The kinetics and mechanisms of the reactions of aluminium(III) with gallic acid, gallic acid methyl ester and adrenaline

Selective Determination of Aluminum Bound with Tannin in Tea Infusion

“…The discovery of a possible correlation between the Al concentration in drinking water and the incidence of Alzheimer's disease has led to a renewed interest in the co-ordination chemistry of Al. [1][2][3][4][5][6] The bioavailability of Al is strictly linked to the distribution of the element among different chemical species. 3,7 The studies on speciation of Al in food samples are very limited, although there are many studies on the Al species in water samples.…”

“…Particularly strong chelate type complexes of Al may be formed with molecules containing oxygen donor functional groups. 19 Studies of spectrophotometric scanning 1,3,20 indicated that Al forms complexes with polyphenols. Nagata et al 21 studied Al forms in intact tea leaves by 27 Al-NMR spectroscopy.…”

“…Phenols form highly stable complexes with Al and this process makes Al more biological available. [1][2][3] If these polyphenols are decomposed in the gut, Al bound with tannin could become more bioavailable. 6 Studies on Al species under stomach conditions before and after gastrointestinal digestion were published.…”

“…Most studies on polyphenol-Al complexes were carried out using such model solutions. 1,3 Owen et al 10 used size exclusion chromatography coupled with ICP-MS to study the behaviors of Al in tea infusion before and after simulated gastrointestinal digestion and indicated that about 14% of the Al existed as stable species.…”

Non‐negativity constraints for elimination of multiple solutions in fitting of multivariate kinetic models to spectroscopic data

“…Selective UV/vis measurements at a single wavelength are by far the most common technique, but near-infrared (NIR), infrared (IR), Raman and diode array UV/vis spectroscopies have also been used to study reaction kinetics by fitting a kinetic model directly to multivariate spectral data [5][6][7][8][9].…”