GC-MS/MS (gas chromatography-tandem mass spectrometry) method for analyzing pyrethroid pesticide residue in tobacco and tobacco product
A technology for pyrethroid and tobacco products, which is applied in the field of determination of pyrethroid pesticide residues
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example 1
[0040] 1. Instruments and reagents:
[0041] Pyrethroid pesticides: bifenthrin, cyfluthrin, cyhalothrin, cypermethrin, deltamethrin, fenvalerate, flucyvalerate, permethrin (cis), permethrin (trans ), tefluthrin, internal standard: TPP, all standard; acetonitrile, acetone, n-hexane, all chromatographic grade reagents; distilled water, in line with the requirements of first-grade water in GB / T 6682.
[0042] American Thermo Fisher TSQ Quantum GC gas chromatography-triple quadrupole tandem mass spectrometer; Swiss Mettler AE 163 electronic balance (sensitivity: 0.0001g); American Labnet VtexMixer VX200 oscillator; German Sigma high-speed refrigerated centrifuge.
[0043] 2. Sample handling:
[0044] Weigh about 2 g of sample, accurate to 0.01 g, into a 50 mL centrifuge tube with a cover, add 10 mL of water, shake until the sample is fully infiltrated by water, and then let stand for 10 min. Pipette 10 mL of acetonitrile into a centrifuge tube, add 100 μL of internal standard wo...
example 2
[0059] As described in Example 1, another tobacco sample B was selected, and the contents of pyrethroid pesticide targets in the sample were measured in Table 4.
[0060] Table 4 Detection results of pesticide targets in sample B
[0061] serial number Chinese common name Content of pesticide target in the sample (μg / g) 1 Bifenthrin —— 2 Cyfluthrin —— 3 Cyhalothrin —— 4 Cypermethrin —— 5 deltamethrin —— 6 Fenvalerate 0.02 7 flucyvalerate —— 8 Permethrin (cis) —— 9 Permethrin (trans) —— 10 Tefluthrin ——
[0062] Note: "—" means not detected
example 3
[0064] As described in Example 1, another tobacco sample C was selected, and the contents of pyrethroid pesticide targets in the sample were measured in Table 5.
[0065] table 5 Detection results of pesticide targets in sample C
[0066] serial number Chinese common name Content of pesticide target in the sample (μg / g) 1 Bifenthrin —— 2 Cyfluthrin —— 3 Cyhalothrin 0.03 4 Cypermethrin —— 5 deltamethrin —— 6 Fenvalerate 1.32 7 flucyvalerate —— 8 Permethrin (cis) —— 9 Permethrin (trans) —— 10 Tefluthrin ——
[0067] Note: "—" means not detected
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