摘要
建立微波消解作为前处理,用电感耦合等离子体-质谱(inductively coupled plasma mass spectrometry,ICP-M S)作为检测手段,同时测定陈醋中1 4种金属元素(A l、C r、F e、C o、C d、M n、C u、Z n、N i、A s、S e、Sn、Sb和Pb)的方法。通过考察硝酸和过氧化氢的配比对回收率的影响,确定微波消解的条件为7mL硝酸+1mL过氧化氢。14种元素具有良好的线性关系(相关系数r≥0.999),方法的检出限的范围是0.003～1.035mg/L,平均回收率在80.03%～121.13%之间,相对标准偏差在1.68%～16.78%之间。检测3种不同包装(塑料、玻璃和陶瓷)的老陈醋的金属元素的含量,结果表明不同包装的山西老陈醋中同种金属元素的含量有较大差异。.
A method for the simultaneous determination of 14 trace elements（Al,Cr,Fe,Co,Cd,Mn,Cu,Zn,Ni,As,Se,Sn,Sb and Pb） in Chinese mature vinegar was developed by microwave digestion followed by inductively coupled plasma mass spectrometry（ICP-MS）.The best results for the recovery of the analytes were obtained employing a digestion system composed of 7 mL of nitric acid and 1 mL of hydrogen peroxide.Good linear relationship was found for all the elements（r ≥ 0.999）.The detection limits of the method ranged from 0.003 mg/L to 1.035 mg/L.The average recoveries were 80.03%-121.13%,with a relative standard deviation of 1.68%-16.78%.Significant differences in the content of each trace element were found among three commercial vinegar samples packaged with plastic,glass and ceramic materials,respectively.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2011年第24期237-240,共4页
Food Science
基金
山西省高校科技开发项目(2010102)
关键词
陈醋
微波消解
电感耦合等离子质谱(ICP-MS)
金属元素
mature vinegar
microwave digestion
inductively coupled plasma-mass spectrometry（ICP-MS）
trace metal elements
