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  • 1
    Electronic Resource
    Electronic Resource
    Application of an on-line preconcentration system in simultaneous ICP-AES (1992)
    Springer
    Microchimica acta 106 (1992), S. 191-201 
    Details
    ISSN: 1436-5073
    Keywords: ICP-AES ; preconcentration ; standard reference materials ; trace element analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A PC-controlled on-line preconcentration system (TRACECON) developed by Knapp et al. [11], was connected to a JY-70 Plus simultaneous ICP spectrometer to preconcentrate on-line seven trace elements (Cu, Fe, Zn, Cr, Ni, Mn, V) in biological and environmental samples. EDTrA-cellulose was used as column material. The elemental concentrations were determined by simultaneous ICP-AES. The effect of pH of the sample solution on the enrichment was studied. It was found that the recoveries of chromium and iron depend strongly on the pH of the sample solution. All the elements mentioned were recovered quantitatively at pH 4.0±0.1. The flow rates of sample solution and element solution were optimized. The enrichment factors for seven elements at 5 ml loading volume range from 3.9 for Cu to 7.9 for Zn. The detection limits of all seven elements were improved. The accuracy of the method was tested by the analysis of a number of CRMs of NIST, BCR and NIES. Most results are in good agreement with the certified values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01242090
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  • 2
    Electronic Resource
    Electronic Resource
    Determination of noble metals after separation and preconcentration with silica-bonded complexing ligands (1996)
    Springer
    Microchimica acta 124 (1996), S. 235-240 
    Details
    ISSN: 1436-5073
    Keywords: noble metals ; palladium ; platinum ; gold ; silver ; separation ; complexing agents ; preconcentration ; ICP-AES ; ICP-MS
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Noble metals are preconcentrated and separated from the matrix elements by adsorption on proper complexing ligands immobilized on silica gel and subsequent elution. Preconcentration factors of 5–10 were achieved. The reliability of the method was proved by analysis of a spiked soil material and a CRM with ICP-AES and ICP-MS. Ag, Au, Pd and Pt showed a good recovery in the spiked material. The indicative value for gold in the CRM (145 BCR) could be confirmed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01242821
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  • 3
    Electronic Resource
    Electronic Resource
    Capillary electrophoresis interfaced to inductively coupled plasma mass spectrometry for element selective detection in arsenic speciation (1998)
    Weinheim : Wiley-Blackwell
    Electrophoresis 19 (1998), S. 2220-2225 
    Details
    ISSN: 0173-0835
    Keywords: Capillary electrophoresis ; Interfacing ; ICP-MS ; Arsenic ; Speciation ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: A method is presented to separate and detect six arsenic species by capillary electrophoresis (CE) interfaced to inductively coupled plasma mass spectrometry (ICP-MS). CE was used as a highly resolving separation system, whereas ICP-MS served as an element selective detector providing low detection limits. The special mode of operation included sample stacking and a differentiation of separation and detection. This provided separation and detection of six As species, uncharged and anionic, to be monitored within a single run. Detection limits were calculated according to IUPAC recommendation at 15 μg As/L for As (III), dimethyl arsinic acid (DA), monomethyl arsonic acid (MA) and As (V), or 65 μg As/L for arsenobetaine (AsB) and arsenocholine (AsC). Investigations were focused on possibly occurring interferences, e.g., ArCl+ interference at the monoisotope 75As. Finally, real samples from biomedical field (urine) and environmental field (sewage sludge) were analyzed.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elps.1150191229
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