电感耦合等离子体质谱法(ICP-Mass)同时测定菊花中多种微量元素

用原子吸收光谱法(AAS)和电感耦合等离子体质谱法(ICP-Mass)分别测定菊花中微量元素锌、铜、铁,采用的定量分析方法是标准曲线法。并对两种仪器分析方法所得结果进行了比较。结果表明,随锌、铜、铁变量,AAS法和ICP-Mass法均有较好的线性关系,且测定的结果相近。两种方法最低检出限量分别为,AAS法铁0.4mg/L、铜0.4mg/L、锌0.08mg/L;ICP-Mass法铁0.0008mg/L、铜0.0008mg/L、锌0.0008mg/L。与AAS法技术相比,ICP-Mass技术将ICP的高温电离特性与四极杆质谱计的灵敏快速扫描的优点相结合,ICP-MS技术提供了最低的检出限,最宽的动态线性范围,且谱线简单、干扰少,分析精密度高,所以ICP-Mass法的准确度更高。ICP-Mass法可以同时测定菊花中的多种微量元素,分析周期短,提高了样品的分析效率。显示该方法快速、准确、简便等的优点。而AAS法一次只能分析单个元素。

Simultaneous determination of multiplex trace elements in chrysanthemum by ICP-Mass

Trace element Zn,Cu and Fe content in chrysanthemum were determined by both atomic absorption spectrometry(AAS)and inductively coupled plasma mass-spectrography(ICP-Mass).Three elements content in chrysanthemum was determined by standard curve method.The results obtained from two instrumental analysis methods were compared.The results show that the linear calibration curves for AAS and ICP-Mass were good,the measurement results by both methods were near.The lowest detection limits of Fe,Cu and Zn were 0.4mg/L,0.4mg/L and 0.08mg/L respectively by AAS.The lowest detection of limits of Fe,Cu,Zn were 0.0008mg/L,0.0008mg/L and 0.0008mg/L respectively by ICP-Mass.ICP-Mass was unique technology in which high-temperature ionization of ICP was combined with advantages of sensitive,quick and scanning of quadrupole mass spectrometer.ICP-Mass provided the lowest detection limit,the widest dynamic range linear.The analysis line of ICP-Mass was simple so that interference was low.The accurate and precision of ICP-Mass was higher than AAS.Simultaneous determination of multiplex trace elements in chrysanthemum by ICP-Mass.ICP-Mass was advantages of short period,high efficiency of analysis.The method was accurate,quick-acquired and convenient.But only one element was analysed by AAS per time.