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37. Fuzzy-based Probabilistic Ecological Risk Assessment Approach: A Case Study of Heavy Metal Contaminated Soil

Author

Gaurav, Vivek Kumar, Sharma, Chhaya, Buhlan, Rakesh, Sethi, Sushanta K., Kacprzyk, Janusz, Series editor, Pal, Nikhil R., Advisory editor, Bello Perez, Rafael, Advisory editor, Corchado, Emilio S., Advisory editor, Hagras, Hani, Advisory editor, Kóczy, László T., Advisory editor, Kreinovich, Vladik, Advisory editor, Lin, Chin-Teng, Advisory editor, Lu, Jie, Advisory editor, Melin, Patricia, Advisory editor, Nedjah, Nadia, Advisory editor, Nguyen, Ngoc Thanh, Advisory editor, Wang, Jun, Advisory editor, Pant, Millie, editor, Ray, Kanad, editor, Sharma, Tarun K., editor, Rawat, Sanyog, editor, and Bandyopadhyay, Anirban, editor

Published
2018
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48. UiO-66-NH2: a recyclable and efficient sorbent for dispersive solid-phase extraction of fluorinated aromatic carboxylic acids from aqueous matrices.

Author

Kumar, Anuj and Sharma, Chhaya

Subjects
*CARBOXYLIC acids, *SOLID phase extraction, *ARTIFICIAL seawater, *TRACE analysis, *DRINKING water, *WATER sampling, *MASS spectrometry
Abstract

The present study describes the trace analysis of 23 fluorinated aromatic carboxylic acids based on the dispersive solid-phase extraction (dSPE) technique using UiO-66-NH2 MOF as efficient, recyclable sorbent, and GC–MS negative ionization mass spectrometry (NICI MS) as determination technique. All 23 fluorobenzoic acids (FBAs) were enriched, separated, and eluted in a shorter retention time; the derivatization was done by pentafluorobenzyl bromide (1% in acetone), in which the use of inorganic base K2CO3 was improved by triethylamine to increase the lifespan of the GC column. The performance of UiO-66-NH2 was evaluated by dSPE in Milli-Q water, artificial seawater, and tap water samples, and the impact of various parameters on the extraction efficiency was investigated by GC-NICI MS. The method was found to be precise, reproducible, and applicable to the seawater samples. In the linearity range, the regression value was found to be >0.98; LOD and LOQ were found to be in the range of 0.33–1.17 ng/mL and 1.23–3.33 ng/mL, respectively; and the value of the extraction efficiency was found to range between 98.45 and 104.39% for Milli-Q water samples, 69.13–105.48% for salt-rich seawater samples, and 92.56–103.50% for tap water samples with a maximum RSD value of 6.87% that confirms the applicability of the method to different water matrices. [ABSTRACT FROM AUTHOR]

Published
2023
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