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GOST 13637.5-93

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 13637.5−93 Gallium. Method for determination of tin


GOST 13637.5−93

Group B59


INTERSTATE STANDARD

GALLIUM

Method for determination of tin

Gallium.
Method for the determination of tin


AXTU 1709

Date of introduction 1995−01−01


Preface

1. DEVELOPED by the Interstate technical Committee 104 «of the Semiconductor and rare metals products. Especially pure metals», State Institute of rare metals (Giredmet)

INTRODUCED by Gosstandart of Russia

2. ADOPTED by the Interstate Council for standardization, Metrology and certification (Protocol No. 4−93 of 19 October 1993)

The adoption voted:

   
The name of the state The name of the national authority
standardization
The Republic Of Armenia
Armastajad
The Republic Of Belarus
Belstandart
The Republic Of Kazakhstan
Gosstandart Of The Republic Of Kazakhstan
The Republic Of Moldova
Moldovastandart
Russian Federation
Gosstandart Of Russia
Turkmenistan
Turkmenistanand
The Republic Of Uzbekistan
Standards
Ukraine
Gosstandart Of Ukraine

3. Resolution of the Committee of the Russian Federation for standardization, Metrology and certification from 02.06.94 N 160 inter-state standard GOST 13637.5−93 introduced directly as state standard of the Russian Federation from 01.01.95

4. REPLACE GOST 13637.5−77

INFORMATION DATA


REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

   
The designation of the reference document referenced Section number, paragraph
GOST 860−75 Sec. 2
GOST 4658−73 Sec. 2
GOST 6552−80 Sec. 2
GOST 10398−76 Sec. 2
GOST 10652−73 Sec. 2
GOST 11125−84 Sec. 2
GOST 11293−89 Sec. 2
GOST 13637.0−93 Sec. 1
GOST 14261−77 Sec. 2
GOST 18300−87 Sec. 2
GOST 20490−75 Sec. 2
GOST 24104−88 Sec. 2
GOST 24147−80 Sec. 2
GOST 24363−80 Sec. 2
GOST 25086−87 4.3



This standard specifies a method for Stripping alternating-current voltammetry for the determination of tin in Gaul (with mass fraction of tin from 3·10ГОСТ 13637.5-93 Галлий. Метод определения оловаto 1·10ГОСТ 13637.5-93 Галлий. Метод определения олова%).

The method is based on coprecipitation of compounds of tin (IV) phosphate of beryllium in ammonium solution ethylenediaminetetraacetic acid, dissolving the precipitate in hydrochloric acid solution and determination of tin by the method of inversion, alternating-current voltammetry in the presence of gelatin.

1. GENERAL REQUIREMENTS


General requirements for method of analysis and security requirements — according to GOST 13637.0.

2. APPARATUS, REAGENTS AND SOLUTIONS


Polarograph PPT-1, PU-1 or similar with a stationary mercury electrode and electrolytic cell polarography with the outer anode compartment. In the anode compartment is filled, metallic mercury and polarographic background.

Laboratory scales of the 1st class according to GOST 24104*.
_______________
* On the territory of the Russian Federation GOST 24104−2001. — Note the manufacturer’s database.


The roughing pump brand VM-461-M or similar.

Tile laboratory electric power of 400 watts.

Volumetric flasks with a capacity of 50, 100, 200 and 1000 cmГОСТ 13637.5-93 Галлий. Метод определения олова.

Measuring cylinders with capacities of 10, 25 and 50 cmГОСТ 13637.5-93 Галлий. Метод определения олова.

Pipettes with graduations at 0.1; 0.2 and 1 cmГОСТ 13637.5-93 Галлий. Метод определения олова.

Buchner funnel with a diameter of 100 mm.

Quartz test tube with the outlet of the suction capacity of 40 cmГОСТ 13637.5-93 Галлий. Метод определения олова.

The chemical glasses with a capacity of 2000 cmГОСТ 13637.5-93 Галлий. Метод определения олова, 250 cmГОСТ 13637.5-93 Галлий. Метод определения олова.

Watch-glasses with a diameter of 90 mm.

Filter FKP-32-ПОР40.

Sticks to glass.

Bunsen flask with a capacity of 500 cmГОСТ 13637.5-93 Галлий. Метод определения олова.

Dropper with a capacity of 50 cmГОСТ 13637.5-93 Галлий. Метод определения олова.

Hydrochloric acid of high purity according to GOST 14261, distilled and the solutions with concentration of 3 and 1 mol/DMГОСТ 13637.5-93 Галлий. Метод определения олова.

Nitric acid of high purity according to GOST 11125.

Orthophosphoric acid according to GOST 6552, diluted 3:1.

The aqueous ammonia of high purity according to GOST 24147 and diluted 1:1.

Mercury brands r0 according to GOST 4658.

Polarographic background — hydrochloric acid solution with a concentration of 3 mol/DMГОСТ 13637.5-93 Галлий. Метод определения олова.

Aqua Regia a mixture of concentrated nitric and hydrochloric acids in a volume ratio of 1:3.

Potassium permanganate according to GOST 20490.

The technical rectified ethyl alcohol according to GOST 18300 is used when charging the electrodes in accordance with the instructions for polarography.

Potassium hydroxide according to GOST 24363.

Zinc, granulated.

Zinc chloride solution with a mass concentration of 0.5 mol/DMГОСТ 13637.5-93 Галлий. Метод определения олова. 3,2690 g of granulated zinc is placed in a beaker with a capacity of 300 cmГОСТ 13637.5-93 Галлий. Метод определения олова, 20−30 cm, moistened withГОСТ 13637.5-93 Галлий. Метод определения оловаwater and poured in small portions of 25 cmГОСТ 13637.5-93 Галлий. Метод определения оловаof a solution of distilled hydrochloric acid. The solution is evaporated to wet salts, salt dissolved in water, transferred to a volumetric flask with a capacity of 100 cmГОСТ 13637.5-93 Галлий. Метод определения олова, adjusted to the mark with water.

Bidistilled water: distilled water is poured into the flask, quartz distillation apparatus with a capacity of 2 DMГОСТ 13637.5-93 Галлий. Метод определения олова, is poured 1 g of potassium hydroxide and potassium permanganate to intense staining. The solution was heated. Collect the middle fraction of the distillate component ГОСТ 13637.5-93 Галлий. Метод определения оловаof the taken volume of distilled water, the first and third fractions discarded.

Salt is the disodium Ethylenediamine-ГОСТ 13637.5-93 Галлий. Метод определения олова, ГОСТ 13637.5-93 Галлий. Метод определения олова, ГОСТ 13637.5-93 Галлий. Метод определения олова, ГОСТ 13637.5-93 Галлий. Метод определения олова-tetraoxane acid, 2-water (Trilon B) according to GOST 10652.

A solution of ethylenediaminetetraacetic acid: 500 g Trilon B pour 300 cmГОСТ 13637.5-93 Галлий. Метод определения оловаof distilled water in a beaker with a capacity of 2 DMГОСТ 13637.5-93 Галлий. Метод определения оловаand then while stirring with a glass rod, add concentrated ammonia solution until complete dissolution. If the solution is turbid, it is filtered through a thick folded filter in a glass with a capacity of 2 DMГОСТ 13637.5-93 Галлий. Метод определения олова. This is followed by a neutralization with a solution of distilled hydrochloric acid until then, until put in a glass piece of blue indicator paper Congo red red-brown color (pH 3). Emitted while sludge ethylenediaminetetraacetic acid is filtered through a paper filter on a Buechner funnel and washed 5−7 times with cold distilled water.

The washed pellet was transferred to a beaker and dissolved in ammonia (1:1). The molar concentration of a solution of ethylenediaminetetraacetic acid set by GOST 10398 solution of zinc salt.

Beryllium hydroxide.

A solution of beryllium: 36 g hydroxide of beryllium is dissolved in the hydrochloric acid concentration of 3 mol/DMГОСТ 13637.5-93 Галлий. Метод определения олова. The solution was transferred to a volumetric flask with a capacity of 500 cmГОСТ 13637.5-93 Галлий. Метод определения оловаand was adjusted to the mark with hydrochloric acid of concentration 1 mol/DMГОСТ 13637.5-93 Галлий. Метод определения олова.

Gelatin food according to GOST 11293, an aqueous solution concentration of 5 mg/cmГОСТ 13637.5-93 Галлий. Метод определения олова.

Methyl orange aqueous solution with a concentration of 1 mg/cmГОСТ 13637.5-93 Галлий. Метод определения олова.

Phenolphthalein, alcohol solution of concentration 1 mg/cmГОСТ 13637.5-93 Галлий. Метод определения олова.

Eriochrome black.

Tin GOST 860.

A solution of tin (main): 1 g of tin are dissolved in 100 cmГОСТ 13637.5-93 Галлий. Метод определения оловаdistilled hydrochloric acid and 5 cmГОСТ 13637.5-93 Галлий. Метод определения оловаof nitric acid when heated. After the dissolution and disappearance of brown fumes of oxides of nitrogen the solution was cooled, transferred into a measuring flask with volume capacity of 1000 cmГОСТ 13637.5-93 Галлий. Метод определения оловаand bring to mark polarographic background.

1 cmГОСТ 13637.5-93 Галлий. Метод определения оловаof the solution contains 1 mg of tin (IV).

A solution of tin (operating): 10 cmГОСТ 13637.5-93 Галлий. Метод определения оловаbasic solution of tin is poured into a measuring flask with a capacity of 100 cmГОСТ 13637.5-93 Галлий. Метод определения олова, made up of the polarographic background to the mark and mix.

1 cmГОСТ 13637.5-93 Галлий. Метод определения оловаof the solution contains 100 micrograms of tin (IV).

More dilute working solutions of tin is prepared by successive dilution of the polarographic background in a volume ratio 1:9 on the day of use.

3. ANALYSIS

3.1. Dissolution samples

A portion of gallium by mass of 2 g was dissolved with heating in 25 cmГОСТ 13637.5-93 Галлий. Метод определения оловаof distilled mixture of hydrochloric and nitric acids, taken in the ratio of 5:1, in a glass with a capacity of 300 cmГОСТ 13637.5-93 Галлий. Метод определения оловаunder the watch glass. After dissolution of the sample remove the glass, wash the glass and walls of beaker with distilled water, then the solution is evaporated to approximately 15 cmГОСТ 13637.5-93 Галлий. Метод определения олова. The side of the Cup is washed two times with distilled water in portions of 15−20 cmГОСТ 13637.5-93 Галлий. Метод определения олова, each time uparima the contents of the Cup to approximately 15 cmГОСТ 13637.5-93 Галлий. Метод определения олова. After complete removal of nitrogen oxides in the glass is poured 60−80 cmГОСТ 13637.5-93 Галлий. Метод определения оловаof distilled water, 2 cmГОСТ 13637.5-93 Галлий. Метод определения оловаof phosphoric acid, 30/MГОСТ 13637.5-93 Галлий. Метод определения оловаsolution of ethylenediaminetetraacetic acid (where M is the molar concentration of this solution, mol/DMГОСТ 13637.5-93 Галлий. Метод определения олова), 2 drops of a solution of methylorange and aqueous ammonia solution until the yellow colour of methylorange. The solution is heated to boiling. Add hydrochloric acid dropwise until slightly pink staining methylorange. Then add 0.3 cmГОСТ 13637.5-93 Галлий. Метод определения оловаof a solution of beryllium, 2 drops of solution of phenolphthalein and ammonia water solution rapidly in one portion. The required amount of ammonia to neutralize the solution until the red color of phenolphthalein is set in a parallel experience with the same amount of ethylenediaminetetraacetic acid. Then the solution was added 2 cmГОСТ 13637.5-93 Галлий. Метод определения оловаof ammonia solution and hot water to a total volume of 150 cmГОСТ 13637.5-93 Галлий. Метод определения олова. The solution after 1−2 min was stirred with a glass rod and leave to coagulate the precipitate. The hot solution is sucked off through the sintered filter PCF in a Bunsen flask, and the residue on the filter is washed 10 times with hot double-distilled

water.

3.2. Polarographically

The washed precipitate of phosphate of beryllium dissolved in the porous filter 15 cmГОСТ 13637.5-93 Галлий. Метод определения олова(in two steps), distilled with hydrochloric acid. The solution is aspirated into a quartz tube process, the filter was washed with 12 cmГОСТ 13637.5-93 Галлий. Метод определения оловаdouble-distilled water. The washing water is also aspirated into a test tube. To the solution in a test tube add two drops of gelatin solution. The solution was transferred to measuring cylinder and adjusted with bidistilled water up to 25 cmГОСТ 13637.5-93 Галлий. Метод определения олова. Inversion of the resulting solution voltamperometry register in the following conditions: the size of the stationary mercury drop corresponds to 20 divisions of the clock indicator; the potential accumulation minus 0,60 V; duration of accumulation with stirring 3 min, the peak Capacity of tin of about minus 0,49 V. the Voltammogram of each solution is removed three times.

3.3. Transcript of inversion voltammograms

The peak height is measured vertically, is drawn through the top of the peak to the intersection with a tangent connecting the bases of the branches peak. Each of the peak heights should not vary from the arithmetic average of the peak height ГОСТ 13637.5-93 Галлий. Метод определения оловаby more than 0.2 ГОСТ 13637.5-93 Галлий. Метод определения олова. If the height of the first peak differs from the average ГОСТ 13637.5-93 Галлий. Метод определения оловаby more than 0.2 ГОСТ 13637.5-93 Галлий. Метод определения олова, the height of the first peak is not considered.

Mass fraction of tin in the sample is determined by method of additions. The addition of the diluted working solution of tin not exceeding 1 cmГОСТ 13637.5-93 Галлий. Метод определения оловаis introduced into the entire volume polarographic solution. The solution with the addition of polarographic the same way as the analyzed solution.

Supplement should to increase the mass of tin in polarographically solution (and peak height) by 2−3 times, if the tin content in the sample ГОСТ 13637.5-93 Галлий. Метод определения оловаcalculated according to claim 4.1, not less than 3·10ГОСТ 13637.5-93 Галлий. Метод определения олова%.

If ГОСТ 13637.5-93 Галлий. Метод определения оловаless than 3·10ГОСТ 13637.5-93 Галлий. Метод определения олова%, the additive should be 0.05 µg of tin. When ГОСТ 13637.5-93 Галлий. Метод определения оловаmore than 3·10ГОСТ 13637.5-93 Галлий. Метод определения олова%, the additive should be less than 0.1 µg and not more than 2 mg.

With each series of samples is carried out two test experience.

4. PROCESSING OF THE RESULTS

4.1. Mass fraction of tin (ГОСТ 13637.5-93 Галлий. Метод определения олова) in percent is calculated by the formula

ГОСТ 13637.5-93 Галлий. Метод определения олова,


where ГОСТ 13637.5-93 Галлий. Метод определения олова — weight of tin in addition, mcg,

ГОСТ 13637.5-93 Галлий. Метод определения олова — arithmetic average peak height prerogrative of the sample solution minus the arithmetic mean values of the peak height of the tin in a control experiment, mm

ГОСТ 13637.5-93 Галлий. Метод определения оловаthe weight of gallium, g,

ГОСТ 13637.5-93 Галлий. Метод определения олова — arithmetic average peak height of the sample solution with the additive minus the arithmetic mean values of the peak height of the tin in a control experiment, mm

ГОСТ 13637.5-93 Галлий. Метод определения олова — volume polarographic solution sample of sample, cmГОСТ 13637.5-93 Галлий. Метод определения олова,

ГОСТ 13637.5-93 Галлий. Метод определения олова — volume Supplement, smГОСТ 13637.5-93 Галлий. Метод определения олова.

The average of heights of peaks of tin (ГОСТ 13637.5-93 Галлий. Метод определения олова) obtained in control experiments, um, shall not exceed the values

ГОСТ 13637.5-93 Галлий. Метод определения олова.

4.2. The result of the analysis taking the arithmetic average of the two results of parallel measurements carried out from separate batches.

The allowable discrepancy of the two results of parallel measurements and the two results of the analysis (the difference between larger and smaller) with confidence probability ГОСТ 13637.5-93 Галлий. Метод определения оловаof 0.95 is given in the table.

   
Mass fraction of tin, %
Allowable difference, %

3·10ГОСТ 13637.5-93 Галлий. Метод определения олова

2·10ГОСТ 13637.5-93 Галлий. Метод определения олова

6·10ГОСТ 13637.5-93 Галлий. Метод определения олова

3·10ГОСТ 13637.5-93 Галлий. Метод определения олова

1,0·10ГОСТ 13637.5-93 Галлий. Метод определения олова

0,4·10ГОСТ 13637.5-93 Галлий. Метод определения олова

5·10ГОСТ 13637.5-93 Галлий. Метод определения олова

2·10ГОСТ 13637.5-93 Галлий. Метод определения олова

1,0·10ГОСТ 13637.5-93 Галлий. Метод определения олова

0,2·10ГОСТ 13637.5-93 Галлий. Метод определения олова



Permitted discrepancies for the intermediate mass fraction of tin calculated using linear interpolation.

4.3. Control of the correctness analysis is carried out by additives according to GOST 25086.