Selenium has been determined in different parts of the Lecythis ollaria (LO) plant (Venezuela) and the determination of its speciation has been achieved in fruit seeds. The study has been performed using different analytical techniques including inductively coupled plasma atomic emission spectrometry (ICP-AES), differential pulse cathodic stripping voltammetry (DPCSV), instrumental neutron activation analysis (INAA), high performance liquid chromatography (HPLC) and mass spectrometry (MS). Different parts of the plant (leaves, bark, capsules and seeds) were examined as well as the soil where LO was growing. Among different considered parts, seeds show the highest content in selenium ( congruent to 5 g kg(-1)) which is dependent on the maturation extent of the fruit. In seeds, about half of the total selenium content is soluble in water while the remaining is involved in protein structure. In the aqueous fraction, the prevailing form of selenium appears to be selenocystathionine with much lower amounts of Se(VI) and Se(IV). (C) 2004 Elsevier B.V. All rights reserved.
Distribution and speciation of selenium in Lecythis ollaria plant / Ferri, Tommaso; Coccioli, Franco; C., De Luca; C. V., Callegari; R., Morabito. - In: MICROCHEMICAL JOURNAL. - ISSN 0026-265X. - 78:2(2004), pp. 195-203. [10.1016/j.microc.2004.06.001]
Distribution and speciation of selenium in Lecythis ollaria plant
FERRI, Tommaso;COCCIOLI, Franco;
2004
Abstract
Selenium has been determined in different parts of the Lecythis ollaria (LO) plant (Venezuela) and the determination of its speciation has been achieved in fruit seeds. The study has been performed using different analytical techniques including inductively coupled plasma atomic emission spectrometry (ICP-AES), differential pulse cathodic stripping voltammetry (DPCSV), instrumental neutron activation analysis (INAA), high performance liquid chromatography (HPLC) and mass spectrometry (MS). Different parts of the plant (leaves, bark, capsules and seeds) were examined as well as the soil where LO was growing. Among different considered parts, seeds show the highest content in selenium ( congruent to 5 g kg(-1)) which is dependent on the maturation extent of the fruit. In seeds, about half of the total selenium content is soluble in water while the remaining is involved in protein structure. In the aqueous fraction, the prevailing form of selenium appears to be selenocystathionine with much lower amounts of Se(VI) and Se(IV). (C) 2004 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
