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Determination of trace metals in bulgarian lavender oil by electrothermal atomic absorption spectrometry / Stanislav R. Bozhanov in The journal of essential oil research, Vol. 20 n°6 (Novembre/Décembre 2008) 

Public ISBD [article]  in The journal of essential oil research > Vol. 20 n°6 (Novembre/Décembre 2008) . - pp. 549-555 Titre : Determination of trace metals in bulgarian lavender oil by electrothermal atomic absorption spectrometry Type de document : texte imprimé Auteurs : Stanislav R. Bozhanov, Auteur ; Irina B. Karadjova, Auteur Année de publication : 2009 Article en page(s) : pp. 549-555 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Lavandula  angustifolia  Lamiaceae  Lavender  oil  Trace  element  determination Résumé : An accurate, reliable and fast procedure for the direct Electrothermal Atomic Absorption Spectrometry (ETAAS) determination of a number of trace metals (Bi, Cd, Cr, Cu, Fe, Mn, Ni, Pb and Sb) in lavender oil has been developed. Sample preparation consists of simple diluting of lavender oil 1+1 or 1+2 m/m with isopropanol or 1,4-dioxane. Pyrolytic graphite tubes, W-impregnated tubes and pyrolytic graphite tubes coated with Pt are proposed as atomizers for correct direct ETAAS measurement of studied elements. Calibration curves prepared with aqueous standards diluted in the respective organic solvent are recommended for the quantification of trace elements in lavender oil. The detection limits achieved are well below the maximum permissible concentrations for the studied elements in cosmetic or food products. Within-run and between-run precisions are between 2–7% and 3–10%, respectively at trace levels: Cd (0.5–5 ng/g); Bi, Cr, Cu, Ni, Sb, Pb (1–50 ng/g) and Fe, Mn (20–1000 ng/g). The trace element content in 10 Bulgarian lavender oils is presented. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2008.9700086 [article] Determination of trace metals in bulgarian lavender oil by electrothermal atomic absorption spectrometry [texte imprimé] / Stanislav R. Bozhanov, Auteur ; Irina B. Karadjova, Auteur . - 2009 . - pp. 549-555. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 20 n°6 (Novembre/Décembre 2008) . - pp. 549-555 Mots-clés : Lavandula  angustifolia  Lamiaceae  Lavender  oil  Trace  element  determination Résumé : An accurate, reliable and fast procedure for the direct Electrothermal Atomic Absorption Spectrometry (ETAAS) determination of a number of trace metals (Bi, Cd, Cr, Cu, Fe, Mn, Ni, Pb and Sb) in lavender oil has been developed. Sample preparation consists of simple diluting of lavender oil 1+1 or 1+2 m/m with isopropanol or 1,4-dioxane. Pyrolytic graphite tubes, W-impregnated tubes and pyrolytic graphite tubes coated with Pt are proposed as atomizers for correct direct ETAAS measurement of studied elements. Calibration curves prepared with aqueous standards diluted in the respective organic solvent are recommended for the quantification of trace elements in lavender oil. The detection limits achieved are well below the maximum permissible concentrations for the studied elements in cosmetic or food products. Within-run and between-run precisions are between 2–7% and 3–10%, respectively at trace levels: Cd (0.5–5 ng/g); Bi, Cr, Cu, Ni, Sb, Pb (1–50 ng/g) and Fe, Mn (20–1000 ng/g). The trace element content in 10 Bulgarian lavender oils is presented. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2008.9700086