GOST 9816.5-84
Change N 1 GOST 9816.5−84 Tellurium technical. Method of atomic-absorption analysis
THE CHANGE IN N 1
GOST 9816.5−84 «Tellurium technical. The method of atomic absorption analysis»
Date of introduction 1990−07−01
APPROVED AND promulgated by the Decree of the USSR State Committee on management of quality and standards from
Section 2. Fifth paragraph, add the following value: 2:1;
sixth paragraph, add the following value: 4 mol/DM;
replace link: GOST GOST 9849−74 on 9849−86.
Paragraph 3.1. The first paragraph after the words «flask with a capacity of 250−300 cm», add the words: «or a glass with a capacity of 100 cm. In a flask»; add the words: «the Cup is closed with a cover glass, pour 7−10 cmof nitric acid (2:1) and slightly heated at a temperature of 30−40°C to dissolve the sample. The solution was then heated in a water bath to remove oxides of nitrogen. Glass glass is removed, wash it with water above the glass and to the obtained solution flow 5−10 cmof hydrochloric acid to dissolve the salts»;
second paragraph. To replace values: 50−250 cmin 25−250 cm; after the words «hydrochloric acid 2 mol/DM», add the words: «(the decomposition in the flask) and 4 mol/DM(decomposition in a glass)».
Paragraph 3.2. The first paragraph after the words «hydrochloric acid 2 mol/DM», add the words «or 4 mol/DM».
Paragraph 4.2. The first paragraph to state in a new wording: «the Difference of greatest and least result of two parallel measurements with a confidence probability of 0.95 does not exceed the allowable absolute values of the differences given in the table».