A highly selective procedure for the spectrophotometric determination of aluminium with 8-hydroxy-quinoline and its application to the determination of

Flow Injection Extraction Spectrofluorimetric Determination of Aluminium as the Tetraphenylphosphonium Aluminium(iii) 8-Hydroxyquinoline-5-Sulphonate

“…A masking procedure to eliminate the effects of the matrix iron under the working conditions was considered preferable to a prior separation. A procedure based on the manual extraction of Claassen, Bastings and Visser [11] was examined. In this procedure, iron (III) was first reduced to iron (II) and then converted to hexacyanoferrate (II).…”

“…For the analysis of steels EDTA may be added to prevent this hydrolysis and also to deal with other interferences. [10,11] It is essential that the reduction of Fe (III) is carried out before the addition of EDTA since it forms a stable complex with iron (III) that cannot easily be reduced. The presence of EDTA in solutions of pH>9.0 causes problems due to the formation of aluminium hydroxo EDTA complexes that only react slowly with 8-hydroxyquinoline or with 8-hydroxyquinoline-5-sulphonate, full complexation required 1 and 2 h respectively.…”

Photometric Determination of Aluminum and Titanium in Polyethylene

“…The method for the spectrophotometric determination of aluminum by measurement of the intensity of the yellow chloroform extract of the aluminum 8-quinolinolate has been reported (1,8). A number of metal ions may interfere but procedures have been developed which eliminate (7,12) or mask (5) this interference. The pH of the aqueous solution from which the aluminum 8-quinolinolate is extracted is an important factor in the determination (6).…”

Chemische Untersuchungen an Marschen I. Böden des Niederelbegebietes

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