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Campo DC | Valor | Lengua/Idioma |
---|---|---|
dc.creator | Castro Grijalba, Alexander | - |
dc.creator | Martinis, Estefanía Mabel | - |
dc.creator | Lascalea, Gustavo Enrique | - |
dc.creator | Wuilloud, Rodolfo German | - |
dc.date | 2018-02-28T17:43:46Z | - |
dc.date | 2018-02-28T17:43:46Z | - |
dc.date | 2015-01 | - |
dc.date | 2018-02-28T14:12:23Z | - |
dc.date.accessioned | 2019-04-29T15:46:07Z | - |
dc.date.available | 2019-04-29T15:46:07Z | - |
dc.date.issued | 2015-01 | - |
dc.identifier | Castro Grijalba, Alexander; Martinis, Estefanía Mabel; Lascalea, Gustavo Enrique; Wuilloud, Rodolfo German; Activated carbon-modified knotted reactor coupled to electrothermal atomic absorption spectrometry for sensitive determination of arsenic species in medicinal herbs and tea infusions; Elsevier; Spectrochimica Acta Part B: Atomic Spectroscopy; 103-104; 1-2015; 49-56 | - |
dc.identifier | 0584-8547 | - |
dc.identifier | http://hdl.handle.net/11336/37398 | - |
dc.identifier | CONICET Digital | - |
dc.identifier | CONICET | - |
dc.identifier.uri | http://rodna.bn.gov.ar:8080/jspui/handle/bnmm/301520 | - |
dc.description | A flow injection system based on a modified polytetrafluoroethylene (PTFE) knotted reactor (KR) was developed for arsenite [As(III)] and arsenate [As(V)] species preconcentration and determination by electrothermal atomic absorption spectrometry (ETAAS). Activated carbon (AC) was immobilized on the inner walls of a PTFE KR by a thermal treatment. A significant increase in analyte retention was obtained with the AC-modified KR (100%) as compared to the regular PTFE KR (25%). The preconcentration method involved the on-line formation of As(III)-ammonium pyrrolidinedithiocarbamate (As-APDC) complex, followed by its adsorption onto the inner walls of the AC-modified KR. After analyte retention, the complex was eluted with acetone directly into the graphite furnace of ETAAS. The parameters affecting the flow injection system were evaluated with a full central composite face centered design with three center points. Under optimum conditions, a preconcentration factor of 200 was obtained with 10 ml of sample. The detection limit was 4 ng L- 1 and the relative standard deviation (RSD) for six replicate measurements at 0.2 μg L- 1 of As were 4.3% and 4.7% for As(III) and As(V), respectively. The developed methodology was highly selective towards As(III), while As(V), monomethylarsonic acid [MMA(V)] and dimethylarsinic [DMA(V)] were not retained in the AC-modified KR. The proposed method was successfully applied for As speciation analysis in infusions originated from medicinal herbs and tea. | - |
dc.description | Fil: Castro Grijalba, Alexander. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza; Argentina | - |
dc.description | Fil: Martinis, Estefanía Mabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza; Argentina. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina | - |
dc.description | Fil: Lascalea, Gustavo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza; Argentina | - |
dc.description | Fil: Wuilloud, Rodolfo German. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza; Argentina. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina | - |
dc.format | application/pdf | - |
dc.format | application/pdf | - |
dc.format | application/pdf | - |
dc.format | application/pdf | - |
dc.format | application/pdf | - |
dc.format | application/pdf | - |
dc.format | application/pdf | - |
dc.format | application/pdf | - |
dc.language | eng | - |
dc.publisher | Elsevier | - |
dc.relation | info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.sab.2014.11.007 | - |
dc.relation | info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0584854714003127 | - |
dc.rights | info:eu-repo/semantics/restrictedAccess | - |
dc.rights | https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ | - |
dc.source | reponame:CONICET Digital (CONICET) | - |
dc.source | instname:Consejo Nacional de Investigaciones Científicas y Técnicas | - |
dc.source | instacron:CONICET | - |
dc.subject | ARSENIC SPECIATION | - |
dc.subject | ETAAS | - |
dc.subject | KNOTTED REACTOR | - |
dc.subject | MEDICINAL HERB | - |
dc.subject | TEA | - |
dc.subject | Otras Ciencias Químicas | - |
dc.subject | Ciencias Químicas | - |
dc.subject | CIENCIAS NATURALES Y EXACTAS | - |
dc.title | Activated carbon-modified knotted reactor coupled to electrothermal atomic absorption spectrometry for sensitive determination of arsenic species in medicinal herbs and tea infusions | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.type | info:ar-repo/semantics/articulo | - |
Aparece en las colecciones: | CONICET |
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