Determination of Total Arsenic and Speciation in Apple Juice by Liquid Chromatography–Inductively Coupled Plasma Mass Spectrometry: An Experiment for the Analytical Chemistry Laboratory

Determination of Total Arsenic and Speciation in Apple Juice by Liquid Chromatography–Inductively Coupled Plasma Mass Spectrometry: An Experiment for the Analytical Chemistry Laboratory
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通过液相色谱法测定苹果汁中的总砷和形态 - 电感耦合等离子体质谱法:分析化学实验室的实验

DOI:
10.1021/acs.jchemed.6b00076
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发表时间:
2016
影响因子:
3
通讯作者:
Aga, Diana S.
Aga, Diana S.
中科院分区:
化学2区
文献类型:
--
作者:
He, Ping;Colón, Luis A.;Aga, Diana S.

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本实验分为两部分,旨在为高年级分析化学学生提供使用高效液相色谱法(HPLC)进行分离和电感耦合等离子体质谱法(ICP-MS)进行检测的实践经验。在实验的第一部分,学生们使用直接注射ICP-MS分析了从当地杂货店购买的苹果汁中的总砷。第二部分采用HPLC-ICP-MS法测定同一苹果汁样品中不同种类的砷。定量是基于两种方法,标准添加和外部校准曲线,以证明样品矩阵如何影响分析的准确性。实验提供了介绍和/或回顾几个基本分析化学概念的机会:色谱分离、质谱、电感耦合等离子体、基质效应、校准方法、内部标准和基本统计测试。布法罗大学仪器分析实验班的本科生在2015年春季学期成功地完成了这个实验。
A two-part laboratory experiment was designed for upper-level analytical chemistry students to provide hands-on experience in the use of high performance liquid chromatography (HPLC) for separation and inductively coupled plasma mass spectrometry (ICP-MS) for detection. In the first part of the experiment, the students analyze total arsenic in apple juice purchased from local grocery stores using direct injection ICP-MS. In the second part, different species of arsenic in the same apple juice samples are determined using HPLC–ICP-MS. Quantification is performed based on two methods, standard addition and external calibration curve, to demonstrate how sample matrix can affect the accuracy of the analysis. The experiments provide the opportunity to introduce and/or review several fundamental analytical chemistry concepts: chromatographic separations, mass spectrometry, inductively couple plasma, matrix effects, calibration methods, internal standard, and basic statistical tests. Undergraduate students enrolled in the Instrumental Analysis Laboratory class at the University at Buffalo performed this experiment successfully during the 2015 spring semester.
电感耦合等离子体原子发射光谱法测定烟草和卷烟灰中的痕量金属
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