A method is presented for the detection of a trace amount of cyanocobalamin (vitamin B) using a combination of solid-phase extraction and the measurement of cobalt in vitamin B by a portable total-reflection X-ray fluorescence spectrometer. Using this combination, a detection limit of 1 ng/mL was achieved for vitamin B.
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| http://dx.doi.org/10.2116/analsci.18P330 | DOI Listing |
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