ISSN:
1612-1112
Keywords:
Sedimentation field-flow fractionation
;
Clay analysis
;
Atomic absorption spectrometry
;
Detection limits
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Summary Electrothermal (graphite furnace) atomic absorption spectrometry (ETAAS), as off-line detector for sedimentation field-flow fractionation (SedFFF) is exploited in clay analysis. Quantitation limits of coupled SedFFF-ETAAS for the determination of a submicron kaolin sample, considered a representative model of natural water suspended particulate, are theoretically established and experimentally validated with reference to Al and Si determination by ETAAS. Complete sample recovery for a 4 μg injected kaolin sample was obtained by keeping adsorption in the SedFFF apparatus to a minimum under control. The best experimental conditions, ensuring sample integrity, were low ionic strength (Na2CO3, 10−5 M), pH 8 and a Teflon covered accumulation wall. Several different runs, revealing the various experimental parameters affecting quantitative recovery, are reported and the different physico-chemical processes affecting such recovery are discussed. The advantages and drawbacks of SedFFF-ETAAS coupling compared with inductively coupled plasma-mass spectrometry (ICP-MS) technique are also discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02267810
Permalink