摘要
此次试验旨在建立一种可靠的微波消解-电感耦合等离子体发射光谱(ICP-OES)法测定辣条中10种金属元素的方法。试验对仪器参数进行优化,随机购买市售50份样本,打碎混匀后,用微波消解-ICP-OES法对锰、铜、铁、铝、铅、银、镉、钼、镍、铬10种元素进行同时测定。结果表明,在优化试验条件下,各金属元素的线性关系良好,相关线性(r^2)在0.9998以上,方法的检出限为0.034~0.646 mg/kg。在加标量为0.005,0.010和0.020 mg/kg的3种梯度浓度下,回收率达到90.0%~102.0%,方法精密度RSD为0.82%~7.71%。该方法样品处理效率高,样品消解彻底,操作简单快速,谱线干扰少,线性范围宽,灵敏度高,能满足辣条样品中多种金属元素的同时测定。
To establish a method for the determination of ten metallic elements in spicy gluten sticks by microwave digestion and inductively coupled plasma spectroscopy(ICP-OES),instrumental parameters were optimized and fifty samples were crushed and mixed.After microwave digestion,the concentrations of Mn,Cu,Fe,Al,Pb,Ag,Cd,Mu,Ni and Cr were determined by ICP-OES.The results showed that standard curves for these elements were obtained with correlation coefficients greater than 0.9998.The detection limits of the method were in the range of 0.034-0.646 mg/kg,and the spike recoveries at three different replicates of 0.005,0.010 and 0.020 mg/kg were 90.0%-102.0%with the RSD varied from 0.82%to 7.71%.The method which has less interference in spectral range is proved to be simple,rapid,sensitive and accurate.Ten metals in in spicy gluten sticks could be determined simultaneously by this method.
作者
李梦洁
LI Mengjie(Shanghai Denuo Product Testing Service Co.,Ltd.,Shanghai 200436)
出处
《食品工业》
CAS
北大核心
2020年第4期285-288,共4页
The Food Industry
