食品科学 ›› 2011, Vol. 32 ›› Issue (24): 237-240.doi: 10.7506/spkx1002-6630-201124050

• 分析检测 • 上一篇    下一篇

电感耦合等离子体-质谱法测定陈醋中14种微量金属元素

陈月1,林勤保1,*,吴海军2,宋欢2,郭小喜2   

  1. 1. 山西大学应用化学研究所
    2.山西出入境检验检疫局
  • 出版日期:2011-12-25 发布日期:2011-12-29
  • 基金资助:
    山西省高校科技开发项目(2010102)

Determination of Fourteen Trace Metal Elements in Mature Vinegar by Inductively Coupled Plasma Mass Spectrometry (ICP-MS)

CHEN Yue1,LIN Qin-bao1,*,WU Hai-jun2,SONG Huan2,GUO Xiao-xi2   

  1. (1. Institute of Applied Chemistry, Shanxi University, Taiyuan 030006, China; 2. Shanxi Entry-Exit Inspection and Quarantine Bureau, Taiyuan 030024, China)
  • Online:2011-12-25 Published:2011-12-29

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-MS)作为检测手段,同时测定陈醋中14种金属元素(Al、Cr、Fe、Co、Cd、Mn、Cu、Zn、Ni、As、Se、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。.

关键词: 陈醋, 微波消解, 电感耦合等离子质谱(ICP-MS), 金属元素

Abstract: 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.

Key words: mature vinegar, microwave digestion, inductively coupled plasma-mass spectrometry (ICP-MS), trace metal elements

中图分类号: