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Simultaneous preconcentration and determination of 2,4‐ D , alachlor and atrazine in aqueous samples using dispersive liquid–liquid microextraction followed by high‐performance liquid chromatography ultraviolet detection
Author(s) -
Shamsipur Mojtaba,
Fattahi Nazir,
Pirsaheb Meghdad,
Sharafi Kiomars
Publication year - 2012
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201200424
Subject(s) - alachlor , chromatography , extraction (chemistry) , detection limit , disperser , atrazine , chemistry , high performance liquid chromatography , aqueous solution , calibration curve , tap water , analytical chemistry (journal) , sample preparation , materials science , pesticide , agronomy , composite material , biology , engineering , environmental engineering
Dispersive liquid–liquid microextraction coupled with high‐performance liquid chromatography‐ultraviolet detection as a fast and inexpensive technique was applied to the simultaneous extraction and determination of traces of three common herbicides, 2,4‐ D , alachlor and atrazine, in aqueous samples. The critical experimental parameters, including type of the extraction and disperser solvents as well as their volumes, sample p H , salt addition, extraction time and centrifuging time, and speed were investigated and optimized. Under the optimum conditions, the calibration graphs found to be linear in the range of 0.3–200 μg/L with limits of detection in the range of 0.05–0.1 μg/L. The relative standard deviations were in the range of 4.5–6.2% ( n = 7). The relative recoveries of well, tap, and river water samples which have been spiked with different levels of herbicides were 92.0–107.0, 82.0–104.0, and 82.0–86.0%, respectively.