GOST 25284.0-95
GOST 25284.0−95 Alloy zinc. General requirements for methods of analysis
GOST 25284.0−95
Group B59
INTERSTATE STANDARD
ZINC ALLOYS
General requirements for methods of analysis
Zinc alloys. General requirements for methods of analysis
ISS 71.040.40*
AXTU 1709
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* In the Index «National standards» in 2007.
ISS
Date of introduction 1998−01−01
Preface
1 DEVELOPED by the Donetsk state Institute of non-ferrous metals (Danism); International technical Committee MTC 107
SUBMITTED to the State Committee of Ukraine for standardization, Metrology and certification
2 ADOPTED by the Interstate Council for standardization, Metrology and certification (EASC Protocol No. 7 of April 26, 1995)
The adoption voted:
| The name of the state |
The name of the national authority for standardization |
| The Republic Of Belarus |
Gosstandart Of Belarus |
| The Republic Of Moldova |
Moldovastandart |
| Russian Federation |
Gosstandart Of Russia |
| Ukraine |
Gosstandart Of Ukraine |
3 Resolution of the State Committee of the Russian Federation for standardization, Metrology and certification dated June 2, 1997 N 204 inter-state standard GOST 25284.0−95 was put into effect directly as the state standard of the Russian Federation from January 1, 1998
4 REPLACE GOST 25284.0−82
1 SCOPE
This standard applies to zinc alloys, and establishes General requirements for methods of analysis GOST 25086 with additions.
2 NORMATIVE REFERENCES
The present standard features references to the following standards:
GOST 19424−74 zinc Alloys for casting into ingots. Specifications*
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* Standards 19424−97, here and hereafter. — Note the manufacturer’s database.
GOST 21437−95 zinc antifriction Alloys. Marks, technical requirements and test methods
GOST 21438−95 zinc antifriction Alloys in pigs. Specifications
GOST 24231−80 non-ferrous metals and alloys. General requirements to selection and preparation of samples for chemical analysis
GOST 25086−87 non-ferrous metals and their alloys. General requirements for methods of analysis
GOST 25140−93 zinc Alloys for casting. Brand
GOST 28053−89 Shavings of non-ferrous metals and alloys. Methods of sampling, sample preparation and test methods
3 REQUIREMENTS
3.1 Sampling and sample preparation of alloys to the analysis carried out according to GOST 24231, 28053 GOST, GOST 19424, 21438 GOST, GOST 25140, 21437 GOST and other normative documents for specific products.
3.2 Mass concentration was calculated based on the third significant digit.
3.3 the contents of the element in the alloy is set on two parallel portions (definitions).
3.4 the Divergence between the results of the parallel determinations should not exceed the allowable given in the standards methods for determining elements.
3.5 For the analytical result should be the arithmetic mean of two parallel definitions, to meet the requirements of 3.4.
3.6 in the control of accuracy of analysis results on the standard samples of composition played mass fraction of component in the standard sample should not differ from the certified characteristics by more than where
is the absolute acceptable standards for methods of analysis of the discrepancy between the results of primary and repeated analyses of the same samples obtained by the same method under different conditions (different time, different performers, with the reagents from different batches).
3.7 in the control of accuracy of analysis results by the method of additions was found, the magnitude of the additive should not differ from the entered by more than 
and
is the absolute maximum discrepancy between the results of the analysis of the sample with additive and without additive, respectively.
3.8 Requirements for safety — according to normative documentation approved in the established order.
