Improved determination of manganese in hair by use of a mini-autoclave and flameless atomic absorption spectrometry with Zeeman background correction: an evaluation in unexposed subjects.

摘要: Motivated by the relatively wide range of values published hitherto, we offer a new, reliable method for determination manganese in hair from unexposed human subjects. By using mini-autoclave, have developed that obviates loss during digestion and, thanks to use Teflon receptacle and rigorous methodology, contamination has been minimized. We used Zeeman flameless atomic absorption spectrometry, with standard additions, quantification. Within-run CVs concentrations Mn 0.26 0.28 microgram/g dry were 3.63 3.93%; day-to-day CV concentration 0.29 was 5.84%. Mean (+/- SD) analytical recovery added samples 104% 9.2%). The mean found 15 healthy subjects 0.05) weight. This sensitive, reproducible procedure is suitable analysis traces hair.