DIRECT INFUSION ESI-MS APPLIED IN THE DETECTION OF BYPRODUCTS DUE TO REDUCTIVE DEGRADATION OF ACETAMIPRID BY ZERO-VALENT IRON
| Autor: | Marília M. Salvador, Marciano F. de Almeida, Rodinei Augusti, Jean C. Cruz, Renata Pereira Lopes, Marina Ferreira dos Reis |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
zero-valent iron (ZVI)
Zerovalent iron Chromatography Hydrogen Nitrile Chemistry Electrospray ionization acetamiprid chemistry.chemical_element Substrate (chemistry) General Chemistry High-performance liquid chromatography lcsh:Chemistry chemistry.chemical_compound lcsh:QD1-999 Pyridine Chlorine byproducts direct infusion electrospray ionization mass spectrometry (ESI-MS) Nuclear chemistry degradation |
| Zdroj: | Química Nova v.38 n.8 2015 Química Nova Sociedade Brasileira de Química (SBQ) instacron:SBQ Química Nova, Volume: 38, Issue: 8, Pages: 1027-1030, Published: SEP 2015 LOCUS Repositório Institucional da UFV Universidade Federal de Viçosa (UFV) instacron:UFV Química Nova, Vol 38, Iss 8, Pp 1027-1030 (2015) |
| Popis: | This study investigated the reductive degradation of acetamiprid (5 mg L-1) in aqueous medium (at pH 2.0) induced by zero-valent iron (50 mg). The process was monitored using high-performance liquid chromatography (HPLC) to determine the degradation rate as a function of reaction time, and direct infusion electrospray ionization mass spectrometry (DI-ESI-MS) to search for (and potentially characterize) any possible byproducts formed during degradation. The results obtained via HPLC showed that after 60 min, the degradation of the substrate reached nearly 100% in an acidic medium, whereas the mineralization rate (as determined by total organic carbon measurements) was as low as 3%. Data obtained by DI-ESI-MS showed that byproducts were formed mainly by insertions of hydrogen atoms into the nitrile, imine, and pyridine ring moieties, in addition to the observation of chlorine substitution by hydrogen replacement (hydrodechlorination) reactions. |
| Databáze: | OpenAIRE |
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