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GB/T 19136-2021 English PDF (GBT19136-2021)

GB/T 19136-2021 English PDF (GBT19136-2021)

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GB/T 19136-2021: Testing method of the accelerated storage stability at elevated temperature for pesticides

This document describes a method for the determination of accelerated storage stability of pesticides. This document is applicable to the determination of accelerated storage stability of pesticide preparation products.
GB/T 19136-2021
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 65.100
CCS G 23
Replacing GB/T 19136-2003
Testing method of the accelerated storage stability at
elevated temperature for pesticides
ISSUED ON: DECEMBER 31, 2021
IMPLEMENTED ON: JULY 01, 2022
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 5
4 Test methods ... 5
Testing method of the accelerated storage stability at
elevated temperature for pesticides
1 Scope
This document describes a method for the determination of accelerated storage stability of pesticides.
This document is applicable to the determination of accelerated storage stability of pesticide preparation products.
2 Normative references
This document has no normative references.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply. 3.1 controlled-release formulation
through functional materials or controlled release technology, the formulation that the release of active ingredients is purposely controlled and has a long-lasting effect 3.2 long lasting storage bag
the storage bag formulation that, through special treatment, the release of active ingredients can be slowed down or controlled, thereby forming physical and chemical control of pests
3.3 matrix release
the formulation that slows down or controls the release of active ingredients through the polymer matrix, so as to achieve the purpose of sustained long-term effect 4 Test methods
WARNING: Personnel using this document shall have practical experience in laboratory work. This document does not address all security issues. It is the user's responsibility to take appropriate safety and health precautions.
4.1 General
Accelerated storage stability test conditions are generally 14 days at 54??? ?? 2???. The test conditions may be changed when the preparation is neither suitable nor intended for use in hot climates, and when high temperatures have a negative effect on the preparation. Alternative conditions are: 50??C??2??C, 4 weeks; 45??C??2??C, 6 weeks; 40??C??2??C, 8 weeks; 35??C??2??C, 12 weeks; 30??C??2??C, 18 weeks.
The sample size of accelerated storage test shall be determined according to the specified items after accelerated storage. Sampling shall be carried out according to the characteristics of different dosage forms.
4.2 Method summary
After storing the specimen at 54??C??2??C for 14 days, measure the specified items. 4.3 Instruments
4.3.1 Thermostat: 54??C??2??C, an explosion-proof thermostat shall be used for the aerosol.
4.3.2 Storage containers shall meet the following conditions:
a) Liquid preparations, powder preparations, granular preparations, long-term mosquito nets and long-term storage bags shall be in screw-top glass bottles with polytetrafluoroethylene seals or original packaging;
b) Aerosols, anti-mosquito nets, dispersing wicks and electric heating mosquito- repellent coils are in original packaging;
c) The matrix releases are packaged in aluminum foil paper or in the original commodity packaging;
d) For other formulations, a storage container or original product packaging that has no effect on the specimen and can be sealed shall be selected.
4.4 Test steps
4.4.1 Liquid, powder and granule formulations
Place the specimen in a glass bottle and seal it. Store in an incubator at 54??C??2??C for 14 d. Take out. Put in a desiccator. Cool to room temperature. Complete the determination of the specified items such as the mass fraction of active ingredients within 24 h.
The accelerated storage test can also be carried out directly using the original package of the commodity.
4.4.2 Aerosol

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