微波消解-ICP-OES法测定粉条中的有害金属元素  

Determination of Hazardous Metal Elements in Vermicelli by Microwave Ablation-ICP-OES Method

作　　者：张珮洁 ZHANG Peijie(Denuo Product Testing Co.,Ltd.,Shanghai 200436)

机构地区：[1]上海德诺产品检测有限公司,上海200436

出　　处：《食品工业》2023年第8期301-304,共4页The Food Industry

摘　　要：为确立一种准确可靠又较为便捷的测定粉条中的有害金属元素的方法,将样品烘干后使用微波消解,经过赶酸定容后过滤,使用电感耦合等离子体发射光谱法(ICP-OES)对其进行测定。随机购买线上和线下50份样品进行测试,对消解升温步骤与仪器条件进行优化,同时测定铝、铅、镉、砷4种有害金属元素。结果表明,在前处理使用微波消解的条件下,4种元素的线性回归方程呈线性良好,线性(R2)在0.9995及以上,方法检出限为0.042~0.500 mg/kg。经过三水平加标测试(Pb、Cd、As加标梯度为0.05,0.15和0.4 mg/kg;Al加标梯度为0.10,0.50和1.00 mg/kg),回收率为90.0%~108.0%。方法精密度SRSD在1.02%~4.71%内,该方法前处理简便、样品消解完全、操作步骤易懂、机器灵敏度高,能够满足粉条样品同时进行多元素测定。In order to establish an accurate,reliable and convenient method for the determination of hazardous metal elements in vermicelli,samples were dried and filtered after microwave digestion and acid-driven fixation,and measured using inductively coupled plasma emission spectrometry(ICP-OES).Fifty samples from the top and bottom of the line were randomly purchased for testing,and the digestion temperature rise steps and instrument conditions were optimized for the simultaneous determination of four hazardous metal elements(aluminum,lead,cadmium and arsenic).The results showed that the linear regression equations of the four elements were linearly good with linearity(R2)at 0.9995 and above,and the method detection limits were 0.042-0.500 mg/kg under the conditions of pre-treatment using microwave digestion.The spiked recoveries(The spiked concentrations of Pb,Cd and As were 0.05,0.15 and 0.4 mg/kg;The spiked concentration of Al was 0.10,0.50 and 1.00 mg/kg)were 90.0%-108.0%.The method was simple in pre-treatment,complete sample digestion,easy to understand operation steps and high machine sensitivity,which could meet the simultaneous multi-element determination of vermicelli samples.

关 键 词：电感耦合等离子体发射光谱仪 有害金属元素 粉条 

分 类 号：O657.31[理学—分析化学] TS236.5[理学—化学]