Direct determination of cadmium and copper in seawater using a transversely heated graphite furnace atomic absorption spectrometer with Zeeman-effect background corrector
Identifieur interne : 000411 ( Main/Exploration ); précédent : 000410; suivant : 000412Direct determination of cadmium and copper in seawater using a transversely heated graphite furnace atomic absorption spectrometer with Zeeman-effect background corrector
Auteurs : Mei-Shu Chan [République populaire de Chine] ; Shang-Da Huang [République populaire de Chine, Taïwan]Source :
- Talanta [ 0039-9140 ] ; 2000.
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Abstract
Methods for the direct determination of copper and cadmium in seawater were described using a graphite furnace atomic absorption spectrometer (GFAAS) equipped with a transversely heated graphite atomizer (THGA) and a longitudinal Zeeman effect background corrector. Ammonium nitrate was used as the chemical modifier to determine copper. The mixture of di-ammonium hydrogen phosphate and ammonium nitrate was used as the chemical modifier to determine cadmium. The matrix interference was removed completely so that a simple calibration curve method could be applied. This work is the first one with the capability of determining cadmium in unpolluted seawater directly with GFAAS using calibration curve based on simple aqueous standards. The accuracy of the methods was confirmed by analysis of three kinds of certified reference saline waters. The detection limits (LODs), with injection of a 20-μl aliquot of seawater sample, were 0.06 μg l−1 for copper and 0.005 μg l−1 for cadmium.
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DOI: 10.1016/S0039-9140(99)00283-0
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Ammonium nitrate was used as the chemical modifier to determine copper. The mixture of di-ammonium hydrogen phosphate and ammonium nitrate was used as the chemical modifier to determine cadmium. The matrix interference was removed completely so that a simple calibration curve method could be applied. This work is the first one with the capability of determining cadmium in unpolluted seawater directly with GFAAS using calibration curve based on simple aqueous standards. The accuracy of the methods was confirmed by analysis of three kinds of certified reference saline waters. The detection limits (LODs), with injection of a 20-μl aliquot of seawater sample, were 0.06 μg l−1 for copper and 0.005 μg l−1 for cadmium.</div></front></TEI><affiliations><list><country><li>République populaire de Chine</li><li>Taïwan</li></country></list><tree><country name="République populaire de Chine"><noRegion><name sortKey="Chan, Mei Shu" sort="Chan, Mei Shu" uniqKey="Chan M" first="Mei-Shu" last="Chan">Mei-Shu Chan</name></noRegion><name sortKey="Huang, Shang Da" sort="Huang, Shang Da" uniqKey="Huang S" first="Shang-Da" last="Huang">Shang-Da Huang</name></country><country name="Taïwan"><noRegion><name sortKey="Huang, Shang Da" sort="Huang, Shang Da" uniqKey="Huang S" first="Shang-Da" last="Huang">Shang-Da Huang</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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