NDLI: Capability of diatomaceous earth to preconcentrate and store Pb and Cr: on-line determination by FI-FAAS

Content Provider	Springer Nature Link
Author	Cabañero, Ana Madrid, Yolanda Cámara, Carmen
Copyright Year	2002
Abstract	The diatomaceous earth (DE) has an important ability to retain metals such as Cd, Cr, Mn and Pb, which can be used for their stabilization in the environment and for analytical purposes. In this paper a fast on-line preconcentration method for the determination of Cr and Pb in waters by flow injection flame atomic absorption spectrometry is described. Preconcentration was based on the retention of Cr and Pb on a DE immobilized in silica gel at pH 3.0 and subsequent elution with 200 µL of 3 mol L–1 HCl. The preconcentration factors were 100 and 150 for Pb and Cr respectively, for 16 mL water sample volume. The detection limits under these conditions were 3 ng mL–1 and 1 ng mL–1 for Pb and Cr, respectively. The stability of Cr and Pb retained on silica gel-DE columns was established. Silica gel-DE microcolumns with the retained analytes were stored for 2 months at two different temperatures: 4°C and room temperature. At regular time intervals, both metals were eluted and quantified. The results showed the potential of the procedure for sampling and storing water samples for subsequent metal determination, avoiding the problems associated with maintaining species integrity in aqueous solution, and the possibility to of decontaminating polluted spaces.
Starting Page	244
Ending Page	250
Page Count	7
File Format	PDF
ISSN	16182642
Journal	Analytical and Bioanalytical Chemistry
Volume Number	373
Issue Number	4-5
e-ISSN	16182650
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-04-13
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Analytical Chemistry Biochemistry Laboratory Medicine Characterization and Evaluation of Materials Food Science Monitoring/Environmental Analysis
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry Biochemistry

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