Issue 10, 2004
From the journal:

Journal of Analytical Atomic Spectrometry

Flow injection on-line preconcentration of palladium by ion-pair adsorption in a knotted reactor coupled with electrothermal atomic absorption spectrometry

Boryana Dimitrova,a   Karima Benkhedda,b   Elisaveta Ivanovaa  and  Freddy Adams*b  

* Corresponding authors

a Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Bl. 11, Acad. G. Bontchev st., 1113 Sofia, Bulgaria

b Micro-Trace Analysis Centre, Department of Chemistry, University of Antwerp, Drie Eiken campus, B-2610 Antwerp, Belgium
E-mail: Freddy.Adams@ua.ac.be

Abstract

A flow injection (FI) method for the preconcentration/separation of palladium, coupled with electrothermal atomic absorption spectrometry (ETAAS), is presented. The preconcentration was performed by on-line formation of an ion-pair between the positively charged potassium complex of 1,4,7,10,13,16-hexaoxacyclooctadecane (K+18-crown-6) and the palladium thiocyanate anion (Pd(SCN)42−) and its sorption on the inner walls of a PTFE knotted reactor (KR). The elution was achieved by methanol acidified with 1% (v/v) HNO3. An enhancement factor of 29 and a sampling frequency of 14 h−1 were obtained for a preconcentration time of 90 s and a sampling flow rate of 4.4 ml min−1. The detection limit (3σ) is 16 ng l−1 and precision (RSD) for 0.4 µg l−1 Pd is 2.3%. The method was validated by recovery measurements on spiked blood and road dust samples.

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Article information

DOI
https://doi.org/10.1039/B407546N
Article type
Technical Note
Submitted
18 May 2004
Accepted
16 Jun 2004
First published
23 Aug 2004

J. Anal. At. Spectrom., 2004,19, 1394-1396

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Flow injection on-line preconcentration of palladium by ion-pair adsorption in a knotted reactor coupled with electrothermal atomic absorption spectrometry

B. Dimitrova, K. Benkhedda, E. Ivanova and F. Adams, J. Anal. At. Spectrom., 2004, 19, 1394 DOI: 10.1039/B407546N

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