On-line aluminium preconcentration on chelating resin and its FIA-spectrofluorimetric determination in foods and dialysis concentrates

Contribution of the raw material to the aluminum contamination in parenterals

“…[5][6][7][8] Studies have shown that aluminum is found in practically all products for parenteral nutrition, 9,10 amino acid formulations, and glucose and lipid emulsions. Aluminum is also present in saline concentrates for hemodialysis treatment [11][12][13] and other products used parenterally such as solutions of KCl, NaCl, insulin, 14 and albumin. 15 The American Societies for Clinical Nutrition (ASCN) and for Parenteral and Enteral Nutrition (A.S.P.E.N.)…”

Assay of plant tissues for elemental content by flow injection analysis

“…The authors overturned the original idea of the detectors being unmoving units and relocated a spectrophotometer between two different analytical channels for the parallel monitoring of both analytes in two different sample plugs. The spectrophotometer wavelength was 530 nm and Al and Fe were determined as a Al-Eriochrome Reisetal., 1979Zagatto et al, 19S1 Jacintho et al, 1981aFernández et al, 1991Zagatto et al, 1992Saraswati and Watters, 1994 Jiménez de Blas and Mateos, 1996 Krug et al, 1981Jacintho et al, 1981a Amida and Zagatto, 1987Andrade et al, 1988Lopez-Garcia et al, 1988Nogueira et al, 1993Cairero et al, 1993Jacintho et al, 1981aWelz et al, 1991 Cyanine R and ferroin complex after addition of the appropriate reagent solutions. An injector-commutator was used to introduce the two sample plugs into the different analytical manifolds and to transfer the detector between the Fe and the Al channels.…”

“…The determination of Al in tap water, food samples, and dialysis solutions was described by Fernández et al (1991), detailing a new sensitive and selective flow injectionprocedure with on-line preconcentration. The method was based on the separation of the .element in a chelating microcolumn (Chromotrope 2B immobilized on ÁG1-X8 anion-exchange resin) incorporated in the flow system to remove interferences and preconcentrate Al (at least 10-fold), followed by a spectrofluorimetric determination of the complex Al(III)-5,7-dibromo-8-quinolinol extracted "into diethylether.…”

Separation/Preconcentration Methods for the Determination of Aluminum in Dialysate Solution and Scalp Hair Samples of Kidney Failure Patients

“…We preferred to stop the reaction at 20 min, as a longer reaction time did not increase fluorescence intensity and percent recovery of Al 3+ . Despite continued research, the application of morin remains limited since the very long reaction time with Al 3+ makes automation difficult [33].…”