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GOST 12562.1-82

GOST 33729-2016 GOST 20996.3-2016 GOST 31921-2012 GOST 33730-2016 GOST 12342-2015 GOST 19738-2015 GOST 28595-2015 GOST 28058-2015 GOST 20996.11-2015 GOST 9816.5-2014 GOST 20996.12-2014 GOST 20996.7-2014 GOST P 56306-2014 GOST P 56308-2014 GOST 20996.1-2014 GOST 20996.2-2014 GOST 20996.0-2014 GOST 16273.1-2014 GOST 9816.0-2014 GOST 9816.4-2014 GOST P 56142-2014 STATE STANDARD P 54493-2011 GOST 13498-2010 STATE STANDARD P 54335-2011 GOST 13462-2010 STATE STANDARD P 54313-2011 GOST P 53372-2009 GOST P 53197-2008 GOST P 53196-2008 GOST P 52955-2008 GOST P 50429.9-92 GOST 6836-2002 GOST 6835-2002 GOST 18337-95 GOST 13637.9-93 GOST 13637.8-93 GOST 13637.7-93 GOST 13637.6-93 GOST 13637.5-93 GOST 13637.4-93 GOST 13637.3-93 GOST 13637.2-93 GOST 13637.1-93 GOST 13637.0-93 STATE STANDARD 13099-2006 GOST 13098-2006 GOST 10297-94 GOST 12562.1-82 GOST 12564.2-83 GOST 16321.2-70 GOST 4658-73 GOST 12227.1-76 GOST 16274.0-77 GOST 16274.1-77 GOST 22519.5-77 GOST 22720.4-77 GOST 22519.4-77 GOST 22720.2-77 GOST 22519.6-77 GOST 13462-79 GOST 23862.24-79 GOST 23862.35-79 GOST 23862.15-79 GOST 23862.29-79 GOST 24392-80 GOST 20997.5-81 GOST 24977.1-81 GOST 25278.8-82 GOST 20996.11-82 GOST 25278.5-82 GOST 1367.7-83 GOST 26239.9-84 GOST 26473.1-85 GOST 16273.1-85 GOST 26473.2-85 GOST 26473.6-85 GOST 25278.15-87 GOST 12223.1-76 GOST 12645.7-77 GOST 12645.1-77 GOST 12645.6-77 GOST 22720.3-77 GOST 12645.4-77 GOST 22519.7-77 GOST 22519.2-77 GOST 22519.0-77 GOST 12645.5-77 GOST 22517-77 GOST 12645.2-77 GOST 16274.9-77 GOST 16274.5-77 GOST 22720.0-77 GOST 22519.3-77 GOST 12560.1-78 GOST 12558.1-78 GOST 12561.2-78 GOST 12228.2-78 GOST 18385.4-79 GOST 23862.30-79 GOST 18385.3-79 GOST 23862.6-79 GOST 23862.0-79 GOST 23685-79 GOST 23862.31-79 GOST 23862.18-79 GOST 23862.7-79 GOST 23862.1-79 GOST 23862.20-79 GOST 23862.26-79 GOST 23862.23-79 GOST 23862.33-79 GOST 23862.10-79 GOST 23862.8-79 GOST 23862.2-79 GOST 23862.9-79 GOST 23862.12-79 GOST 23862.13-79 GOST 23862.14-79 GOST 12225-80 GOST 16099-80 GOST 16153-80 GOST 20997.2-81 GOST 20997.3-81 GOST 24977.2-81 GOST 24977.3-81 GOST 20996.4-82 GOST 14338.2-82 GOST 25278.10-82 GOST 20996.7-82 GOST 25278.4-82 GOST 12556.1-82 GOST 14339.1-82 GOST 25278.9-82 GOST 25278.1-82 GOST 20996.9-82 GOST 12554.1-83 GOST 1367.4-83 GOST 12555.1-83 GOST 1367.6-83 GOST 1367.3-83 GOST 1367.9-83 GOST 1367.10-83 GOST 12554.2-83 GOST 26239.4-84 GOST 9816.2-84 GOST 26473.9-85 GOST 26473.0-85 GOST 12645.11-86 GOST 12645.12-86 GOST 8775.3-87 GOST 27973.0-88 GOST 18904.8-89 GOST 18904.6-89 GOST 18385.0-89 GOST 14339.5-91 GOST 14339.3-91 GOST 29103-91 GOST 16321.1-70 GOST 16883.2-71 GOST 16882.1-71 GOST 12223.0-76 GOST 12552.2-77 GOST 12645.3-77 GOST 16274.2-77 GOST 16274.10-77 GOST 12552.1-77 GOST 22720.1-77 GOST 16274.4-77 GOST 16274.7-77 GOST 12228.1-78 GOST 12561.1-78 GOST 12558.2-78 GOST 12224.1-78 GOST 23862.22-79 GOST 23862.21-79 GOST 23687.2-79 GOST 23862.25-79 GOST 23862.19-79 GOST 23862.4-79 GOST 18385.1-79 GOST 23687.1-79 GOST 23862.34-79 GOST 23862.17-79 GOST 23862.27-79 GOST 17614-80 GOST 12340-81 GOST 31291-2005 GOST 20997.1-81 GOST 20997.4-81 GOST 20996.2-82 GOST 12551.2-82 GOST 12559.1-82 GOST 1089-82 GOST 12550.1-82 GOST 20996.5-82 GOST 20996.3-82 GOST 12550.2-82 GOST 20996.8-82 GOST 14338.4-82 GOST 25278.12-82 GOST 25278.11-82 GOST 12551.1-82 GOST 25278.3-82 GOST 20996.6-82 GOST 25278.6-82 GOST 14338.1-82 GOST 14339.4-82 GOST 20996.10-82 GOST 20996.1-82 GOST 12645.9-83 GOST 12563.2-83 GOST 19709.1-83 GOST 1367.11-83 GOST 1367.0-83 GOST 19709.2-83 GOST 12645.0-83 GOST 12555.2-83 GOST 1367.1-83 GOST 9816.3-84 GOST 9816.4-84 GOST 9816.1-84 GOST 9816.0-84 GOST 26468-85 GOST 26473.11-85 GOST 26473.12-85 GOST 26473.5-85 GOST 26473.7-85 GOST 16273.0-85 GOST 26473.3-85 GOST 26473.8-85 GOST 26473.13-85 GOST 25278.13-87 GOST 25278.14-87 GOST 8775.1-87 GOST 25278.17-87 GOST 18904.1-89 GOST 18904.0-89 STATE STANDARD P 51572-2000 GOST 14316-91 GOST P 51704-2001 GOST 16883.1-71 GOST 16882.2-71 GOST 16883.3-71 GOST 8774-75 GOST 12227.0-76 GOST 12797-77 GOST 16274.3-77 GOST 12553.1-77 GOST 12553.2-77 GOST 16274.6-77 GOST 22519.1-77 GOST 16274.8-77 GOST 12560.2-78 GOST 23862.11-79 GOST 23862.36-79 GOST 23862.3-79 GOST 23862.5-79 GOST 18385.2-79 GOST 23862.28-79 GOST 16100-79 GOST 23862.16-79 GOST 23862.32-79 GOST 20997.0-81 GOST 14339.2-82 GOST 12562.2-82 GOST 25278.7-82 GOST 20996.12-82 GOST 12645.8-82 GOST 20996.0-82 GOST 12556.2-82 GOST 25278.2-82 GOST 12564.1-83 GOST 1367.5-83 GOST 25948-83 GOST 1367.8-83 GOST 1367.2-83 GOST 12563.1-83 GOST 9816.5-84 GOST 26473.4-85 GOST 26473.10-85 GOST 12645.10-86 GOST 8775.2-87 GOST 25278.16-87 GOST 8775.0-87 GOST 8775.4-87 GOST 12645.13-87 GOST 27973.3-88 GOST 27973.1-88 GOST 27973.2-88 GOST 18385.6-89 GOST 18385.7-89 GOST 28058-89 GOST 18385.5-89 GOST 10928-90 GOST 14338.3-91 GOST 10298-79 GOST P 51784-2001 GOST 15527-2004 GOST 28595-90 GOST 28353.1-89 GOST 28353.0-89 GOST 28353.2-89 GOST 28353.3-89 STATE STANDARD P 52599-2006

GOST 12562.1−82 Alloys gold-platinum. Method for the determination of gold (Change No. 1)


GOST 12562.1−82

Group B59

INTERSTATE STANDARD

ALLOYS GOLD-PLATINUM

Method for the determination of gold

Alloys gold-platinum. Method for the determination of gold


AXTU 1709

Date of introduction 1984−01−01

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of nonferrous metallurgy of the USSR

DEVELOPERS

A. A. Kuranov, G. S. HAK, N. D. Sergienko, N. With. Stepanov, L. D. Bedrin, T. I. Belyaev, E. E. Safonova

2. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from 30.09.82 N 3864

3. REPLACE GOST 12562−67 in part of sec. 2

4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

   
The designation of the reference document referenced
 Item number
GOST 3118−77
 Sec. 2
GOST 4204−77
 Sec. 2
GOST 4461−77
 Sec. 2
GOST 6552−80
 Sec. 2
GOST 22864−83
 1.1
THAT 6−09−5359−87
 Sec. 2
THAT 25−1819.0021−90
 Sec. 2
THAT 25−1894.003−90
 Sec. 2

5. Limitation of actions taken by Protocol No. 3−93 Interstate Council for standardization, Metrology and certification (ICS 5−6-93)

6. REPRINT (March 1999) with amendment No. 1, approved in June 1988 (IUS 10−88)


This standard sets the coulometric method for the determination of gold in gold-platinum alloys (in mass fraction of gold from 89.6 99.9%).

The method is based on the coulometric titration of gold elektrogeneratory iron with use of the automatic potentiometer. The electrode pair is formed by a platinum electrode and a tungsten electrode.

1. GENERAL REQUIREMENTS

1.1. General requirements for method of analysis according to GOST 22864.

1.2. The numerical value of the result of the analysis must end with a digit of the same rank as that of the normalized indicator grade composition.

(Added, Rev. N 1).

2. APPARATUS, REAGENTS AND SOLUTIONS


pH-meter-millivoltmeter.

The potentiostat P-5827м.

Automatic potentiometer KSP-4.

Magnetic stirrer.

Electric cell: the generator and the auxiliary electrode a platinum wire of 2 mm diameter in the form of a flat spiral, with an area of 30 cmГОСТ 12562.1-82 Сплавы золото-платиновые. Метод определения золота (с Изменением N 1).

Indicator system:

flat platinum electrode EPL-0,2;

the reference electrode is a tungsten wire with a diameter of 3 mm.

Stopwatch on the other 25−1819.0021 TU 25−1894.003.

Orthophosphoric acid according to GOST 6552.

Sulfuric acid according to GOST 4204.

Hydrochloric acid according to GOST 3118 and diluted 1:1.

Nitric acid according to GOST 4461.

Mixture of nitric and hydrochloric acids in a ratio of 1:3.

Alum salesonline on the other 6−09−5359, 0.5 M solution of 141 g of alum is dissolved in 500 cmГОСТ 12562.1-82 Сплавы золото-платиновые. Метод определения золота (с Изменением N 1)of water, poured 105 cmГОСТ 12562.1-82 Сплавы золото-платиновые. Метод определения золота (с Изменением N 1)of sulfuric acid and 250 cm.ГОСТ 12562.1-82 Сплавы золото-платиновые. Метод определения золота (с Изменением N 1)of phosphoric acid, stirred and filtered into a measuring flask with volume capacity of 1000 cmГОСТ 12562.1-82 Сплавы золото-платиновые. Метод определения золота (с Изменением N 1). The solution was topped to the mark with water and mix.

3. PREPARATION FOR ASSAY

3.1. A sample of alloy weighing 0.1 g was dissolved with heating in 10 cmГОСТ 12562.1-82 Сплавы золото-платиновые. Метод определения золота (с Изменением N 1)of a mixture of acids. The solution was transferred to hydrochloric acid by evaporation twice with 10 cmГОСТ 12562.1-82 Сплавы золото-платиновые. Метод определения золота (с Изменением N 1)of hydrochloric acid (1:1), pour 50 cmГОСТ 12562.1-82 Сплавы золото-платиновые. Метод определения золота (с Изменением N 1)of water and 40 cmГОСТ 12562.1-82 Сплавы золото-платиновые. Метод определения золота (с Изменением N 1)of 0.5 M solution gentoomaniac alum.

4. ANALYSIS

4.1. Prepared for analysis hydrochloric acid solution of alloy transferred into the cell lid with fixed electrodes. The cell solution is placed on the magnetic stirrer.

Included in the network power potentiostat, a potentiometer, pH meter, stirrer, and heated them to a working condition.

The switches on the blocks of the potentiostat set in the following provisions:

the initial voltage of the block BZN-1;

divider MA1 unit BVK — 1:1 «on»;

multiplier current unit PCU — 100 mA/V, which corresponds to a current of 100 mA at the output of the potentiostat;

the scale of the instrument BVV-1 — 0,5;

switch «+" «0» — «— 0;

switch ГОСТ 12562.1-82 Сплавы золото-платиновые. Метод определения золота (с Изменением N 1), ГОСТ 12562.1-82 Сплавы золото-платиновые. Метод определения золота (с Изменением N 1).

Tape drive mechanism includes a potentiometer for speed 720 mm/h and a voltage switch unit BVV-1 transferred to the «+". Then a short circuit of the electrode switch unit of the BPU in the position of the «cell on» and at the same time include a stopwatch. The stopwatch is turned off when the minimum value of the potential corresponding to the equivalence point on the titration curve.

(Changed edition, Rev. N 1).

5. PROCESSING OF THE RESULTS

5.1. Mass fraction (goldГОСТ 12562.1-82 Сплавы золото-платиновые. Метод определения золота (с Изменением N 1)) in percent is calculated by the formula

ГОСТ 12562.1-82 Сплавы золото-платиновые. Метод определения золота (с Изменением N 1),


where 0, 067121 is the amount of gold released within 1 s at a current of 100 mA, mg;

ГОСТ 12562.1-82 Сплавы золото-платиновые. Метод определения золота (с Изменением N 1)the time of titration, C;

ГОСТ 12562.1-82 Сплавы золото-платиновые. Метод определения золота (с Изменением N 1) — the weight of the portion of the alloy mg.

5.2. Allowable absolute discrepancies in the results of parallel measurements (ГОСТ 12562.1-82 Сплавы золото-платиновые. Метод определения золота (с Изменением N 1)the rate of convergence) at a confidence probability ГОСТ 12562.1-82 Сплавы золото-платиновые. Метод определения золота (с Изменением N 1)of 0.95, should not exceed 0.20%.

Absolute differences average results of determinations obtained in two different laboratories (ГОСТ 12562.1-82 Сплавы золото-платиновые. Метод определения золота (с Изменением N 1)a measure of reproducibility) shall not exceed 0.30 percent.

5.1, 5.2. (Changed edition, Rev. N 1).

5.3. Control of the correctness of the results of determining the mass fraction of gold is playing its mass fraction in the artificial mixtures the chemical composition close to the composition of the analyzed alloy, drawn through the entire course of the analysis.

The sample analysis results are considered correct if the absolute difference between the maximum and minimum values of the mass fraction of gold in an artificial mixture does not exceed 0,17%.

(Added, Rev. N 1).