title: [Fast determination of the proportion of metalaxyl-M enantiomers by UV spectroscopy].
abstract: In the present study, beta-cyclodextrin(betaCD) was used as chiral selector to detect the proportion of chiral isomers of metalaxyl. The proportion of metalaxyl enantiomers can be detected by ultraviolet (UV)spectroscopy since the interaction between the R, S isomer of metalaxyl with beta-CD is different. The quantitative models were established by partial least squares regression (PLS) and the robust of models was evaluated by independent validation samples. The determination coefficient R2 of calibration set in the quantitative model was 0.999 0. The standard error of calibration set (SEC) and the relative standard deviation (RSD) of the model was respectively 0.006 7 and 0.89%; The correlation coefficient r of estimated value and specified value of the 6 independent validation samples was 0.998 5. The standard error of prediction (SEP) and RSD was respectively 0.008 9 and 1.17%. This method is rapid and easy to operate in practical applications.
authors.affiliation: Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China. lgq_0828@yahoo.com.cn
authors.forename: Qian-Qian
authors.initials: QQ
authors.lastname: Li
authors.forename: Ye-Wei
authors.initials: YW
authors.lastname: Zhu
authors.forename: Yan-Mei
authors.initials: YM
authors.lastname: Xiong
authors.forename: Jia
authors.initials: J
authors.lastname: Duan
authors.forename: Li-Jun
authors.initials: LJ
authors.lastname: Wu
authors.forename: Chun-Zi
authors.initials: CZ
authors.lastname: Li
authors.forename: Shun-Geng
authors.initials: SG
authors.lastname: Min