GB/T 5009.219-2008Determination of the residues of chlorcholine chloride in cereals (English PDF)
粮谷中矮壮素残留量的测定
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 3, 2008
Implementation date
March 1, 2009
Scope
GB/T 5009.219-2008 is the English-translated version of 粮谷中矮壮素残留量的测定.
GB/T 5009.219-2008 is the Chinese standard "Determination of the residues of chlorcholine chloride in cereals". Its scope clause reads: This standard specifies the method for determination of chlormequat residues in cereal grains.
This standard applies to corn, buckwheat determination of chlormequat residues in.
This standard corn, buckwheat chlormequat residue detection limit of 0.01 mg/kg, the linear range of 0.005 mg/L ~ 1.00mg/L. Principle 2 After extraction with methanol according to the solubility of CCC sample extract purified by alumina column, and benzene derivatives produced by the reaction of sodium sulfur, distribution There are mass selective detector for gas chromatography (GC-MSD) was measured, quantified by external standard. Its clauses include reagents and materials; instrument.
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Document preview — GB/T 5009.219-2008
National Standard of the People's Republic of China
- ICS
- 67.040
- Classification
- C 53
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 3 Reagents and materials
- 3.1 anhydrous sodium sulfate (Na2SO4)
- 3.2 neutral alumina (Al2O3)
- 3.7 chlormequat (C5H13NCl2) standards
- 3.8 Cycocel standard solution
- 4 Instrument
- 4.1 Gas chromatography - mass spectrometry
- 4.3 neutral alumina column
- 4.4 tube
- 5.1 Extraction
1 Scope
This standard specifies the method for determination of chlormequat residues in cereal grains.
This standard applies to corn, buckwheat determination of chlormequat residues in.
This standard corn, buckwheat chlormequat residue detection limit of 0.01 mg/kg, the linear range of 0.005 mg/L ~
1.00mg/L.
Principle 2
After extraction with methanol according to the solubility of CCC sample extract purified by alumina column, and benzene derivatives produced by the reaction of sodium sulfur, distribution
There are mass selective detector for gas chromatography (GC-MSD) was measured, quantified by external standard.
3 Reagents and materials
Unless otherwise noted, all reagents were of analytical grade water as a water (conductivity 25 °C <=0.01mS/m).
3.1 anhydrous sodium sulfate (Na2SO4)
burning 4h at 650 °C, after cooling stored in a desiccator.
3.2 neutral alumina (Al2O3)
650 °C burning 4h, stored in a sealed container before use at 130 °C drying 2h, cold storage in a dryer
But spare.
3.3
benzene Sodium (C6H5SNa).
3.4
methanol (CH4O).
2-butanone solution of 3.6 6mg/mL of benzene Sodium. Weigh 0.6g of sodium thiophenol in a stoppered flask, was added 100mL dried over anhydrous sodium
Dehydration of 2-butanone.
3.7 chlormequat (C5H13NCl2) standards
purity > 98.0%, CAS 999-81-5 is.
3.8 Cycocel standard solution
Accurately weigh an adequate amount Cycocel standard, accurate to 0.0001g, prepared in methanol concentration
100mg/L stock standard solution, according to the needs and then diluted with methanol to the appropriate concentration of the standard solution, stored at 4 °C refrigerator, you can use
90d.
4 Instrument
4.1 Gas chromatography - mass spectrometry
equipped with electron impact ionization (EI source).
4.2
ultrasonic extractor.
4.3 neutral alumina column
12.5cm × 1.5cm (inner diameter), with sand core, built-3cm high column of neutral alumina.
4.4 tube
5mL, with ground glass stopper.
4.5
rotary evaporator.
Step 5 Analysis
5.1 Extraction
Crushed and weighed by 2.0mm round hole sieve sample 20g (accurate to 0.01g) in 250mL stoppered Erlenmeyer flask, 60mL
Methanol extracts on ultrasonic extraction 20min, the extract was 2g anhydrous sodium sulfate and filtered. Were washed twice with 20mL of methanol with stopper cone […]
......
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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