Pretreatment method of benzo (a) pyrene collected by glass fiber filter paper
A glass fiber and filter paper technology, applied in the analysis field of benzopyrene content determination, can solve problems such as benzo loss, chromatographic column damage, standard addition recovery rate, etc., and achieves high desorption recovery efficiency, fast pretreatment speed, and simple equipment. easy-to-get effect
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[0045] In the present invention, the pretreatment method of benzo(a)pyrene collected in glass fiber filter paper specifically comprises the following steps:
[0046] (1) Take a piece of glass fiber filter paper, cut it into pieces with scissors, put it into a 20mL brown headspace vial such as a brown headspace crimp bottle, and add 5μL, 10μL, and 20μL of the mixed standard with a microsyringe Samples, which are equivalent to adding 1 μg, 2 μg and 4 μg of benzo(a)pyrene, prepare 6 samples for each level, use special sealing pliers to tightly cover the sealing cover with the Teflon-lined sealing gasket, and let it stand More than 12 hours;
[0047] (2) Use special unsealing pliers to open the sealing cap of the headspace crimp top bottle, add 10mL of methanol, then add about 0.2g of basic alumina, cover a new sealing cap with a Teflon sealing liner and use special pliers to again to close;
[0048] (3) Put the headspace crimp bottle into the sonicator with 40kHz frequency and ...
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