Levels of major and trace metals in the leaves and infusions of <i>Croton macrostachyus</i>

Abstract

ABSTRACT. The levels of essential metals (Ca, Mg, Fe, Mn, Zn, Cu, Co, Cr, Ni) and toxic metals (Cd, Pb) were determined in the leaves of Croton macrostachyus (traditional medicinal plant) collected from four different regions of Ethiopia (Akaki, Abomsa, Bonga and Dilla) and also in the infusions of leaves collected from Akaki using flame atomic absorption spectrometry. An optimized digestion procedure took 2.5 h for the digestion of 0.5 g of powdered sample with 2 mL of HNO3 and 2 mL of HClO4 at 270 o C while 2 h were needed to digest 25 mL infusion with 4 mL of HNO3 and 1 mL HClO4. The recoveries of metals were in the range 92-103% for the leaves powder and 94-105% for the infusion samples.

Levels of essential and non-essential metals in ginger (Zingiber officinale) cultivated in Ethiopia

“…Some studies have been carried out on levels of essential and non-essential metals in some spices and medicinal plants cultivated in Ethiopia (Derbie and Chandravanshi 2011; Gebre and Chandravanshi 2012; Kitata and Chandravanshi 2012; Weldegebriel et al 2012; Aregahegn et al 2013; Mekebo and Chandravanshi 2014; Endalamaw and Chandravanshi 2015; Dubale et al 2015). Some studies have also been conducted on determination of essential and non-essential metal levels of ginger in Nigeria (Obiajunwa et al 2002; Ogunwandea and Olawore 2004; Aiwonegbe and Ikhuoria 2007), India (Devi et al 2008), and Saudi Arabia (Al-Eed et al 2002; Alwakeel 2008).…”

Levels of selected metals in leaves of Cannabis sativa L. cultivated in Ethiopia

“…Recently some studies have been carried out on levels of essential and non-essential metals in a psychoactive khat leaves (Atlabachew et al 2010) and some medicinal plants cultivated in Ethiopia (Derbie and Chandravanshi 2011; Gebre and Chandravanshi 2012; Aregahegn et al 2013; Mekebo and Chandravanshi 2014; Endalamaw and Chandravanshi 2015; Dubale et al 2015; Wagesho and Chandravanshi 2015). …”

Mineral Contents of Selected Medicinal and Stimulating Plants in Ethiopia

“…The levels of the major (Ca, K, Na, Mg), trace (Fe, Cr, Ni, Zn, Mn, Cu, Co), and toxic (Pb, Cd) metals in the seeds of fenugreek cultivated in different regions of Ethiopia were determined by flame atomic absorption spectrophotometry. Thirteen elements were determined, obtaining concentrations (mg kg (4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15). The study showed that fenugreek seeds were a good source of essential metals.…”

“…The levels of essential and non-essential metals in linseed samples collected from five different sites (Bale, East Gojam, Shoa, South Wello and Tigray) in Ethiopia were determined by flame atomic absorption spectrometry. The levels (mg kg -1 ) of metals determined were in the ranges Na (242-614), K (6,494-6,755), Mg (2,679-3,118), Ca (540-744), Cr (13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30), Mn (17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28), , Co (23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35)(36)(37)(38)(39)(40)(41)(42), Ni (12-...…”

“…The levels of essential metals (Ca, Mg, Fe, Mn, Zn, Cu, Co, Cr, Ni) and toxic metals (Cd, Pb) were determined in the leaves of Croton macrostachyus (traditional medicinal plant) collected from four different regions of Ethiopia (Akaki, Abomsa, Bonga and Dilla) and also in the infusions of leaves collected from Akaki using flame atomic absorption spectrometry. The mean concentration ranges (µg/g) were Ca (5,823-12, [15]. different countries around the world for different purposes, such as medicinal uses (anti-diabetic, lowering the blood sugar and cholesterol levels, anti-cancer, anti-microbial, against breast cancer, avoiding blood poisoning from wounds, making food (stew with rice in Iran, flavoring cheese in Switzerland, syrup and bitter rum in Germany, mixed seed powder with flour for making flat bread in Egypt, curries, dyes, young seedlings for eating as a vegetable), roasted grain as a coffee-substitute (in Africa), controlling insects in grain storages and perfume industries.…”