期刊
MICROCHIMICA ACTA
卷 152, 期 1-2, 页码 61-68出版社
SPRINGER WIEN
DOI: 10.1007/s00604-005-0424-6
关键词
beer; trace elements; ICP-AES; direct analysis
A very simple method for determination of trace amount of Cu, Mn and Fe in beer by inductively coupled plasma spectrometry (ICP-AES) was developed. The beer was directly introduced into the plasma, without dilution or adding of reagents, via a conventional V-groove nebulizer. The only sample preparation used was degassing of the beer to remove CO2. By optimizing the ICP-AES parameters (RF power and Nebulizer gas flow rate) and by the appropriate choice of wavelengths for measurements, sufficient accuracy for the determination of the trace metals was obtained. Various types of beers were analysed by the direct ICP-AES method and for comparison, also with two other methods: by GFAAS and ICP-AES after decomposition. No significant difference was found for Cu and Mn (ANOVA, 95% confidence level) using the three methods. This was normally also the case for Fe; only in one case did the result of Fe by the direct method deviate from the other methods (10% lower results). The limit of detection for the direct method was estimated to 1.1, 0.3, and 1.1 ng mL(-1) for Cu, Mn, and Fe, respectively.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据