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Sol–gel/nanoclay composite as a sorbent for microextraction in packed syringe combined with corona discharge ionization ion mobility spectrometry for the determination of diazinon in water samples
Author(s) -
Saraji Mohammad,
Jafari Mohammad Taghi,
Amooshahi Mohammad Mehdi
Publication year - 2018
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.201700967
Subject(s) - ion mobility spectrometry , sorbent , chromatography , detection limit , solid phase microextraction , extraction (chemistry) , diazinon , mass spectrometry , analyte , packed bed , elution , calibration curve , analytical chemistry (journal) , chemistry , corona discharge , sample preparation , materials science , gas chromatography–mass spectrometry , electrode , adsorption , organic chemistry , pesticide , agronomy , biology
Abstract In this work, the microextraction in packed syringe technique combined with corona discharge ion mobility spectrometry was used for determining diazinon in water samples. A new porous composite of nanoclay and polysiloxane was prepared using a sol–gel process. An amount of 2.0 mg of the sorbent was packed in a 250 μL syringe and used for extraction. A volume of 2 mL of the sample was passed through the sorbent bed, and the entrapped analyte was eluted by 25 μL of methanol. Important parameters influencing the extraction performance were investigated. Under optimum experimental conditions, the detection limit for diazinon was 0.07 ng/mL. The intra‐ and inter‐day relative standard deviations were 5.0 and 12.3%, respectively. The calibration curve was linear in the concentration range from 0.2 to 20.0 ng/mL ( r 2 = 0.999). The applicability of the method was demonstrated by analyzing spiked real water samples and the spiking recoveries were in the range of 95 to 106%.