摘要
海带样品经智能加热器预消解,再经微波消解,利用电感耦合等离子体质谱法,分别采用外标法和内标法对海带中的铅、镉、铬、铜和锌含量进行测定。结果显示:内标法是一种较好的方法,各元素线性范围均为0～50μg/L,相关系数均在0.9998以上,加标回收率为91.2%～107%,相对标准偏差均小于5%,方法检出限为0.3～1.9μg/kg。该方法能够简单、快速、灵敏和准确地测定海带中的重金属元素。
Inductively coupled plasma mass spectrometry（ICP-MS） with smart heater pre-digestion and microwave digestion was applied to determine lead,cadmium,chromium,copper and zinc in kelp.We compared the results obtained for the contents of the five metal elements by an external standard method and an internal standard method.The results indicate that the internal standard method was better and exhibited a linear range of 0-50 μg/L for each metal element（r 0.9998） with a RSD less than 5%.The limits of detection for these metal elements were 0.3-1.9 μg/kg.It allowed simple,rapid,sensitive and accurate determination of heavy metal elements in kelp.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2012年第20期286-288,共3页
Food Science
关键词
海带
重金属
微波消解
电感耦合等离子体质谱
kelp
heavy metal elements
microwave digestion
inductively coupled plasma mass spectrometry
