湿法消解-石墨炉原子吸收光谱法测定山茶油中的镉  

Determination of Cadmium in Tea-Camellia Seed Oil by Wet Digestion-Graphite Furnace Atomic Absorption Spectrometry

作　　者：倪张林[1,2] 汤富彬[1,2] 屈明华[1,2] 沈丹玉[1,2] 莫润宏[1,2] 

机构地区：[1]中国林业科学研究院亚热带林业研究所 [2]国家林业局经济林产品质量检验检测中心(杭州),浙江富阳311400

出　　处：《中国无机分析化学》2011年第3期66-68,共3页Chinese Journal of Inorganic Analytical Chemistry

基　　金：中央级公益性科研院所基本科研业务费专项资金(RISF6151)

摘　　要：《食用油卫生标准》GB2716-2005中对重金属铅和砷都有明确的限量规定（小于0.1 mg/kg）,但对于镉元素并没有限量规定。为此,选取目前较为热门的山茶油,建立硝酸和过氧化氢为酸体系,湿法消解-石墨炉原子吸收光谱法测定其中镉的含量,通过对山茶油的毛油和精炼油的测定,均有检出,与已报道的其它植物油中含量水平相当;方法的检出限为0.058μg/kg,RSD为12%,回收率为84%~103%。方法可靠,灵敏度高。Although there is a clear definition for the threshold limit of lead （Pb） and arsenic（As） in vege- table oil which is d0.1 mg/kg in GB2716--2005,no threshold limit for cadmium was given in this standard. In this study, tea-camellia seed oil which is popularly studied was chosen and investigated. A new method using wet digestion-graphite furnace atomic absorption spectrometry was established in which HNO3 and H2O2 is used as the acidic system. The content of cadmium in the crude and refined tea-camellia seed oil were determined by the method. The results matched with those for other plant oils reported pre- viously. The detection limit, RSD and recovery rate of this method is 0. 058μg/L, 12%, and in the range of 84%-103%, respectively. Thus it concluded that this method is reliable and has high sensitivity.

关 键 词：山茶油 镉 湿法 石墨炉原子吸收光谱法 

分 类 号：O657.31[理学—分析化学] TH744.125[理学—化学]