GB/T 18412.4-2006Textiles - Determination of the pesticide residues - Part 4: Pyrethroid pesticides (English PDF)
纺织品 农药残留量的测定 第4部分：拟除虫菊酯农药
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
May 25, 2006
Implementation date
December 1, 2006
Scope
GB/T 18412.4-2006 is the English-translated version of 纺织品 农药残留量的测定 第4部分：拟除虫菊酯农药.
GB/T 18412.4-2006 is the Chinese standard "Textiles - Determination of the pesticide residues - Part 4: Pyrethroid pesticides".
Its scope clause reads: This part of GB/T 18412 specifies the methods for the determination of 12 pyrethroid pesticides (see Annex A) residues in textiles by gas chromatography-electron capture detector (GC-ECD) and gas chromatography-mass spectrometry (GC-MS).
This part is applicable to textile materials and their products. Its clauses include principle; reagents and materials.
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Document preview — GB/T 18412.4-2006
National Standard of the People's Republic of China
- ICS
- 59.080.01
- Classification
- W 04
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Principle
- 3 Reagents and materials
- 4 Instruments and apparatus
- 5 Analytical procedure
- 6 Calculation of results
- 7 Determination lower limit, recovery rate and precision
- 8 Test report
- Annex A (Normative) List of 12 pyrethroid pesticides
- Annex B (Informative) Quantitative and qualitative selected ions of pyrethroid pesticides and determination lower limit
- Annex C (Informative) Gas chromatogram (GC-ECD) of standard pyrethroid pesticides
- Annex D (Informative) Gas chromatogram-mass spectrogram (GC-MSD) of standard pyrethroid pesticides
1 Scope
This part of GB/T 18412 specifies the methods for the determination of 12 pyrethroid pesticides (see Annex A) residues in textiles by gas chromatography-electron capture detector (GC-ECD) and gas chromatography-mass spectrometry (GC-MS).
This part is applicable to textile materials and their products.
2 Principle
Extract the specimen ultrasonically by acetone-n-hexane (1+4), concentrate the extracting solution to a constant volume, and then determine it with a gas chromatography-electron capture detector (GC/ECD) and quantify by external standard method, or determine and confirm it by gas chromatography-mass spectrometry (GC-MS) and quantify by external standard method.
3 Reagents and materials
Unless otherwise specified, all reagents used shall be analytically pure reagents.
3.1 Acetone
residue grade.
3.2 N-hexane
residual grade.
3.3 Anhydrous sodium sulfate
burned at 650°C for 3 h, and then stored in desiccator for standby after cooling down.
3.4
Acetone-n-hexane (1+4).
3.5 Standard pyrethroid pesticides
purity >= 98%, see Annex A.
3.6 Standard stock solution
Accurately weigh an appropriate amount of each standard pyrethroid pesticide separately, and prepare standard stock solution with a mass concentration of 100 µg/mL with n-hexane.
3.7 Mixed standard working solution
Dilute the above solution with n-hexane step by step as required to form series mixed standard working solutions with applicable concentrations.
Note: The validity period of the standard stock solution is 12 months in a refrigerator at 0°C ~ 4°C, and that of the mixed standard working solution is 6 months in a refrigerator at 0°C ~ 4°C.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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Related Standards
GB/T 18412.1-2006 — Textiles-Determination of the pesticide residues-Part 1: 77 pesticides
GB/T 18412.2-2006 — Textiles-Determination of the pesticide residues-Part 2: Organochlorine pesticides
GB/T 18412.3-2006 — Textiles—Determination of the pesticide residues—Part 3: Organophosphrous pesticides
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GB/T 18412.4-2006
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