GB/T 20696-2021Lambda-cyhalothrin emulsifiable concentrate (English PDF)

Foreword

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

This standard replaces GB/T 20696-2006 "Lambda-cyhalothrin EC". Compared with GB/T 20696-2006, this standard except for The main technical changes besides the editorial modification are as follows.

--- Modified the description about the appearance (see 3.1, 3.1 in the 2006 edition);

--- The label value of the mass score of lambda-cyhalothrin has been deleted, the specific mass score value has been added, and the upper and lower limits have been specified (see 3.2, 3.2 of the 2006 edition);

---Revised the pH indicator (see 3.2, 3.2 in the 2006 edition);

--- Deleted moisture control items, indicators and analysis methods (see 3.2 and 4.4 in the 2006 edition);

--- Modified the emulsion stability, low temperature stability, and thermal storage stability indicators (see 3.2, 3.2 in the 2006 edition);

---Added persistent foaming control items, indicators and analysis methods (see 3.2 and 4.6);

---Modified the solvent of the internal standard solution of gas chromatography (see 4.3.2.2.5, 4.3.2.2 of the 2006 edition);

---Modified the description of thermal storage stability (see 4.8, 4.8 in 2006 edition);

--- Added a chapter "Inspection Rules" (see Chapter 5);

---Adjust "sampling" to the chapter "inspection rules", and change the title to "sampling" (see 5.1, 4.1 in 2006 edition).

1 Scope

This standard specifies the technical requirements, test methods, inspection rules, acceptance and quality assurance periods, signs, and symbols of Lambda-cyhalothrin EC. Labeling, packaging, storage and transportation.

This standard applies to the lambda-cyhalothrin EC prepared by dissolving the lambda-cyhalothrin technical medicine and emulsifier in a suitable solvent.

Note: See Appendix A for other names, structural formulas and basic physical and chemical parameters of lambda-cyhalothrin.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document. For undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 1601 Method for determination of pH value of pesticides

GB/T 1603 Determination of the stability of pesticide emulsions

GB/T 1604 Acceptance Rules for Commodity Pesticides

GB/T 1605-2001 Commercial pesticide sampling method

GB 4838 Pesticide Emulsifiable Concentrate Packaging

GB/T 8170-2008 Numerical rounding rules and the expression and determination of limit values

GB/T 19136-2003 Method for determination of thermal storage stability of pesticides

GB/T 19137-2003 Method for determination of low temperature stability of pesticides

GB/T 28137 Determination method for persistent foaming of pesticides

GB/T 32776-2016 Method for determination of pesticide density

3 Technical requirements