Spectrophotofluorimetric Determination of Trace Amounts of Aluminium with 2,2′-Dihydroxy-3,3′-dicarboxy-1, 1′-Dinaphthylmethane (Pamoic Acid)
作者:
E. Casassas,
A. Izquierdo-ridorsa,
L. García-Puignou,
J. Duñach,
期刊:
Analytical Letters
(Taylor Available online 1985)
卷期:
Volume 18,
issue 18
页码: 2239-2258
ISSN:0003-2719
年代: 1985
DOI:10.1080/00032718508068616
出版商: Taylor & Francis Group
关键词: Spectrophotofluorimetric Analysis;Aluminium
数据来源: Taylor
摘要:
Fluorescence properties of 2,2′-dihydroxy-3,3′-dicarboxy -1,1′-dinaphthylmethane (pamoic acid) and of its aluminium 1:1 complex are described. The fluorescence of the latter, as measured from a water-dioxane (3:7, v/v) solution, at pH 5.05–5.20, at room temperature, is used as a basis for a new method of aluminium determination at submicrogram level. Limit of quantification of the proposed procedure is 0.028 ng.ml−1, range of applicability goes up to 1.7 ug.ml−1, RSD is 1% at 0.47 ug.ml−1level (concentrations, given refer to HCl solution which is measured) Tolerance ratios for several interferent metal ions are given. A comparison is made with Kirkbright's method which uses 3-hydroxy-2-naphthoic acid as complexing agent: stability with time of the readings and freedom from Fe(III) interference are the main advantages of the proposed procedure. The new method is applied to the aluminium determination in atmospheric aerosol samples.
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