PASSIVE-SAMPLER EMPLOYED FOR ANTIFOULING BOOSTER BIOCIDES ANALYSES IN SEAWATER
| Autor: | Marta S. D. Freitas, Rodrigo M. Batista, Andressa R. C. Costa, Ozelito P. de Amarante Junior, Teresa C. R. S. Franco, Gilberto Fillmann, Natilene M. Brito |
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| Jazyk: | English<br />Spanish; Castilian<br />Portuguese |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Química Nova, Vol 48, Iss 2 (2024) |
| Druh dokumentu: | article |
| ISSN: | 1678-7064 0100-4042 |
| DOI: | 10.21577/0100-4042.20250028 |
| Popis: | The antifouling booster biocides are frequently studied for toxic effects on the aquatic ecosystems. The present investigation proposes passive silicone rubber samplers as a collection method for biocides, once these methods can concentrate substances in aqueous matrices at very low levels. Through the passive sampler-water partition coefficient (Ksw) and the analyte chemical nature, we can optimize their extraction from the membrane to apply in the sample medium. We used the co-solvent method to determine the Ksw of three third-generation antifouling biocides, chlorothalonil, dichlofluanid, and dichlorooctylisothiazolinone (DCOIT), with log Ksw = 2.24, 4.01, and 2.38, respectively. Improving extraction also led to a recovery range higher than 70%, determinations were carried out by gas chromatography with an electron capture detector. Biocides concentration in seawater samples from Itaqui port (São Marcos Bay, northern Brazil) ranged from 0.058 to 0.72 µg L-1 for chlorothalonil, 0.001 to 0.008 µg L-1 for dichlofluanid, and 0.018 to 0.64 µg L-1 for DCOIT. |
| Databáze: | Directory of Open Access Journals |
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