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Postcolumn liquid chromatographic method for the determination of cyanide with fluorimetric detection

✍ Scribed by Keiji Gamoh; Senya Imamichi

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
369 KB
Volume
251
Category
Article
ISSN
0003-2670

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✦ Synopsis

A postcolumn liquid chromatographic procedure for the determination of cyanide with fluorimetric detection was developed. The method is based on both the separation of cyanide ion in the ion-exclusion mode and the postcolumn fluorescence derivatization of cyanide ion with o-phthalaldehyde or naphthalenedicarboxaldehyde in the presence of amino acid. Various parameters such as the kind of amino acid, pH of the reagent buffer and concentration of the sodium salt of EDTA were optimized to provide quantitative conversion of cyanide ion to the fluorescent derivative.

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An improved method for the determination of phytate (myo-inositol 1,2,3,5/4,6 hexakis (dihydrogen phosphate)) in plants is described. Phytate is extracted with 0.5 N HCI, purified and concentrated on an AG l-X8 anion-exchange resin, taken to dryness in a vacuum desiccator, and analyzed by reverse-ph