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GB/T 15072.17-2008: Test method of precious metal alloys -- Determination of tungsten contents for platinum alloys -- Tungstic acid gravimetry
Status: Valid GB/T 15072.17: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 15072.17-2008 | English | 139 |
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Test method of precious metal alloys -- Determination of tungsten contents for platinum alloys -- Tungstic acid gravimetry
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GB/T 15072.17-2008
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| GB/T 15072.17-1994 | English | 199 |
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Platinum alloys-Determination of tungsten content
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GB/T 15072.17-1994
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Basic data | Standard ID | GB/T 15072.17-2008 (GB/T15072.17-2008) | | Description (Translated English) | Test method of precious metal alloys -- Determination of tungsten contents for platinum alloys -- Tungstic acid gravimetry | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H68 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 6,677 | | Date of Issue | 2008-03-31 | | Date of Implementation | 2008-09-01 | | Older Standard (superseded by this standard) | GB/T 15072.17-1994 | | Quoted Standard | YS/T 371 | | Regulation (derived from) | National Standard Approval Announcement 2008 No.5 (Total No.118) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the determination of platinum alloy tungsten content. This section applies to the determination of tungsten alloy PtW content. Measuring range (mass fraction): 7% to 10%. | GB/T 15072.17-2008: Test method of precious metal alloys -- Determination of tungsten contents for platinum alloys -- Tungstic acid gravimetry
---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 tungsten contents for platinum alloys.Tungstic acid gravimetry
ICS 77.120.99
H68
National Standards of People's Republic of China
Replacing GB/T 15072.17-1994
Precious metal alloys -
Determination of tungsten content of platinum alloys
Tungsten trioxide gravimetric method
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 17.
This Part replaces GB/T 15072.17-1994 "precious metals and their alloys - Determination of platinum alloy of tungsten content."
This section compared with the GB/T 15072.17-1994, have the following main changes.
--- Standard name by the GB/T 15072.17-1994 "precious metals and their alloys - Determination of platinum alloy of tungsten content."
Changed to "precious metal alloys - Determination of tungsten content of a platinum alloy of tungsten trioxide by weight of law";
--- The new standard requires the preparation of solution preparation, concentration and other representation has been revised;
--- Original standard range PtW8, PtW8.5 modify this standard applies to PtW tungsten alloys Determination;
--- 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. Luo Yijiang, Guoqiu Quan, Xiang Tao race, Yang Yuanyuan.
This part of the standard replaces the previous editions are.
--- GB/T 15072.17-1994.
Precious metal alloys -
Determination of tungsten content of platinum alloys
Tungsten trioxide gravimetric method
1 Scope
This section provides the determination of platinum alloy of tungsten content.
This section applies to the determination PtW alloy of tungsten content. Measurement range (mass fraction). 7% to 10%.
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.
371 precious metal alloys - General rules and regulations YS/T
3 Method summary
Sample was dissolved with a mixed acid, tungsten trioxide yellow precipitate, gravimetric method for determination of tungsten content.
4 Reagents and materials
Unless otherwise noted, reagents and vessels shall comply with YS/T 371 standard.
4.1 hydrochloride (ρ1.19g/L).
Nitrate 4.2 (ρ1.42g/L).
4.3 mixed acid. 3 unit volume per unit volume of hydrochloric acid and nitric acid 1 (4.2) is mixed with a time of existing service.
4.4 nitric acid (1 + 9).
4.5 silver nitrate solution (10g/L).
Ammonia 4.6 (1 + 1).
5 Sample
Samples processed into chips, with acetone to remove oil, washed with water, dried, and mix.
Step 6 Analysis
6.1 Sample
Weigh 0.5g sample accurate to 0.00001g.
6.2 Determination of the number of
Two independent measurement averaged.
6.3 blank test
Along with sample blank test.
6.4 Determination
6.4.1 The sample was placed in 250mL beaker, add 20mL ~ 30mL mixed acid, cover with a watch glass, in the low-temperature heating furnace dissolved.
When dissolved, add the mixed acid can be repeated until the observed black particles is completely dissolved. Evaporated to about 10mL, removed, cooled to
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