微波消解-火焰原子吸收光谱法测定肉桂及肉桂粕中的微量元素  

Determination of Trace Elements in Cinnamon and Cinnamon Dregs by Microwave Digestion-FAAS Method

作　　者：贾春晓[1] 朱永华[1] 王莹莹[2] 毛多斌[2] 

机构地区：[1]郑州轻工业学院材料与化学工程学院,郑州450002 [2]郑州轻工业学院食品与生物工程学院,郑州450002

出　　处：《中国调味品》2013年第9期92-95,共4页China Condiment

基　　金：河南省科技攻关项目(424070106)

摘　　要：采用微波消解-火焰原子吸收光谱（RU峪）法对内桂及肉桂粕（从肉桂中萃取精油后剩余的残潦）中的微量元素进行测定。对微波消解条件及消解程序进行优化，并结合FAAS法测定肉桂及肉桂粕中Ca，Mg，Cu，Zn，Fe和Mn6种元素的含量。结果表明，微波消解的最佳条件：肉桂和肉桂粕均采用HNCh-H202混酸体系，配比分别为5：3和5；2，固液比分别为1：20和1l28，最高功率（700W）时的保温时间均为6rnin。所建立的定量分析方法回收率为95．58％～101．64％，相对标准偏差小于3．O％，线性相关系数大于0．999，方法检出限为0．18-2．20ng／mL,肉桂及肉桂粕中均含有丰富的微量元素，与肉桂相比，肉桂粕中Fe，Mn和M_g元素含量稍有降低，而Ca，Cu和Zn的含量有所提高。A method for determination of trace elements in cinnamon and cinnamon dregs（the residue of cinnamon after extracting the oil）by microwave digestion-FAAS is developed. The conditions and procedures of microwave digestion of samples are optimized. The contents of trace elements including Ca, Mg, Cu, Zn, Fe and Mn are determined by FAAS method. The results show that the optimum conditions of microwave digestion are as follows： cinnamon and cinnamon dregs are digested with HNO3-H=Oz and the volume ratios of HNO3-H2O2 are 5 = 3 and 5 = 2 respectively, the ratios of solid/ liquid are 1 ： 20 and 1： 28 respectively, the maximum power is 700 W, the digestion time are all 6 min. The recoveries of the method are 95.58%--101.64% , the relative standard deviations （RSD）are less than 3.0%, the correlation coefficients are more than 0. 999 and the detection limits are0.18＂~2. 20 ng/mL. The trace elements are rich in cinnamon and cinnamon dregs. The contents of Fe, Mn and Mg in cinnamon dregs are a little lower than those in cinnamon and the contents of Ca, Cu and gn in cinnamon dregs are higher than those in cinnamon.

关 键 词：微波消解 火焰原子吸收光谱法 肉桂及肉桂粕 微量元素 

分 类 号：TS207.3[轻工技术与工程—食品科学]