title: Study on the photodegradation and microbiological degradation of pirimicarb insecticide by using liquid chromatography coupled with ion-trap mass spectrometry.
abstract: The intermediates of photodegradation and microbial degradation of pirimicarb insecticide were investigated by liquid chromatography coupled with ion-trap mass spectrometry (LC-IT-MS). Different intermediates were detected in the photodegradation and microbial degradation of pirimicarb. In the photodegradation of pirimicarb in aqueous solution 2-dimethylamino-5,6-dimethyl-4-hydroxypyrimidine (MW=167), 2-methylamino-5,6-dimethylpyrimidin-4-yl-dimethylcarbamate (MW=224) and 2-formylamino-5,6-dimethylpyrimidin-4-yl-dimethylcarbamate (MW=252) were the main products. It was found that 2-dimethylamino-5,6-dimethyl-4-hydroxypyrimidine (MW=167) was the major product in the microbial degradation of pirimicarb in soil.
authors.affiliation: Department of Chemistry, Ministry of Education Key Laboratory of Analysis and Detection Technology for Food Safety, Fuzhou University, Fuzhou, Fujian, China.
authors.forename: Tianwen
authors.initials: T
authors.lastname: Chen
authors.forename: Fengfu
authors.initials: F
authors.lastname: Fu
authors.forename: Zhixin
authors.initials: Z
authors.lastname: Chen
authors.forename: Danzhen
authors.initials: D
authors.lastname: Li
authors.forename: Lan
authors.initials: L
authors.lastname: Zhang
authors.forename: Guonan
authors.initials: G
authors.lastname: Chen
mesh_terms: D001234:Aspergillus niger / Q000378:metabolism*; D002219:Carbamates / Q000032:analysis / Q000378:metabolism; D002853:Chromatography, Liquid / Q000379:methods*; D007306:Insecticides / Q000032:analysis / Q000378:metabolism; D013058:Mass Spectrometry / Q000379:methods*; D019906:Nuclear Magnetic Resonance, Biomolecular; D010782:Photolysis; D011743:Pyrimidines / Q000032:analysis / Q000378:metabolism; D014466:Ultraviolet Rays
chemical_list: D002219:Carbamates; D007306:Insecticides; D011743:Pyrimidines; C011994:pirimicarb