Effect of temperature on generation and decomposition of the group Vb element hydrides and estimation of the kinetic stability of gaseous bismuth hydride by atomic-absorption spectrometry.
During work on atomic-absorption determination of arsenic, antimony and bismuth by the hydride-generation method with sodium tetrahydroborate, the thermal and kinetic stabilities of the hydrides at various generation temperatures were studied. The arsenic and antimony hydrides are very stable even at 40 degrees but bismuth hydride is very unstable both thermally and kinetically, even at 25 degrees . The approximate rate constants for the decomposition of gaseous bismuth hydride at 0, 10, 25 and 40 degrees were found to be 0.05, 0.10, 0.24 and 0.29min(-1) respectively.
Fujita
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Department of Chemistry, College of Science, Rikkyo (St Paul's) University, Nishi-Ikebukuro, Toshima-ku, Tokyo 171, Japan.
Takada
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