Journal
JOURNAL OF SEPARATION SCIENCE
Volume 36, Issue 21-22, Pages 3586-3591Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201300373
Keywords
GC-MS; Graphene; Organochlorine pesticides; Solid-phase extraction
Categories
Funding
- National Natural Science Foundation of China [21075074, 21275082, 81102411]
- Natural Science Foundation of Qingdao [13-1-4-128-jch, 13-1-4-202-jch]
- Natural Science Foundation of Shandong [ZR2011BZ004, ZR2011BQ005]
- JSPS
- NSFC under the Japan-China Scientific Cooperation Program [21111140014]
- State Key Laboratory of Analytical Chemistry for Life Science [SKLACLS1110]
- National Key Basic Research Development Program of China (973 special preliminary study plan) [2012CB722705]
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The determination of organochlorine pesticides in water samples, which are harmful to humans, is very important for environmental risk assessment. Based on the excellent adsorption properties of graphene, an SPE coupled with GC-MS method for the monitoring of organochlorines (four hexachlorcyclohexanes and four dichlorodiphenyltrichloroethanes) was developed. Owing to the hydrophobic interaction and - stacking interaction between the analytes and graphene, the analytes quantitatively adsorbed onto the graphene-based SPE cartridge were eluted by ethyl acetate for analysis. Several parameters influencing the analytical performance, such as the kind of elution, sample volume, reusability of the cartridge, have been investigated in detail. Under the optimal conditions, detection of limits of 1.95-9.38 ng/L, recoveries of 83.9-107.3% at two spiked concentration levels (0.1 and 10 ng/mL) and RSDs in the range of 2.9-7.4% for real water samples were obtained for all the analytes. This work reveals the great potential of graphene in sample preparation procedures.
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