Selective determination of trace arsenic and antimony species in natural waters by gas chromatography with a photoionization detector

Masahiro Yamamoto, Shigeru Tanaka, Yoshikazu Hashimoto

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Traces amounts of arsenic and antimony in water samples were determined by gas chromatography with a photoionization detector after liquidnitrogen cold trapping of their hydrides. The sample solution was treated with sodium hydroborate (NaBH4) under weak‐acid conditions for arsenic(III) and antimony(III) determination, and under strong‐acid conditions for arsenic(III+V) and antimony(III+V) determination. Large amounts of carbon dioxide (CO2) and water vapor obscured determination of arsine and stibine. Better separation from interference could be achieved by removing CO2 and water vapor in two tubes containing sodium hydroxide pellets and calcium chloride, respectively. The detection limits of this method were 1.8 ng dm−3 for arsenic and 9.4 ng dm−3 for antimony in the case of 100‐cm3 sample volumes. Therefore, it is suitable for determination of trace arsenic and antimony in natural waters.

Original languageEnglish
Pages (from-to)351-356
Number of pages6
JournalApplied Organometallic Chemistry
Volume6
Issue number4
DOIs
Publication statusPublished - 1992 Jul

Keywords

  • Photoionizaton detector
  • antimony
  • arsenic
  • arsine
  • gas chromatography
  • hydride generation
  • natural waters
  • stibine

ASJC Scopus subject areas

  • Chemistry(all)
  • Inorganic Chemistry

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