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Flow Injection Spectrophotometric Determination of 2,4‐D Herbicide
Author(s) -
Shah Jasmin,
Rasul Jan M.,
Bashir Nadia
Publication year - 2006
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200600111
Subject(s) - chemistry , sulfanilic acid , absorbance , chromatography , calibration curve , acetic acid , hydrolysis , relative standard deviation , residue (chemistry) , flow injection analysis , standard solution , detection limit , organic chemistry
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.