GB/T 11957-2001 English PDF

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GB/T 11957-2001: Determination of yield of humic acids in coal
Status: Valid

GB/T 11957: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 11957-2001	159	Add to Cart	3 days	Determination of yield of humic acids in coal	Valid
GB/T 11957-1989	239	Add to Cart	2 days	Determination of yield of humic acids in coal	Obsolete

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Basic data

Standard ID: GB/T 11957-2001 (GB/T11957-2001)
Description (Translated English): Determination of yield of humic acids in coal
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: D21
Classification of International Standard: 73.040
Word Count Estimation: 6,699
Date of Issue: 2001-11-12
Date of Implementation: 2002-08-01
Older Standard (superseded by this standard): GB/T 11957-1989
Quoted Standard: GB/T 212-2001;
Adopted Standard: ISO 5073-1999; MOD
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China
Summary: This standard specifies: Two coal humic acid yield determination Method, namely volumetric method and residual method (the former for arbitration), and provides measurement reagents, equipment, measurement procedure, the results of the calculation and precision. This standard applies to: lignite, bituminous coal and weathering of low metamorphic grade coal.

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