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GB/T 15072.12-2008: Test method of precious metal alloys -- Determination of nickel contents for silver alloys -- Hydrogen peroxide spectrophotometry
Status: Valid GB/T 15072.12: Evolution and historical versions
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| GB/T 15072.12-2008 | English | 139 |
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Test method of precious metal alloys -- Determination of nickel contents for silver alloys -- Hydrogen peroxide spectrophotometry
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GB/T 15072.12-2008
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| GB/T 15072.12-1994 | English | 199 |
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Silver alloys-Determination of vanadium content
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GB/T 15072.12-1994
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PDF similar to GB/T 15072.12-2008
Basic data | Standard ID | GB/T 15072.12-2008 (GB/T15072.12-2008) | | Description (Translated English) | Test method of precious metal alloys -- Determination of nickel contents for silver alloys -- Hydrogen peroxide spectrophotometry | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H68 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 6,658 | | Date of Issue | 2008-03-31 | | Date of Implementation | 2008-09-01 | | Older Standard (superseded by this standard) | GB/T 15072.12-1994 | | Quoted Standard | YS/T 371 | | Regulation (derived from) | National Standard Approval Announcement 2008 No.5 (Total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 silver vanadium content. This section applies to the determination of vanadium content in AuCuV. Measuring range (mass fraction): 0. 1% to 0. 4%. | GB/T 15072.12-2008: Test method of precious metal alloys -- Determination of nickel contents for silver alloys -- Hydrogen peroxide spectrophotometry
---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 nickel contents for silver alloys. Hydrogen peroxide spectrophotometry
ICS 77.120.99
H68
National Standards of People's Republic of China
Replacing GB/T 15072.12-1994
Precious metal alloys -
Determination of amount of silver vanadium alloy
Hydrogen peroxide spectrophotometry
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 12.
This Part replaces GB/T 15072.12-1994 "precious metals and their alloys - Silver alloys - Determination of vanadium content."
This section compared with the GB/T 15072.12-1994, have the following main changes.
--- Standard name by the GB/T 15072.12-1994 "precious metals and their alloys - Silver alloys - Determination of vanadium content."
Changed to "precious metal alloys - Determination of silver alloy vanadium content of hydrogen peroxide spectrophotometry";
--- The new standard requires the preparation of solution preparation, concentration and other representation has been revised;
--- Original standard range AgCuV10-0.2 modify this standard applicable to the determination of vanadium content in AgCuV; the measuring range (mass
Score). 0.1% - 0.4%;
--- 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. Jinya Qiu, Wu Ruilin, An Zhongqing, Giulia.
This part of the standard replaces the previous editions are.
--- GB/T 15072.12-1994.
Precious metal alloys -
Determination of amount of silver vanadium alloy
Hydrogen peroxide spectrophotometry
1 Scope
This section specifies the determination method silver vanadium content.
This section applies to the determination of vanadium content in AgCuV in. Measurement range (mass fraction). 0.1% to 0.4%.
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 in nitric acid at 2.5mol/L solution of nitric acid, vanadium (V) with hydrogen peroxide complexes formed orange, spectrophotometer
Measured at a wavelength of 450nm absorbance to determine the content of the alloy of vanadium.
4 Reagents and materials
Unless otherwise noted, reagents and vessels shall comply with YS/T 371 standard.
Nitrate 4.1 (ρ1.42g/mL).
4.2 nitrate solution. low-temperature heating nitric acid (4.1), out of the colorless solution was diluted to NO2, cooled with an equal volume of water.
4.3 hydrogen peroxide solution (1 + 9).
4.4 V standard stock solution. Weigh 0.500g metal vanadium (vanadium content of not less than 99.99%), accurate to 0.0001g, placed
300mL beaker, add 30mL of nitric acid (4.1), cover the surface of the pan, over low heat until completely dissolved, the solution was yellow (if greenish low
Pentavalent vanadium solution can be heated concentrated nitric acid was added to the yellow solution was expensive). Remove, cool down, rinse the beaker and watch glass wall, into
500mL volumetric flask, dilute to the mark with water. Mix well. 1mL solution containing 1mg vanadium.
4.5 Vanadium standard solution. Pipette 5.00mL standard stock solutions of vanadium in a 50mL volumetric flask, dilute to volume with water. Mix well. This solution
1mL solution containing 100μg vanadium.
This standard reagents and water must not contain chlorine ions.
5 Instruments
Visible spectrophotometer.
6 Sample
Samples with acetone to remove oil, washed with water, dried and processed into chips, and mix.
7 Procedure
7.1 Sample
Weigh 0.1g sample, accurate to 0.0001g.
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