GB/T 20406-2017Potassium sulfate for agricultural use (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 20406-2006 "agricultural potassium sulfate." The main differences between this standard and GB/T 20406-2006 are.

--- The original standard water salt system technology agriculture with potassium sulfate requirements and non-salt water system process agriculture with potassium sulfate requirements combined For agricultural use of potassium sulfate requirements;

--- Increasing the sulfur content requirements and testing methods.

1 Scope

This standard specifies the requirements of agricultural potassium sulfate, test methods, inspection rules, labeling, packaging, transportation and storage.

This standard applies to all kinds of solid agricultural production with potassium sulfate.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 6003.1 Test sieve - Technical requirements and testing - Part 1: Wire braid test sieve

GB/T 6679 General rules for sampling solid chemical products

Representation and determination of rules for repair of numerical values and limit values GB/T 8170-2008

GB/T 8569 solid chemical fertilizer packaging

GB 18382 fertilizer labeling content and requirements

HG/T 2843 chemical analysis of fertilizer products commonly used standard titration solution, standard solution, reagent solution and indicator solution

3 Requirements

3.1 Appearance. powder crystals or particles, no mechanical impurities.

3.2 Agricultural potassium sulfate products should meet the requirements of Table 1, at the same time should be consistent with the marked value.

4 Test methods

The reagents used in this standard, the preparation of water and solution, did not specify the specifications and preparation methods, according to the provisions of HG/T 2843 preparation.