Maiga Ababacar, Diallo Drissa, Bye Ragnar, Paulsen Berit Smestad
Department of Traditional Medicine, BP 1746, Bamako, Mali.
J Agric Food Chem. 2005 Mar 23;53(6):2316-21. doi: 10.1021/jf040436o.
Plants are used in different ways in Mali, among those as medicine and as food. The monitoring of metals in the plants is of great importance for protecting the public from the hazards of possible toxic effects and also for informing the population about the nutritional value of the plants. The concentrations of some toxic and essential metal ions were surveyed in seven medicinal and edible plants from Mali. Dry ashing of the plant material and subsequent use of atomic absorption spectrophotometry were the analytical methodologies used. Iron, manganese, and zinc were found in high concentrations in some of the plants, i.e., 1.4 and 1.5 mg/g iron in Cuminum cyminum and Bombax costatum, respectively, 243 microg/g manganese in Hibiscus sabdariffa, and 62.8 and 67.1 microg/g zinc in Spilanthes oleracaea and B. costatum, respectively, whereas cobalt and cadmium were not detected in any of the plant material studied. The other ions detected, Cr, Ni, Pb, and Cu, were present in minor amounts, in the ranges of 2.2-17.2 microg/g for Cr, 1.6-8.1 microg/g for Ni, 0.7-5.2 microg/g for Pb, and 2.4-17.1 microg/g for Cu. From a toxicological point of view, none of these plants would be harmful for the user by taking in the plant material in the traditional manner, which is preparing an infusion of the plant using amounts not adding up to those necessary to reach a harmful level of the metal ions detected. The plants B. costatum and C. cyminum could be of interest as sources for iron for humans in the case of too low of a level of hemoglobin.
在马里，植物有着不同的用途，其中包括用作药物和食物。监测植物中的金属对于保护公众免受可能的毒性影响危害以及让人们了解植物的营养价值至关重要。对马里的七种药用和食用植物中的一些有毒和必需金属离子浓度进行了调查。采用的分析方法是将植物材料干灰化，随后使用原子吸收分光光度法。在一些植物中发现铁、锰和锌的浓度较高，即孜然芹和木棉中分别含有1.4和1.5毫克/克的铁，玫瑰茄中含有243微克/克的锰，刺毛头菊和木棉中分别含有62.8和67.1微克/克的锌，而在所研究的任何植物材料中均未检测到钴和镉。检测到的其他离子，铬、镍、铅和铜，含量较少，铬的含量范围为2.2 - 17.2微克/克，镍为1.6 - 8.1微克/克，铅为0.7 - 5.2微克/克，铜为2.4 - 17.1微克/克。从毒理学角度来看，以传统方式摄入这些植物材料（即使用植物制备浸液，使用量未达到检测到的金属离子有害水平所需量），这些植物对使用者都不会有害。在血红蛋白水平过低的情况下，木棉和孜然芹这两种植物可能作为人类铁的来源而受到关注。
