GB/T 15072.6-2025 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 15072.6-2025	RFQ	ASK	3 days	Methods for chemical analysis of precious metal alloys - Part 6: Determination of iridium content	Valid
GB/T 15072.6-2008	189	Add to Cart	3 days	Test method of precious metal alloys -- Determination of iridium contents for platinum, palladium alloys -- Electricity titration with ferrous sulfate	Valid
GB/T 15072.6-1994	319	Add to Cart	3 days	Platinum, Palladium alloys-Determination of iridium content	Obsolete

Basic data

Standard ID: GB/T 15072.6-2025 (GB/T15072.6-2025)
Description (Translated English): Methods for chemical analysis of precious metal alloys - Part 6: Determination of iridium content
Sector / Industry: National Standard (Recommended)
Date of Implementation: 2026-03-01
Older Standard (superseded by this standard): GB/T 15072.6-2008

GB/T 15072.6-2008: Test method of precious metal alloys -- Determination of iridium contents for platinum, palladium alloys -- Electricity titration with 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 metal alloys. Determination of iridium contents for platinum, palladium alloys. Electricity titration with ferrous sulfate ICS 77.120.99 H68 National Standards of People's Republic of China Replacing GB/T 15072.6-1994 Precious metal alloys - Determination of the amount of iridium, platinum, palladium alloys Current ferrous sulfate 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 19 Sections. 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 6. This Part replaces GB/T 15072.6-1994 "precious metals and their alloys - palladium, iridium, iridium alloys measured quantity." This section compared with the GB/T 15072.6-1994, have the following main changes. --- Standard name by the GB/T 15072.6-1994 "precious metals and their alloys - palladium, iridium alloy iridium content measured Set "to" precious metal alloys - Determination of platinum, palladium, iridium alloy in determining the amount of ferrous sulfate titration current "; --- The new standard requires the preparation of solution preparation, concentration and other representation has been revised; --- The original scope of the standard PtIr10, PtIr17.5, PtIr25, PdIr10, PdIr18 modify this standard applies to PtIr, PdIr, PtIrRu alloys - Determination of iridium content; --- According to GB/T 20001.4-2001 format requirements rewritten. Appendix A of this section is an informative annex 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. Luo Yijiang, Guoqiu Quan, Yang Yuanyuan, Xiang Tao race. This part of the standard replaces the previous editions are. --- GB/T 15072.6-1994. Precious metal alloys - Determination of the amount of iridium, platinum, palladium alloys Current ferrous sulfate titration

1 Scope

This section provides the determination of platinum, palladium, iridium alloy content. This section applies to PtIr, determination PdIr iridium alloy content. Measurement range (mass fraction). 5% to 30%.

2 Normative references

The following documents contain provisions which, through reference in this text, constitute provisions of this part. For dated references, subsequent 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. YS/T 371 chemical analysis of precious metal alloys and general provisions

3 Method summary

Samples with hydrochloric acid - hydrogen peroxide sealed tube chloride dissolved. Palladium-iridium alloy test solution with the active replacement of copper separation of Pd, with hydrochloric acid in acid medium Solution of sodium tetravalent iridium oxide. In hydrochloric acid and sulfuric acid medium with ferrous sulfate standard titration solution titration of iridium (Ⅳ). Indicate the end of the current law. Selected potential To + 0.5V.

4 Reagents and materials

Unless otherwise noted, reagents and vessels shall comply with the provisions of YS/T 371 Part 4. 4.1 active copper powder. Weigh 1.0g of zinc powder in 100mL beaker, add 1mL ~ 2mL water wet. Copper sulfate solution was added 10mL (197g/L), shaking 2min ~ 3min, plus 30mL hydrochloric acid (4.1.5). When the violent reaction was stopped, decantation upper solution, add 40mL Hydrochloric acid (4.1.4) soak overnight. Decantation upper solution, washed with water four times decanted, and the resulting reduction of the activity of copper for a solution to use. 4.2 Hydrogen peroxide (mass fraction 30%). 4.3 hydrochloride (ρ1.19g/mL). 4.4 HCl (1 + 1). 4.5 hydrochloric acid (1 + 11). 4.6 sulfate (1 + 1). 4.7 with saturated sodium chloride solution. 4.8 chlorite solution (100g/L). 4.9 iridium standard solution Weigh 0.2500g cavernous metal iridium powder (iridium content of not less than 99.95%), accurate to 0.00001g, into a special glass Tube, press YS/T 371 Appendix A was dissolved. Solution was transferred to 500mL volumetric flask, add 250mL of hydrochloric acid (4.1.3), cooled to room temperature, Diluted with water to the mark. Mix well. This solution 1mL containing iridium 0.5000mg. 4.10 ferrous sulfate standard titration solution [Ba (FeSO4 · 7H2O) about 0.0011mol/L] 4.10.1 preparation. Weigh 0.318g ferrous sulfate, sulfuric acid dissolved in 1000mL (4 + 96), and mix well. 4.10.2 Calibration. Calibration and measurement sample were parallel. ......

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