GB/T 32777-2016 English PDF

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GB/T 32777-2016: Test method of degree of dissolution and solution stability for pesticides
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 32777-2016	109	Add to Cart	3 days	Test method of degree of dissolution and solution stability for pesticides	Valid

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Basic data

Standard ID: GB/T 32777-2016 (GB/T32777-2016)
Description (Translated English): Test method of degree of dissolution and solution stability for pesticides
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G23
Classification of International Standard: 65.100
Word Count Estimation: 5,510
Date of Issue: 2016-06-14
Date of Implementation: 2017-01-01
Quoted Standard: GB/T 5451-2001
Regulation (derived from): National Standard Announcement No. 8 of 2016
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 determination of the degree of dissolution of the pesticide and the stability of the solution. This standard applies to the solubility of pesticide soluble powder, soluble granules, soluble tablets and other water-soluble solid preparations and the determination of solution stability.

GB/T 32777-2016: Test method of degree of dissolution and solution stability for pesticides

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Test method of degree of dissolution and solution stability for pesticides ICS 65.100 G23 National Standards of People's Republic of China Determination of pesticide solubility and solution stability 2016-06-14 release 2017-01-01 Implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009. This standard is proposed by the China Petroleum and Chemical Industry Association. This standard is nationalized by the National Pesticide Standardization Technical Committee (SAC/TC133). This standard is responsible for drafting units. Shenyang Chemical Industry Research Institute Co., Ltd. This standard participates in the drafting unit. Hengshui North Pesticide Chemical Co., Ltd., Anhui Fengle Agrochemical Co., Ltd., Shenzhen Nuopu letter agricultural Co., Ltd., Jiangsu Fengdeng Crop Protection Co., Ltd. The main drafters of this standard. Zhao Qi, Xu Shengli, Huang Liang, Li Ouyan, Geng Rongwei. Determination of pesticide solubility and solution stability

1 Scope

This standard specifies the degree of pesticide solubility and solution stability of the determination method. This standard applies to pesticide soluble powder, soluble granules, soluble tablets and other water-soluble solid preparation of the degree of solubility and solution stability Qualitative determination.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article Pieces. For undated references, the latest edition (including all modifications) applies to this document. Method for determination of wettability of pesticide wettable powder GB/T 5451-2001

3 test method

3.1 Method Summary The samples were dissolved in standard hard water at 30 ° C, inverted 15 times, allowed to stand for 5 min, filtered through a 75 μm test sieve, and the residue was sieved Material. Solution stability The solution was allowed to stand for 18 h and then filtered again with a 75 μm test sieve. 3.2 Instruments and reagents Standard sieve. pore size 75μm, diameter 76mm. Scale cylinder. glass, with plug, 0mL ~ 250mL scale distance between 20cm ~ 21.5cm, 250mL scale line and the bottom of the plug The distance is 4cm ~ 6cm. Standard hard water. Standard hard water [ρ (Ca2 Mg2) = 342 mg/L], 30 ° C ± 3 ° C according to the method described in GB/T 5451-2001 2 ° C. 3.3 Preparation of sample solution Add 2/3 of the preheated 30 ° C standard hard water in a 250 mL graduated cylinder and add a quantity of sample (the number of samples should be Recommended the highest use of the same concentration, not less than 3g), plus standard hard water to the mark, cover the plug. Standing for 30s, hand down the cylinder 15 times (180 °), reset, reverse, reset the time used no more than 2s. 3.4 5 min after the test The sample solution in the graduated cylinder was allowed to stand for 5 min ± 30 s and poured into a constant weight 75 μm test sieve. The filtrate was collected in 500 mL Beaker, left for the next step. Wash the graduated cylinder with 20 mL of distilled water 5 times, all the insoluble material quantitative transfer to the screen, abandoned to wash The test sieve was dried to constant weight at 60 ° C and weighed (accurate to 0.0001 g). 3.5 after 18h test After standing for 18 h, the solution in the beaker was filtered through a 75 μm test sieve and the test sieve was washed with 100 mL of distilled water. Will test The sieve was dried to constant weight at 60 ° C and weighed (accurate to 0.0001 g). ......

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