A novel porous silica monolith functionalized with 5-amino-1,10-phenanthroline for SPE of metal ions in groundwater samples prior to their analysis using ICP-MS,Analytical Methods

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A novel porous silica monolith functionalized with 5-amino-1,10-phenanthroline for SPE of metal ions in groundwater samples prior to their analysis using ICP-MS
Analytical Methods ( IF 2.7 ) Pub Date : 2018-04-21 00:00:00 , DOI: 10.1039/c8ay00442k
Awadh O. AlSuhaimi _{1,

2,

3,

4,

5} , Khaled M. AlMohaimadi _{5,

6,

7} , Bader N. AlAlawi _{8,

9} , Imran Ali _{1,

2,

3,

4,

5}

Affiliation

Porous silica monoliths are being used for favorable applications in separation science due to their inherent characteristics such as their rigid skeleton, large surface area, affordable starting materials and straightforward sol–gel synthesis under ambient conditions. This work reports a facile and inexpensive preparation of porous silica monoliths via an in situ sol–gel method using potassium silicate precursors in the presence of porosity controlling and drying regulatory additives that were polymerized inside 2.5 cm long and 7.5 mm i.d. soda-lime glass syringes. The monolithic materials were chemically functionalized with 5-amino-1,10-phenanthroline (5-aphen) and characterized using SEM, FTIR, TGA and elemental analysis. The monolith exhibited excellent chelating properties with fast adsorption capacities of 0.132, 0.139, 0.140 and 0.142 mM g⁻¹ for Zn, Co, Ni and Cu, respectively. The chelator was applied successfully as a solid phase sorbent for the sample preparation of transition metals in groundwater samples. The method accuracy was confirmed via the extraction of Cu, Co, Ni, and Zn metal ions from a groundwater certified reference material CRM SLRS-4 sample prior to ICP-MS analysis. The results were comparable with the certified values for the analyzed metal ions. The method showed efficient performance when applied for the SPE of the reported metal ions in groundwater samples from Al-Madinah Al-Munawarah city, Kingdom of Saudi Arabia. The developed SPE sorbent is effective and useful for the pre-concentration of the reported metal ions in any body of water.

中文翻译：

用5-氨基-1,10-菲咯啉官能化的新型多孔二氧化硅整体料，用于地下水样品中的金属离子的固相萃取，然后使用ICP-MS分析

多孔二氧化硅整料因其固有的特性（如刚性骨架，较大的表面积，可负担的起始材料以及在环境条件下直接进行溶胶-凝胶合成）而在分离科学中得到了良好的应用。这项工作报告了一种通过原位简便而廉价的方法制备多孔二氧化硅整料的方法在孔隙率控制和干燥调节剂存在下，使用硅酸钾前体的溶胶-凝胶法，该助剂在2.5厘米长和7.5毫米内径钠钙玻璃注射器内聚合。用5-氨基-1,10-菲咯啉（5-aphen）对单体材料进行化学功能化，并使用SEM，FTIR，TGA和元素分析对其进行表征。整料表现出优异的螯合性质，对Zn，Co，Ni和Cu的快速吸附能力分别为0.132、0.139、0.140和0.142mM g ^-1。该螯合剂已成功地用作固相吸附剂，用于地下水样品中过渡金属的样品制备。方法的准确性已通过确认ICP-MS分析之前，先从地下水认证的参考材料CRM SLRS-4样品中提取Cu，Co，Ni和Zn金属离子。结果与分析的金属离子的标准值相当。该方法应用于来自沙特阿拉伯王国Al-Madinah Al-Munawarah市的地下水样品中报告的金属离子的SPE时，显示了高效的性能。开发的SPE吸附剂对于在任何水体中预浓缩报告的金属离子都是有效和有用的。

更新日期：2018-04-21

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