A gas chromatography-mass spectrometry method for the determination of 2-naphthoic acid and its derivatives in bean sprouts
A technology of gas chromatography and naphthoic acid, which can be used in measuring devices, instruments, scientific instruments, etc., and can solve problems such as lack of pretreatment methods for food substrates
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Embodiment 1
[0077] In Example 1, soybean sprouts were used as the sample matrix to carry out standard addition recovery experiments to verify the feasibility of the method of the present invention. The samples were purchased from Fuqing Yonghui Supermarket and processed according to the following steps:
[0078] (1) Extraction and adsorption of compounds: The bean sprouts samples were pulverized into mud and then sealed and stored at 4°C. When in use, take 50mL plastic centrifuge tubes with stoppers and weigh 10.00g of the samples respectively, and add 2.00mL of them at a concentration of 10.0μg / L, 20.0μg / L and 200.0μg / L standard solutions of three compounds, prepared three levels of six parallel spiked samples, vortexed for 2h and then added 2.0g of anhydrous sodium chloride and 20mL of ethyl acetate , homogenized at a high speed of 12000rpm and extracted for 3min, centrifuged, and the supernatant was taken into another centrifuge tube with a stopper, extracted once again, and the upper ...
Embodiment 2
[0086] In Example 2, mung bean sprouts were used as the sample matrix to carry out standard addition recovery experiments to verify the feasibility of the method of the present invention. The samples were purchased from Fuqing Yonghui Supermarket and processed according to the following steps:
[0087] (1) Extraction and adsorption of compounds: The bean sprouts samples were pulverized into mud and then sealed and stored at 4°C. When in use, take 50mL plastic centrifuge tubes with stoppers and weigh 10.00g of the samples respectively, and add 2.00mL of them at a concentration of 10.0μg / L, 20.0μg / L and 200.0μg / L standard solutions of three compounds, prepared three levels of six parallel spiked samples, vortexed for 2h and then added 2.0g of anhydrous sodium chloride and 20mL of ethyl acetate , extract by homogenizing at a high speed of 15000rpm for 5min, centrifuge, and take the supernatant to another centrifuge tube with a stopper, extract once again, combine the upper layer ...
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