Detection of pesticide residue parameters in agricultural products

This standard specifies a gas chromatography-mass spectrometry method for the determination of 208 pesticides and their metabolites (see Appendix A) residues in plant-based foods. This standard is applicable to the determination of 208 pesticides and their metabolites residues in plant-based foods

The following normative references are essential for the application of this document. For dated application documents, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this document. GB 2763 National Standard for Food Safety Maximum Residue Limits of Pesticides in Food GB/T 6682 Specification and Test Methods for Water for Analytical Laboratory 3 Principle samples are extracted with acetonitrile, the extract solution is purified by solid phase extraction or dispersed solid phase extraction, the vegetable oil sample is purified by gel permeation chromatography, detected by gas chromatography-mass spectrometry, and quantified by internal standard method or external standard method. Unless otherwise specified, only analytically pure reagents shall be used in the analysis, and water shall be grade I water as specified in GB/T 6682. 4.1 Reagent 4.1.1 Acetonitrile (CH, CN, CAS No. 75-05-8). 4.1.2 Ethyl acetate (CH, COOC Hs, CAS No. 141-78-6): Chromatically pure. 4.1.3 Toluene (C, Hg, CAS No. 108-88-3): Chromatically pure. 4.1.4 Cyclohexane (CaHz, CAS number; 110-82-7); Chromatographic purity. 4.1.5 Sodium chloride (NaC1, CAS No. 7647-14-5). 4.1.6, Sodium acetate (CH, COONA. CAS No. 6131-90-4). 4.1.7 Acetic acid (CH, COOH, CAS number 55896-93- o). 4.1.8 Magnesium sulfate (MgSO., CAS No. 7487-88-9). 4.1.9 Sodium citrate (Na; C.H: O, CAS No. 6132-04-3). 4.1.10 Disodium hydrogen citrate (CHgNagO, CAS No. 6132-05-4). 4.2 Solution Preparation 4.2.1 Acetonitrile Acetic Acid Solution (99+1, volume ratio): Measure 10 mL of acetic acid and add it to 990 mL of acetonitrile, mix well. 4.2.2 Acetonitrile toluene solution (3+1, volume ratio); Measure 100 mL of toluene and add it to 300 mL of ethylene wax, and mix well. 4.2.3 GPC mobile phase: cyclohexane ethyl acetate solution (1+1, volume ratio): Take 500 mL of cyclohexane and add it to 500 mL of ethyl acetate, and mix well

Function of testing report:

1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report

2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms

3. Used as a sales report: issuing legally effective testing reports to make consumers more confident

4. Papers and research: Provide professional personalized testing needs

5. Judicial services: providing scientific, fair, and accurate testing data

6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problems

BAIJIAN testing process:

1. Telephone communication and confirmation of requirements

2. Recommend solutions and confirm quotations

3. Mail samples and arrange testing

4. Progress tracking and result feedback

5. Provide reports and after-sales service

6. If urgent or priority processing is required

Our Competitive Edge:

1. The testing industry is fully covered, meeting different testing needs

2. Fully cover the laboratory and allocate localized testing nearby

3. Engineers provide one-on-one services to make testing more accurate

4. Free initial testing, with no testing fees charged

5. Self service order delivery for free on-site sampling

6. Short cycle, low cost, and attentive service

7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc

8. The testing report is authoritative and effective, and is generally used in China