GOST 16274.5-77

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-162745-77.pdf (107.18 KiB)
ГОСТ 16274.5-77

GOST 16274.5−77 Bismuth. Method for determination of silver content (with Amendments No. 1, 2, 3)

GOST 16274.5−77

Group B59

STATE STANDARD OF THE USSR

BISMUTH

Method for determination of silver content

Bismuth.
Method for determination of silver content

AXTU 1709

Date of introduction 1978−01−01

INFORMATION DATA

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

DEVELOPERS

PS Poklonsky, F. M. Manji, G. V. Khabarova

2. APPROVED AND promulgated by the DECREE of the State Committee of standards of Ministerial Council of the USSR from 25.01.77 N 172

3. The frequency of inspection 5 years

4. REPLACE GOST 16274.5−70

5. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS


The designation of the reference document referenced	The partition number
GOST 1277−75	Sec. 2
GOST 1770−74	Sec. 2
GOST 4461−77	Sec. 2
GOST 7851−74	Sec. 2
GOST 10928−90	Sec. 2
GOST 16274.0−77	Sec. 1
GOST 27067−86	Sec. 2
THAT 6−09−5359−88	Sec. 2

6. Resolution of the state standard from 30.07.92 N 836 removed the limitation of the validity period

7. REPRINT (July 1997) with Amendments No. 1, 2, 3, approved in January 1983, June 1987, July 1992 (IUS 5−83, 11−87, 10−92)

This standard applies to metallic bismuth brands Vi1 and Vi2 and sets rodanistye volumetric method for determination of silver (with silver content from 0.1 to 0.5%).

The method is based on titration of silver with a solution of ammonium thiocyanate in acidic medium in the presence of bismuth. As an indicator used salesonline alum.

1. GENERAL REQUIREMENTS

General requirements for method of analysis according to GOST 16274.0.

2. GLASSWARE, REAGENTS AND SOLUTIONS

Volumetric flasks with a capacity of 1000 cm ГОСТ 16274.5-77 Висмут. Метод определения содержания серебра (с Изменениями N 1, 2, 3) according to GOST 1770.

Microburette with a capacity of 2 cmin the NTD.

A pipette with a capacity of 25 cmin the NTD.

Heat-resistant conical flask with a capacity of 250 cm ГОСТ 16274.5-77 Висмут. Метод определения содержания серебра (с Изменениями N 1, 2, 3) according to GOST 7851.

Distillation apparatus for producing the double-distilled water.

Nitric acid according to GOST 4461 chlorine-free and 1% solution.

Alum salesonline on the other 6−09−5359, 10% solution in 1% nitric acid solution.

Bismuth metal brand Ви0 according to GOST 10928.

Silver nitrate according to GOST 1277.

A standard solution of silver, prepared as follows: 15,7467 g of silver nitrate is placed in a measuring flask with volume capacity of 1000 cm ГОСТ 16274.5-77 Висмут. Метод определения содержания серебра (с Изменениями N 1, 2, 3) , dissolved in bidistilled water, made up to the mark with water and mix.

1 cm ГОСТ 16274.5-77 Висмут. Метод определения содержания серебра (с Изменениями N 1, 2, 3) of the solution contains 0.01 g of silver.

Bidistilled water.

Ammonium radamisty according to GOST 27067, solution with molar concentration 0,01 mol/DM.

The titer of the solution set in the following way: in six conical flasks with a capacity of 250 cm ГОСТ 16274.5-77 Висмут. Метод определения содержания серебра (с Изменениями N 1, 2, 3) taken at 25 cmstandard silver solution, is added to 2.5 g of bismuth brand Ви0 and dissolved in 50 cmof concentrated nitric acid, priliva small portions. The dissolution of lead first without heating and then heated to remove oxides of nitrogen. To the solution flow 100cm ГОСТ 16274.5-77 Висмут. Метод определения содержания серебра (с Изменениями N 1, 2, 3) double-distilled water, cooled and titrated with a solution Rodenstock ammonium with molar concentration of 0,01 mol/DMin the presence of 2 cmgentoomaniac alum before the appearance of stable pink color.

The titer of the solution Rodenstock ammonium ( ГОСТ 16274.5-77 Висмут. Метод определения содержания серебра (с Изменениями N 1, 2, 3) ), expressed in g/cmof silver, calculated by the formula

ГОСТ 16274.5-77 Висмут. Метод определения содержания серебра (с Изменениями N 1, 2, 3) ,

where ГОСТ 16274.5-77 Висмут. Метод определения содержания серебра (с Изменениями N 1, 2, 3) — amount of the standard solution taken for titration, cm;

0,01 — concentration of a standard solution of silver, g/cm;

— number of Rodenstock ammonium solution with molar concentration 0,01 mol/DM ГОСТ 16274.5-77 Висмут. Метод определения содержания серебра (с Изменениями N 1, 2, 3) , spent on titration, sm.

(Changed edition, Rev. N 2).

3. ANALYSIS

A sample of bismuth with a mass of 10.0 g is placed in a conical flask with a capacity of 250 cm ГОСТ 16274.5-77 Висмут. Метод определения содержания серебра (с Изменениями N 1, 2, 3) and dissolved in 50 cmof concentrated nitric acid, priliva small portions. Dissolution of the sample is carried out at first without heating and then with heating to the disappearance of the oxides of nitrogen.

To the solution flow 100cm ГОСТ 16274.5-77 Висмут. Метод определения содержания серебра (с Изменениями N 1, 2, 3) double-distilled water and, after cooling, titrated with a solution Rodenstock ammonium with molar concentration of 0,01 mol/DMin the presence of 2.0 cmgentoomaniac alum before the appearance of stable pink color.

(Changed edition, Rev. N 2).

4. PROCESSING OF THE RESULTS

4.1. The silver content in the bismuth ( ГОСТ 16274.5-77 Висмут. Метод определения содержания серебра (с Изменениями N 1, 2, 3) ) in percent is calculated by the formula

ГОСТ 16274.5-77 Висмут. Метод определения содержания серебра (с Изменениями N 1, 2, 3) ,

where ГОСТ 16274.5-77 Висмут. Метод определения содержания серебра (с Изменениями N 1, 2, 3) the titer of a solution of ammonium thiocyanate, expressed in grams of silver per milliliter of solution;

— the amount of a solution of ammonium thiocyanate consumed for titration, cm ГОСТ 16274.5-77 Висмут. Метод определения содержания серебра (с Изменениями N 1, 2, 3) ;

— hanging,

4.2. The maximum discrepancy between the results of three parallel measurements ( ГОСТ 16274.5-77 Висмут. Метод определения содержания серебра (с Изменениями N 1, 2, 3) ) and the results of two tests () at a confidence probability of 0.95, should not exceed the values given in the table.


Mass fraction of silver, %	The discrepancy between the results of three parallel definitions %	The discrepancy between the results of two tests, %
0,100	0,017	0,023
0,20	0,03	0,05
0,30	0,05	0,07
0,50	0,06	0,08

Permitted discrepancies for the intermediate mass fraction calculated using linear interpolation or according to the formulas:

ГОСТ 16274.5-77 Висмут. Метод определения содержания серебра (с Изменениями N 1, 2, 3) for the range of mass fraction from 0.1 to 0.3%;

for a mass fraction of more than 0.3%,

where is the arithmetic mean of results of three parallel measurements;

ГОСТ 16274.5-77 Висмут. Метод определения содержания серебра (с Изменениями N 1, 2, 3) — the arithmetic mean of the results of the two tests.

(Changed edition, Rev. N 3).