微量弗素定量法の比較検討

概要

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Colorimetric determination of a sample solution of NaF containing less than 10p.p.m. F- were made by use of a) ferric thiocyanate method, b) ferric salicylate method, c) thorium alizarin method, d) zirconium alizarin method, and e) aluminum hematoxylin method in the presence or absence of the disturbing ions. Within the range of showing linear transmittancy coefficient against the concentration, statistical interpretation of the result by Youden method was applied and found that the b) method was disturbed by CO--3, and that of the a) and c) methods by SO--4, The b) method was the most suitable for determination of less than 10p.p.m. F-, since this method required less time, reagents used are stable and the method has good accuracy and high sensitivity. Also, c) or d) method was suitable for determination of less than 5p.p.m. F-.
社団法人日本分析化学会の論文