Monitoring traces of organochlorine pesticides in herbal matrices by bar adsorptive microextraction – Application to black tea and tobacco

Bar adsorptive microextraction followed by microliquid desorption and gas chromatography-mass spectrometry, under the selected ion monitoring acquisition mode, has been developed for the determination of 20 organochlorine pesticides (OCPs) in herbal matrices. Assays performed on 25 mL of ultra-pure water samples spiked at the 2.0 µg L−1 level, yielded average recoveries ranging from 14.0% to 95.1% for the target OCPs, under optimised...