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Solid‐phase extraction disk based on multiwalled carbon nanotubes for the enrichment of targeted pesticides from aqueous samples
Author(s) -
Zdolšek Nikola,
Kumrić Ksenija,
Kalijadis Ana,
TrtićPetrović Tatjana
Publication year - 2017
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.201600957
Subject(s) - solid phase extraction , detection limit , extraction (chemistry) , aqueous solution , adsorption , chromatography , chemistry , tap water , desorption , solid phase microextraction , analytical chemistry (journal) , materials science , gas chromatography–mass spectrometry , mass spectrometry , organic chemistry , environmental engineering , engineering
A sensitive method for the determination of six varying polarity pesticides (imidacloprid, acetamiprid, carbendazim, simazine, linuron, and tebufenozide) based on a solid‐phase extraction disk with multiwalled nanotubes is proposed.A dispersion of multiwalled nanotubes in a surfactant aqueous solution (Triton X‐100) was used for the preparation of the solid‐phase extraction disk. The effect of surfactant on the functional groups of multiwalled nanotubes was examined by applying temperature‐programmed desorption. It was found that this treatment increased the amount of oxygen groups of treated multiwalled nanotubes comparing with untreated ones. The factors that may influence the adsorption and recovery such as the kind and volume of eluent, volume, flow rate and pH of sample were investigated and optimized. Under the optimized conditions, the maximal enrichment factors for low polar pesticides are ranging from 4000 to 4985 and for more polar are 2250 and 2750. The linear range of calibration curves was 10–500 ng/L with correlation coefficient higher than 0.9960, and the detection limit was 6.2–23.7 ng/L. Finally optimized method was applied for determination trace level of five out of six pesticides in tap and river water samples with good recovery.