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Determination of arsenic in glycerine by hydride generation atomic absorption spectroscopy
Author(s) -
Ullman A. H.
Publication year - 1983
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02679798
Subject(s) - arsine , arsenic , atomic absorption spectroscopy , chemistry , hydrochloric acid , hydride , analytical chemistry (journal) , sodium borohydride , spectroscopy , absorption (acoustics) , inorganic chemistry , chromatography , organic chemistry , materials science , metal , catalysis , physics , quantum mechanics , phosphine , composite material
A rapid method for the determination of arsenic in glycerine is described. The glycerine sample is diluted and any arsenic present reacted with sodium borohydride and hydrochloric acid to give arsine gas. The evolved arsine is quantitated by atomic absorption spectroscopy in a quartz tube positioned in the flame of a commercial instrument. The method is faster than the colorimetric arsine method recommended by the United States Pharmacopeia and has a precision of 4.4% (RSD) at the 50 µg level (equal to 1.25 µg As/g glycerine).