Application of graphene nanoplatelets silica composite,prepared by sol–gel technology,as a novel sorbent in two microextraction techniques |
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| Authors: | Mahmoud Heidari Abdolrahman Bahrami Ali Reza Ghiasvand Farshid Ghorbani Shahna Ali Reza Soltanian Maryam Rafieiemam |
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| Affiliation: | 1. Department of Occupational Health, School of Health, Guilan University of Medical Sciences, Rasht, Iran;2. Department of Occupational Health, School of Health, Hamadan University of Medical Sciences, Hamadan, Iran;3. Department of Chemistry, Faculty of Science, Lorestan University, Khoramabad, Iran;4. Department of Biostatistics and Epidemiology, School of Health, Hamadan University of Medical Sciences, Hamadan, Iran |
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| Abstract: | In this study, the application of a novel nanomaterial composite was investigated in two microextraction techniques of solid‐phase microextraction and a needle trap device in a variety of sampling conditions. The optimum sampling temperature and relative humidity were 10°C and 20%, respectively, for both techniques with two sorbents of graphene/silica composite and polydimethyl siloxane. The two microextraction techniques with the proposed sorbent showed recoveries of 95.2 and 94.6% after 7 days. For the needle trap device the optimums desorption time and temperature were 3 min at 290°C and for SPME these measures were 1 and 1.5 min at 240–250°C for the graphene/silica composite and polydimethyl siloxane, respectively. The relative standard division obtained in inter‐ and intra‐day comparative studies were 3.3–14.3 and 5.1–25.4, respectively. For four sample the limit of detection was 0.021–0.25 ng/mL, and the limit of quantitation was 0.08–0.75 ng/mL. The results show that the graphene/silica composite is an appropriate extraction media for both techniques. Combining an appropriate sorbent with microextraction techniques, and using these in conjunction with a sensitive analytical instrument can introduce a strong method for sampling and analysis of occupational and environmental pollutants in air. |
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| Keywords: | Carbon tetrachloride Nano‐platelets graphene Needle trap device Sol‐gel technology Solid‐phase microextraction |
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