T/GXAF 0010-2023 Active Group standards

T/GXAF 0010-2023 Determination of Free Amino Acid Content in Water-soluble Fertilizer Using Spectrophotometry

Publish Date: 2023-04-10 Implement Date: 2023-05-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/GXAF 0010-2023

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: Fertilizer

Publish Date: 2023-04-10

Implement Date: 2023-05-01

Scope

Main technical content: This document specifies the experimental method for determining the content of free amino acids in water-soluble fertilizers. This document is applicable to the determination of free amino acids in liquid or solid water-soluble fertilizers (such as Letu Fu'an amino acid-containing water-soluble fertilizers and water-soluble fertilizers produced from alcohol wastewater, molasses solution, acidic amino acid raw powder, and alkaline amino acid raw powder). The principle is as follows: Activated carbon is used to adsorb proteins and eliminate interference from pigments. EDTA is used to chelate metal elements to release amino acids. The amino acids react with indoxyl to form a blue substance. Within a certain concentration range, the absorbance of the blue solution is directly proportional to the amount of amino acids. The total amino acid content is determined by spectrophotometry, and then divided by the correction coefficient to obtain the content of free amino acids.