- 作者: --
- 作者服務機構: Department of Chemistry, University of Peshawar, N.W.F.P., Pakistan
- 中文摘要: 2,4-Dichlorophenoxy acetic acid herbicide is spectrophotometrically determined by diazotization method in a flow injection assembly. The method is based on base hydrolysis of herbicides. The hydrolyzed product 2,4-dichlorophenol is reacted with diazotized sulfanilic acid. The absorbance of the resulting coloured product was measured at 480 nm. The calibration graph is linear over the range of 0.2-20 μgmL-1, with a relative standard deviation of (RSD) of 7.2% and sample throughput of 90 samples h-1. The % recovery for determination of 2,4-dichlorophenoxy acetic acid was found to be 92.0-95.3%. The method is easy, simple and faster than the established chromatographic method. The method was applied for determination of 2,4-dichlorophenoxy acetic acid herbicide in commercial formulations and for residue determination in fruits and food samples.
- 英文摘要: --
- 中文關鍵字: 2,4-D herbicide; Diazotization; Spectrophotometric; Flow injection.
- 英文關鍵字: --