简介:The Quick Easy Cheap Effective Rugged and
Safe multiresidue method (QuEChERS) has been validated
for the extraction of 80 pesticides belonging to various
chemical classes from various types of representative
commodit简介:The Quick Easy Cheap Effective Rugged and
Safe multiresidue method (QuEChERS) has been validated
for the extraction of 80 pesticides belonging to various
chemical classes from various types of representative
commodities with low lipid contents. A mixture of 38
pesticides amenable to gas chromatography (GC) were
quantitatively recovered from spiked lemon, raisins, wheat
flour and cucumber, and determined using gas chromatography–
tandem mass spectrometry (GC–MS/MS). An additional
mixture of 42 pesticides were recovered from oranges,
red wine, red grapes, raisins and wheat flour, using liquid
chromatography–tandem mass spectrometry (LC–MS/MS)
for determination. The pesticides chosen for this study
included many of the most frequently detected ones and/or
those that are most often found to violate the maximum
residue limit (MRL) in food samples, some compounds that
have only recently been introduced, as well as a few other
miscellaneous compounds. The method employed involved
initial extraction in a water/acetonitrile system,详细>