GB/T 8573-2010: Determination of available phosphorus content for compound fertilizers

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Scope

This Standard specifies the extraction and determination method for water-soluble
phosphorus content and available phosphorus content for compound fertilizers and
specifies the calculation method for the percentage of water-soluble phosphorus in
available phosphorus.
This Standard applies to compound fertilizers containing phosphorus (including mixed
fertilizers), does not apply to compound fertilizers, such as ammonium phosphate,
nitric acid phosphate and potassium dihydrogen phosphate, that are synthesized by
chemical method.

Basic Data

Standard ID	GB/T 8573-2010 (GB/T8573-2010)
Description (Translated English)	Determination of available phosphorus content for compound fertilizers
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	G20
Classification of International Standard	65.080
Word Count Estimation	6,669
Date of Issue	2010-09-26
Date of Implementation	2011-03-01
Older Standard (superseded by this standard)	GB/T 8573-1999
Quoted Standard	GB/T 8571; HG/T 2843
Regulation (derived from)	National Standard Approval Announcement 2010 No.6 (Total No.161)
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary	This standard specifies the method of extraction and determination of water-soluble phosphorus compound fertilizers and phosphorus content. And provides for the calculation of the percentage of water-soluble phosphorus phosphorus accounted for. This standard applies to phosphorus fertilizer (including mixed fertilizer), does not apply to ammonium, nitrate fertilizer, potassium dihydrogen phosphate chemically synthesized compound fertilizer.