title: [Quantitative determination of imidacloprid by infrared absorption spectrometry].
abstract: The content of imidacloprid in pesticide is usually measured by high-performance liquid chromatography, which is precise but time-consuming. In the present work the content of imidacloprid in pesticide was measured by infrared spectroscopy with pressing potassium bromide troche (KBr). A comparison of infrared spectra between analytic imidacloprid and commercial pesticide showed that the absorption peak of imidacloprid at 939.2 cm(-1) is independent and can be used as the characteristic absorption peak for quantitative determination. The area from 947 to 925.8 cm(-1) for the infrared spectra of imidacloprid and its content meet the linear equation: Area = l.3665 x 10(-1) + 2.37 x 10(-2) x c, r = 0.99953. Finally, the authors could draw a conclusion that the method of NIR, instead of routine lab analysis, is feasible for the determination of imidacloprid in pesticide.
authors.affiliation: Key Laboratory of Optoelectronic Technology and Intelligent Control, Ministry of Education, Lanzhou Jiaotong University, Lanzhou 730070, China.
authors.forename: Guo-xin
authors.initials: GX
authors.lastname: Ma
authors.forename: Cheng-long
authors.initials: CL
authors.lastname: Wang
authors.forename: Duo-wang
authors.initials: DW
authors.lastname: Fan
authors.forename: Da
authors.initials: D
authors.lastname: Xing
authors.forename: Long
authors.initials: L
authors.lastname: Qian
authors.forename: Jin-hui
authors.initials: JH
authors.lastname: Wang
authors.forename: Song-hao
authors.initials: SH
authors.lastname: Liu
mesh_terms: D007093:Imidazoles / Q000032:analysis*; D000073943:Neonicotinoids; D009574:Nitro Compounds / Q000032:analysis*; D010575:Pesticides / Q000032:analysis*; D013055:Spectrophotometry, Infrared / Q000379:methods*
chemical_list: D007093:Imidazoles; D000073943:Neonicotinoids; D009574:Nitro Compounds; D010575:Pesticides; C082359:imidacloprid