吉林省不同区域毛樱桃中重金属的检测与分析

Detection and Analysis of Heavy Metals in Nanking Cherries from Different Regions of Jilin Province

摘要:

吉林省不同区域毛樱桃中包含铅（Pb）、镉（Cd）、铬（Cr）、铜（Cu）、锌（Zn）5种重金属，本实验通过原子吸收光谱法对五种金属进行含量测定。首先通过使用各种标准系列溶液，设定适当的仪器参数，得到线性方程和相关系数，测得精密度及回收率，最后测定样品重金属含量。实验结果表明，不同区域的毛樱桃重金属含量并不相同，长白山地区均低于长春、吉林、四平、白城和通辽地区；不同种植环境的毛樱桃重金属含量也不相同，城市绿化种植的毛樱桃重金属含量略高于野生毛樱桃重金属含量。铅的限量标准是0.1 mg/kg，镉的限量标准是0.05 mg/kg，锌的限量标准是5 mg/kg，铜的限量标准是10 mg/kg，铬的限量标准是0.5 mg/kg，不同区域被检测的毛樱桃重金属含量均低于国家限定标准，这一实验结果显示毛樱桃作为药食同源可以放心食用。

Abstract:

The cherries from different regions of Jilin Province contained five heavy metals: lead (Pb), cadmium (Cd), chromium (Cr), copper (Cu) and zinc (Zn). In this experiment, the contents of five metals were determined by atomic absorption spectrometry. First, by using a series of standard solutions and setting up instrument parameters, linear equations and correlation coefficients were obtained, and the precision, recovery and the heavy metal content of test samples were determined. The experimental results show that the content of heavy metals varied among the different regions, with that for the Changbai mountain area lower than those for Changchun, Jilin, Siping, Baicheng and Tongliao areas. Moreover, the heavy metal content in Nanking cherries from the different planting environments also differed, with heavy metal content for the urban cherries slightly higher than that for the wild cherries. The limits of lead, cadmium, zinc, copper and chromium were 0.1, 0.05, 5, 10 and 0.5 mg/kg, respectively. The heavy metal content of the tested cherries was lower than the national standard. The results of this experiment showed that the cherries are safe to eat as a homolog of medicine and food.