Quantitative analysis of hydrolysis of carbaryl in tap water and river by excitation-emission matrix fluorescence coupled with second-order calibration.
A novel method was proposed to determine simultaneously carbaryl and its degradation product 1-naphthol in river and tap water in this paper. The parallel factor analysis (PARAFAC) algorithm was adopted to analyze the excitation-emission matrix (EEM) fluorescence data. The second-order advantage of the PARAFAC-based second-order calibration algorithm was exploited, which make it possible that calibration can be performed even in the presence of unknown interferences. Good recoveries were obtained although the excitation and emission spectral profiles of the analytes were overlapped with background in the river water. It was also applied to investigate the hydrolysis kinetics of carbaryl in river water and tap water. The rate equation, the rate constant and the half life were calculated.
Zhu
Shao-Hua
SH
State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.
Wu
Hai-Long
HL
Xia
A-Lin
AL
Han
Qing-Juan
QJ
Zhang
Yan
Y
Yu
Ru-Qin
RQ
D002138:Calibration; D012721:Carbaryl / Q000032:analysis* / Q000737:chemistry*; D002800:Cholinesterase Inhibitors; D005163:Factor Analysis, Statistical; D005618:Fresh Water / Q000032:analysis*; D006868:Hydrolysis; D007306:Insecticides; D007700:Kinetics; D045483:Rivers; D013057:Spectrum Analysis; D014881:Water Supply / Q000032:analysis*
D002800:Cholinesterase Inhibitors; D007306:Insecticides; D012721:Carbaryl