This standard specifies requirements, test methods, inspection rules, marking, packaging, transport and storage of triple superphosphorate.
This standard is applicable to powdered and granular triple superphosphorate (including triple superphosphorate products added with organic matter and other additives) used in agriculture, made from powdered rock phosphate treated by wet- or thermal-process phosphoric acid.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition applies.
GB/T 1250 Rules for expression and judgment of limiting values
GB/T 6003.1-1997 Test sieves of metal wire cloth (eqv ISO 3310-1: 1990)
GB/T 6679 General rules for sampling solid chemical products
GB 18382 Fertilizer marking- Presentation and declaration (GB 18382-2001, neq ISO 7409: 1984)
HG/T 2843 Chemical fertilizer products - Standard volumetric, standard, reagent and indicator solutions for chemical analysis
3 Requirements
3.1 Powdered triple superphosphorate
3.1.1 Appearance: colored powder, without mechanical impurities.
3.1.2 Powdered triple superphosphorate shall meet the requirements of Table 1 as well as the indicated values.
