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Comparative study of sodium borohydride tablet and tin(II) chloride reducing systems in the determination of mercury by atomic-absorption spectrophotometry

AAS-Bestimmung von Quecksilber. Vergleichende Untersuchung der Reduktion mit Natriumborhydrid oder Zinn(II)-Chlorid

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Zusammenfassung

Ein atomabsorptions-spektralphotometrisches Kaltdampf-Verfahren zur schnellen Quecksilberbestimmung wird beschrieben, das auf der Reduktion mit Hilfe der Natriumborhydridtablette und der Amalgamierung mit Gold beruht. Der Vergleich mit der Zinn(II)-Chloridmethode wird diskutiert. Genaue Ergebnisse werden durch einfaches Einhüllen der Reduktionstablette in ein Waffelblatt erzielt, wodurch der Reaktionsbeginn verzögert wird. In bezug auf Störelemente ergeben sich für beide Verfahren Vor- und Nachteile.

Summary

An atomic-absorption spectrophotometric method for the rapid and precise determination of mercury has been studied by using the sodium borohydride tablet reduction and cold-vapour atomicabsorption procedure coupled with amalgamation on gold. The comparison of the sodium borohydride tablet and tin(II) chloride solution reducing systems are described in detail. The use of the sodium borohydride tablet wrapped in a wafer sheet is very simple and gives more precise results. From the comparison of the effect of diverse ions, it is obvious that both reducing systems have their merits and demerits.

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References

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, Hiroshima University, Hiroshima 730, Japan

    Yuroku Yamamoto & Atsuo Shiraki

  2. Department of Environmental Science, Faculty of Integrated Arts and Sciences, Hiroshima University, Hiroshima 730, Japan

    Takahiro Kumamaru

Authors
  1. Yuroku Yamamoto
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  2. Takahiro Kumamaru
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  3. Atsuo Shiraki
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Yamamoto, Y., Kumamaru, T. & Shiraki, A. Comparative study of sodium borohydride tablet and tin(II) chloride reducing systems in the determination of mercury by atomic-absorption spectrophotometry. Z. Anal. Chem. 292, 273–277 (1978). https://doi.org/10.1007/BF00493694

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  • DOI: https://doi.org/10.1007/BF00493694

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