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Application of dispersive liquid–liquid microextraction based on solidification of floating organic drop for simultaneous determination of alachlor and atrazine in aqueous samples
Author(s) -
Pirsaheb Meghdad,
Fattahi Nazir,
Shamsipur Mojtaba,
Khodadadi Tarokh
Publication year - 2013
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.201200872
Subject(s) - alachlor , chromatography , disperser , tap water , extraction (chemistry) , atrazine , aqueous solution , chemistry , drop (telecommunication) , detection limit , high performance liquid chromatography , liquid liquid , sample preparation , residue (chemistry) , calibration curve , analytical chemistry (journal) , materials science , pesticide , environmental science , environmental engineering , telecommunications , computer science , agronomy , composite material , biology , biochemistry
Dispersive liquid–liquid microextraction based on solidification of floating organic drop coupled with HPLC ‐ UV detection as a fast and inexpensive technique was applied to the simultaneous extraction and determination of traces of two common herbicides, alachlor and atrazine, in aqueous samples. The critical experimental parameters, including type of the extraction and disperser solvents as well as their volumes, sample pH, salt addition, and extraction time were investigated and optimized. Under the optimum conditions, the calibration graphs found to be linear in the range of 0.1–200 μg/L with LOD in the range of 0.02–0.05 μg/L. The RSD s were in the range of 4.2–5.3% ( n = 5). The relative recoveries of well, tap, and river water samples which have been spiked with different levels of herbicides were 94.0–106.0, 99.0–105.0, and 88.5–97.0%, respectively.