The use of silica-coated magnetic graphene microspheres as the adsorbent for the extraction of pyrethroid pesticides from orange and lettuce samples followed by GC-MS analysis.
Identifieur interne : 000C89 ( Main/Exploration ); précédent : 000C88; suivant : 000C90The use of silica-coated magnetic graphene microspheres as the adsorbent for the extraction of pyrethroid pesticides from orange and lettuce samples followed by GC-MS analysis.
Auteurs : Mengying Hou [République populaire de Chine] ; Xiaohuan Zang ; Chun Wang ; Zhi WangSource :
- Journal of separation science [ 1615-9314 ] ; 2013.
English descriptors
- KwdEn :
- Adsorption, Citrus sinensis (chemistry), Gas Chromatography-Mass Spectrometry, Graphite (chemistry), Lettuce (chemistry), Magnetic Fields, Microspheres, Particle Size, Pesticide Residues (isolation & purification), Pyrethrins (isolation & purification), Silicon Dioxide (chemistry), Surface Properties.
- MESH :
- chemical , chemistry : Graphite, Silicon Dioxide.
- chemistry : Citrus sinensis, Lettuce.
- chemical , isolation & purification : Pesticide Residues, Pyrethrins.
- Adsorption, Gas Chromatography-Mass Spectrometry, Magnetic Fields, Microspheres, Particle Size, Surface Properties.
Abstract
Graphene-grafted ferroferric oxide microspheres were used as the adsorbent to extract some pyrethroid pesticides (bifenthrin, λ-cyhalothrin, cyfluthrin, cypermethrin, fenvalerate, and deltamethrin) from orange and lettuce samples prior to their determination by GC-MS. The main variables that could affect the extraction, including the amount of the adsorbent, pH of the sample solution, extraction time, concentration of salt, and desorption conditions, were investigated and optimized. Under the optimized conditions, a linear response was obtained in the concentration range of 0.3-100.0 ng/g for the analytes with the coefficients of determination ranging from 0.9877 to 0.9925. The LODs for the pyrethroids ranged from 0.01 to 0.02 ng/g. The method provided a good repeatability with RSDs < 10.6%. The recoveries for the six pyrethroid pesticides were in the range from 90.0 to 103.7%. The method was applied to the determination of the pesticides in orange and lettuce samples with a satisfactory result.
DOI: 10.1002/jssc.201300656
PubMed: 23897627
Affiliations:
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Le document en format XML
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The main variables that could affect the extraction, including the amount of the adsorbent, pH of the sample solution, extraction time, concentration of salt, and desorption conditions, were investigated and optimized. Under the optimized conditions, a linear response was obtained in the concentration range of 0.3-100.0 ng/g for the analytes with the coefficients of determination ranging from 0.9877 to 0.9925. The LODs for the pyrethroids ranged from 0.01 to 0.02 ng/g. The method provided a good repeatability with RSDs < 10.6%. The recoveries for the six pyrethroid pesticides were in the range from 90.0 to 103.7%. The method was applied to the determination of the pesticides in orange and lettuce samples with a satisfactory result.</div></front></TEI><affiliations><list><country><li>République populaire de Chine</li></country></list><tree><noCountry><name sortKey="Wang, Chun" sort="Wang, Chun" uniqKey="Wang C" first="Chun" last="Wang">Chun Wang</name><name sortKey="Wang, Zhi" sort="Wang, Zhi" uniqKey="Wang Z" first="Zhi" last="Wang">Zhi Wang</name><name sortKey="Zang, Xiaohuan" sort="Zang, Xiaohuan" uniqKey="Zang X" first="Xiaohuan" last="Zang">Xiaohuan Zang</name></noCountry><country name="République populaire de Chine"><noRegion><name sortKey="Hou, Mengying" sort="Hou, Mengying" uniqKey="Hou M" first="Mengying" last="Hou">Mengying Hou</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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