Abstract
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).
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References
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Ullman, A.H. Determination of arsenic in glycerine by hydride generation atomic absorption spectroscopy. J Am Oil Chem Soc 60, 614–615 (1983). https://doi.org/10.1007/BF02679798
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DOI: https://doi.org/10.1007/BF02679798