Artículo
Cloud-point extraction/preconcentration on-line flow injection method for mercury determination
Garrido, Mariano Enrique
; Di Nezio, Maria Susana; Lista, Adriana Guillermina; Palomeque, Miriam Edid; Fernández Band, Beatriz Susana
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
Fecha de publicación:
01/2004
Editorial:
Elsevier Science
Revista:
Analytica Chimica Acta
ISSN:
0003-2670
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
A cloud-point extraction/preconcentration (CPE/P) step is incorporated on-line into a flow injection system which is used to determine low levels of Hg(II) added to natural water samples. The analyte is complexed with dithizone. A solid reagent column (SRC) is used to prepare the reagent on-line by using 5% (v/v) Triton X-100 solution as solvent. The CPE/P is carried out by using the non-ionic surfactant Triton X-100. After obtaining the cloud-point on-line, the surfactant-rich phase containing the complex is collected in a mini column packed with cotton wool. Then, a hot water stream is passed through the column to elute the complex and the absorbance is measured at 500nm. All the flow and chemical variables are optimized and the enhancement factor for the system is estimated. The calibration is linear over the range 0.05-0.5μgml -1, the R.S.D. is 4.8%, the limit of detection (signal:noise = 3) is 0.014μgml-1 and the sample throughput is 30h-1. An open/closed system is used to eliminate the interference of iron(III). © 2003 Elsevier B.V. All rights reserved.
Palabras clave:
CLOUD-POINT
,
MERCURY
,
ON-LINE EXTRACTION
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(INQUISUR)
Articulos de INST.DE QUIMICA DEL SUR
Articulos de INST.DE QUIMICA DEL SUR
Citación
Garrido, Mariano Enrique; Di Nezio, Maria Susana; Lista, Adriana Guillermina; Palomeque, Miriam Edid; Fernández Band, Beatriz Susana; Cloud-point extraction/preconcentration on-line flow injection method for mercury determination; Elsevier Science; Analytica Chimica Acta; 502; 2; 1-2004; 173-177
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