High-efficiency liquid chromatography to mass spectrum detection method for ethyl carbamate in distilled liquor
A medium urethane, high performance liquid chromatography technology, applied in the field of analytical chemistry, can solve the problems of long time for chromatographic separation, complicated pretreatment methods, long time required, etc., and achieves short detection time, low cost, and accuracy. High performance and sensitivity
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[0019] The technical scheme of the present invention is a high-performance liquid chromatography-mass spectrometry detection method of urethane in distilled wine, comprising the following steps:
[0020] (1) Sample pretreatment: Measure a certain volume of distilled wine sample, remove the ethanol in the sample under reduced pressure with a rotary evaporator at 30~40°C, dilute to the original volume with distilled water, and filter;
[0021] (2) Detection: Take the processed distilled wine sample directly into LC-MS (liquid chromatography-mass spectrometry), select the protonated urethane molecular ion [M+H] + 90.055 is the quantitative ion for detection, and the content of urethane in the sample is calculated by the regression equation of the standard curve.
[0022] Further, the liquid chromatography conditions are as follows: the mobile phase is composed of A and B, wherein A is an aqueous solution containing 0.05-0.3% formic acid or acetic acid, B is acetonitrile or methan...
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