title: Fate of pesticides during beer brewing.
abstract: The fates of more than 300 pesticide residues were investigated in the course of beer brewing. Ground malt artificially contaminated with pesticides was brewed via steps such as mashing, boiling, and fermentation. Analytical samples were taken from wort, spent grain, and beer produced at certain key points in the brewing process. The samples were extracted and purified with the QuEChERS (Quick Easy Cheap Effective Rugged and Safe) method and were then analyzed by LC-MS/MS using a multiresidue method. In the results, a majority of pesticides showed a reduction in the unhopped wort and were adsorbed onto the spent grain after mashing. In addition, some pesticides diminished during the boiling and fermentation. This suggests that the reduction was caused mainly by adsorption, pyrolysis, and hydrolysis. After the entire process of brewing, the risks of contaminating beer with pesticides were reduced remarkably, and only a few pesticides remained without being removed or resolved.
authors.affiliation: Department of Safety Evaluation, Research Laboratories for Food Safety Chemistry, Asahi Breweries, Ltd., Moriya-Shi, Ibaraki, Japan.
authors.forename: Tomonori
authors.initials: T
authors.lastname: Inoue
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Nagatomi
authors.forename: Keiko
authors.initials: K
authors.lastname: Suga
authors.forename: Atsuo
authors.initials: A
authors.lastname: Uyama
authors.forename: Naoki
authors.initials: N
authors.lastname: Mochizuki
mesh_terms: D000327:Adsorption; D001515:Beer; D002853:Chromatography, Liquid; D003296:Cooking; D027582:Humulus / Q000737:chemistry; D006868:Hydrolysis; D010575:Pesticides / Q000032:analysis* / Q000737:chemistry; D053719:Tandem Mass Spectrometry
chemical_list: D010575:Pesticides