Integrating Elemental Analysis and Chromatography Techniques by Analyzing Metal Oxide and Organic UV Absorbers in Commercial Sunscreens
Integrating Elemental Analysis and Chromatography Techniques by Analyzing Metal Oxide and Organic UV Absorbers in Commercial Sunscreens
复制标题
通过分析商业防晒霜中的金属氧化物和有机紫外线吸收剂，整合元素分析和色谱技术
DOI：
10.1021/acs.jchemed.5b00866
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发表时间：
2016
影响因子：
3
通讯作者：
Abdullah Hijazi
中科院分区：
文献类型：
--
作者：
Rosalynn Quiñones;Jennifer Logan Bayline;D. Polvani;D. Neff;Tamara D. Westfall;Abdullah Hijazi
一系列的本科实验室实验，利用反相HPLC分离，电感耦合等离子体光谱（ICP），扫描电子显微镜与能量色散光谱（SEM-EDS）的商业防晒霜的分析。许多防晒霜品牌的活性成分除了有机酸外，还包括锌或氧化钛。学生使用ICP测定锌含量，使用SEM-EDS测定化学成分和粒度。使用HPLC对有机紫外线吸收剂奥克立林和氧苯酮进行定量。随着这些有趣的表征技术在第二或第四年的化学课程中的结合，并通过让学生分析防晒霜样品是医学相关的健康影响方面，学生参与及时的研究，并在同一时间获得接触到各种仪器在分析一个熟悉的家用产品。
A series of undergraduate laboratory experiments that utilize reversed-phase HPLC separation, inductively coupled plasma spectroscopy (ICP), and scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS) are described for the analysis of commercial sunscreens. The active ingredients of many sunscreen brands include zinc or titanium oxide in addition to organic acids. Students determine the zinc content using ICP, and the chemical composition as well as particle sizes using SEM-EDS. The organic UV absorbers octocrylene and oxybenzone are quantified using HPLC. With the incorporation of these interesting characterization techniques in second or fourth-year chemistry courses, and by having students analyze sunscreen samples that are medically relevant in terms of health effects, students engage in timely research and at the same time gain exposure to a variety of instruments in the analysis of a familiar household product.