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GOST 16321.1-70

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 16321.1−70 Silver-copper alloys. Method for determination of silver content (with Amendments No. 1, 2)


GOST 16321.1−70*

Group B59


STATE STANDARD OF THE USSR

SILVER-COPPER ALLOYS

Method for determination of silver content

Silver-copper alloys. Method for determination of silver content


AXTU 1709

Date of introduction 1972−01−01


Resolution of the Committee of standards, measures and measuring devices under Council of Ministers of the USSR from 26. VIII 1970 N 1328 the date of the entry is set with 01.01.72

Proven in 1985 by the Resolution of Gosstandart from 26.02.85 N 383 the validity extended to 01.01.91**
_______________
** Expiration removed by Protocol No. 5−94 of the Interstate Council for standardization, Metrology and certification (I & C N 11/12, 1994). — Note the manufacturer’s database.

REPLACE GOST 7979−56 in part of sec. II

* REVISED (July 1986) with Amendments No. 1, 2 approved in August 1980, February 1985 (IUS 10−80, 5−85).


This standard applies to silver-copper alloys and sets the potentiometric method for the determination of silver (at a mass fraction of silver from 49.5 to 97.3%).

The method is based on potentiometric titration of silver ion with a sodium chloride solution with the use of automatic titration unit. As the reference electrode used silver chloride electrode, filled with saturated solution of potassium nitrate. The indicator electrode is a silver wire.

(Changed edition, Rev. N 2).

1. GENERAL REQUIREMENTS

1.1. General requirements for method of analysis according to GOST 22864−83.

2. APPARATUS, REAGENTS AND SOLUTIONS


Nitric acid GOST 4461−77 and diluted 1:1.

Silver GOST 6836−80* brands of SR 999,9.
______________
* On the territory of the Russian Federation GOST 6836−2002. — Note the manufacturer’s database.

Laboratory pH-meter-millivoltmeter.

The magnetic stirrer.

Burette with automatic zero setting capacity of 50 cmГОСТ 16321.1-70 Серебряно-медные сплавы. Метод определения содержания серебра (с Изменениями N 1, 2).

The block automatic titration laboratory.

Sodium chloride, 0.1 N. solution; prepared from fixanal 0.1 g·EQ. In the absence of fiksanala dissolved in water 5,85 g of sodium chloride according to GOST 4233−77 and bring the volume to 1 DMГОСТ 16321.1-70 Серебряно-медные сплавы. Метод определения содержания серебра (с Изменениями N 1, 2)with water.

Titer of 0.1 n sodium chloride solution set as follows: a portion of silver is 0.45 g (take three parallel sample) were placed in a glass with a capacity of 250 cmГОСТ 16321.1-70 Серебряно-медные сплавы. Метод определения содержания серебра (с Изменениями N 1, 2), was dissolved with heating in 10 cmГОСТ 16321.1-70 Серебряно-медные сплавы. Метод определения содержания серебра (с Изменениями N 1, 2)of nitric acid, diluted 1:1, heated to remove oxides of nitrogen and dilute with water to 100 cmГОСТ 16321.1-70 Серебряно-медные сплавы. Метод определения содержания серебра (с Изменениями N 1, 2). The solution was titrated as described in sec. 4.

3. PREPARATION FOR ASSAY


A suspension of 0.5 g (take three parallel sample) were placed in a glass with a capacity of 250 cmГОСТ 16321.1-70 Серебряно-медные сплавы. Метод определения содержания серебра (с Изменениями N 1, 2), is dissolved when heated in nitric acid, diluted 1:1. The solution is heated to remove oxides of nitrogen and diluted with water to about 100 cmГОСТ 16321.1-70 Серебряно-медные сплавы. Метод определения содержания серебра (с Изменениями N 1, 2).

(Changed edition, Rev. N 2).

4. ANALYSIS

4.1. Prepared for the analysis of the solution is titrated potentiometric method of 0,1 n solution of sodium chloride to a predetermined potential difference on the block automatic titration.

(Changed edition, Rev. N 1).

5. CALCULATION OF RESULTS OF ANALYSIS

5.1. Mass fraction of silver (ГОСТ 16321.1-70 Серебряно-медные сплавы. Метод определения содержания серебра (с Изменениями N 1, 2)) in percent is calculated by the formula

ГОСТ 16321.1-70 Серебряно-медные сплавы. Метод определения содержания серебра (с Изменениями N 1, 2),


where ГОСТ 16321.1-70 Серебряно-медные сплавы. Метод определения содержания серебра (с Изменениями N 1, 2) — amount of 0.1 n sodium chloride solution consumed for titration, cmГОСТ 16321.1-70 Серебряно-медные сплавы. Метод определения содержания серебра (с Изменениями N 1, 2);

ГОСТ 16321.1-70 Серебряно-медные сплавы. Метод определения содержания серебра (с Изменениями N 1, 2)the titer of a solution of sodium chloride of silver, g/cmГОСТ 16321.1-70 Серебряно-медные сплавы. Метод определения содержания серебра (с Изменениями N 1, 2);

ГОСТ 16321.1-70 Серебряно-медные сплавы. Метод определения содержания серебра (с Изменениями N 1, 2) — hanging,

5.2. Allowable absolute discrepancies in the results of parallel measurements at a confidence level ГОСТ 16321.1-70 Серебряно-медные сплавы. Метод определения содержания серебра (с Изменениями N 1, 2)of 0.95 shall not exceed 0.10% when the mass fraction of silver from 49.5 to 80,0% and 0.15% when the mass fraction of silver of more than 80,0%.

(Changed edition, Rev. N 2).