Preprocessing method suitable for analyzing estrogen and bisphenol A in complex matrix solid sample
A complex matrix, estrogen technology, applied in the direction of analysis materials, material separation, measurement devices, etc., can solve the problem of difficult processing technology
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[0037] The following combination of examples and attached figure 2 The technical solution of the present invention is further described.
[0038] (1) Sample extraction
[0039] The collected solid samples were freeze-dried and ground. After accurately weighing the sample, use 60ml of acetone / methanol=1:1 (v / v) as the extractant, and extract the estrogen and bisphenol A in the sample with a fast solvent; then it is concentrated to about 1ml by rotary evaporation and blown with nitrogen. dry.
[0040] (2) Extraction solution purification
[0041] The sample extract is first purified by liquid-liquid extraction (LLE). After re-dissolving the residue with 10ml of acetonitrile, add 10ml of n-hexane and vortex for 10 minutes to extract non-polar substances such as grease in the extract. Repeat twice to discard the n-hexane phase, and dry the acetonitrile phase with nitrogen. Then proceed to the second step of Florisil (6cc, 500mg) purification: re-dissolve the LLE purification residue w...
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