GB/T 23379-2009Method for determination of imidacloprid residues in fruits, vegetables and teas - High performance liquid chromatographic method (English PDF)
水果、蔬菜及茶叶中吡虫啉残留的测定 高效液相色谱法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
April 8, 2009
Implementation date
May 1, 2009
Scope
GB/T 23379-2009 is the English-translated version of 水果、蔬菜及茶叶中吡虫啉残留的测定 高效液相色谱法.
GB/T 23379-2009 is the Chinese standard "Method for determination of imidacloprid residues in fruits, vegetables and teas - High performance liquid chromatographic method".
Its scope clause reads: This standard specifies the method for determination of fruits, vegetables and tea imidacloprid pesticide residues. This standard applies to apples, pears, bananas, tomatoes, cucumbers, carrots and other fruits and vegetables, tea and determination of imidacloprid pesticide residues.
The detection limit of this standard are. fruit 0.02mg/kg, vegetables and tea 0.05mg/kg. Its clauses include reagents and materials.
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Document preview — GB/T 23379-2009
National Standard of the People's Republic of China
- Classification
- X 04
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Introduction
- 1 Scope
- 2 Normative references
- 3 Principle
- 4 Reagents and materials
- 5. Apparatus
- 6 measuring step
- 7 3 Calculation Results
- 8 Precision
1 Scope
This standard specifies the method for determination of fruits, vegetables and tea imidacloprid pesticide residues.
This standard applies to apples, pears, bananas, tomatoes, cucumbers, carrots and other fruits and vegetables, tea and determination of imidacloprid pesticide residues.
The detection limit of this standard are. fruit 0.02mg/kg, vegetables and tea 0.05mg/kg.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD)
GB/T 8855 fresh fruits and vegetables sampling method (GB/T 8855-2008, ISO 874. 1980, IDT)
Principle 3
Imidacloprid by acetonitrile extraction, salting concentrate was subjected to solid phase extraction, acetonitrile, HPLC 270nm
Testing.
4 Reagents and materials
Unless otherwise indicated, water GB/T 6682 a water regulations.
4.1 acetonitrile
chromatography.
4.2 Sodium hydroxide
AR.
4.3 Sodium chloride
AR.
4.4
SPE (ENVI-18 column, 3mL, 0.5g or equivalent person).
4.5 organic membrane
pore size 0.45µm.
Imidacloprid 4.6 Standard substance. purity of greater than 99%.
4.8 pesticide standard solution
4.8.1 Standard stock solution
Weigh about 10mg (accurate to 0.10mg) in 10mL volumetric flask, add acetonitrile sonication standards,
Standard stock solution dubbed 1000µg/mL or so, -18 °C refrigerator.
4.8.2 mixed standard solution
the need to use a diluted basis of the detection of different concentrations of standard solution, 4 °C refrigerator. Mixed Standard
Solution in the dark at 4 °C, can be used for two months.
4.9
purification process solution A (20mmol/LNaOH, NaCl saturated solution). Weigh 0.8gNaOH in 100mL beaker,
After adding a small amount of water to fully dissolve, then added sodium chloride to saturate, then poured into a 1000mL volumetric flask, then with saturated aqueous sodium chloride solution
To the mark.
4.10 purifying process solution B (20mmol/LNaOH solution)
Weigh 0.8gNaOH in 100mL beaker, add a small amount of
After fully dissolved water into 1000mL volumetric flask.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
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