yuanyuan. This part of the standard replaces the previous editions are. --- GB/T 15072.3-1994. Precious metal alloys - Determination of Au, Pt, Pd alloy of platinum amount Current potassium permanganate titration

1 Scope

This section provides the determination of gold, platinum, palladium and platinum content of the alloy. This section applies to PtIr, PtW, PdAgCuAuPtZn, AuAgPt, AuCuPtAgZn, PtIrRu platinum alloy contents. Measurement range (mass fraction). 5% to 95%.

2 Normative references

The following documents contain provisions which, through reference in this text, constitute provisions of this part. For dated references, subsequently Some amendments (not including errata content) or revisions do not apply to this section, however, encourage each agreement under this section Are Prescriptions can use the latest versions of these documents. For undated reference documents, the latest versions apply to this section. 371 precious metal alloys - General rules and regulations YS/T

3 Method summary

Mixed acid gold, palladium and platinum tungsten alloy sample decomposition with hydrochloric acid and nitric acid; platinum-iridium alloy sample with hydrochloric acid, hydrogen peroxide decomposition. in With dilute hydrochloric acid solution of cuprous chloride platinum (Ⅳ) reduction to platinum (Ⅱ), titration solution titrated with standard potassium permanganate. Indicate the end of the current law, the election Given the potential of + 0.65V.

4 Reagents and materials

Unless otherwise indicated, all reagents shall conform YS/T 371 standard. 4.1 potassium permanganate. 4.2 cuprous chloride. 4.3 hydrochloride (ρ1.19g/mL). Nitrate 4.4 (ρ1.42g/mL). 4.5 Hydrogen peroxide (30% volume fraction). 4.6 hydrochloric acid and nitric acid mixture. 3 per unit volume of hydrochloric acid (4.3) and 1 unit volume of nitric acid (4.4) are mixed. The time is now equipped with. 4.7 hydrochloric acid and nitric acid mixture. 30 unit volume of hydrochloric acid (4.3) and 1 unit volume of nitric acid (4.4) are mixed. The time is now equipped with. 4.8 sulfuric acid solution (1 + 3). 4.9 sodium chloride solution (50g/L). 4.10 cuprous chloride solution. Weigh 3.0g of cuprous chloride (4.2), placed in 100mL flask, add 30mL of hydrochloric acid (4.3), dilute with water Explanation to the mark. Mix with a time now equipped. 4.11 platinum standard solution. Weigh 0.23g platinum (mass fraction of not less than 99.99%), accurate to 0.0001g, placed burning 100mL Cup, add 40mL of hydrochloric acid and nitric acid mixture (4.6), cover with a watch glass and heated until completely dissolved, remove. Rinse the beaker and watch glass wall, Add 5mL sodium chloride solution, evaporated to form a wet salt. Adding 3mL (4.3) hydrochloric acid, evaporated to a wet salt form. So repeated three to four times removed. Add 10mL salt Acid (4.3), transferred to 100mL volumetric flask, dilute with water to volume, and mix. This solution 1mL containing 2.3mg of platinum. 4.12 potassium permanganate standard titration solution (0.0044mol/L) 4.12.1 preparation. Weigh 0.7g of potassium permanganate (4.1), dissolved in about 5000mL of water, boil 1.5h, allowed to stand overnight. With a No. 3 glass sand ......

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