Determination of Zr, Nb, Mo, Sn, Hf, Ta, and W in seawater by N-benzoyl-N-phenylhydroxylamine extraction chromatographic resin and inductively coupled plasma-mass spectrometry
Determination of Zr, Nb, Mo, Sn, Hf, Ta, and W in seawater by N-benzoyl-N-phenylhydroxylamine extraction chromatographic resin and inductively coupled plasma-mass spectrometry
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DOI：
10.1016/j.microc.2014.11.006
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发表时间：
2015-03
影响因子：
4.8
通讯作者：
Sheng-ling Sun;Jie Li
中科院分区：
文献类型：
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作者：
Sheng-ling Sun;Jie Li
建立了四极电感耦合等离子体质谱(Q-ICPMS)测定海水中的锆(Zr)、氢(Hf)、铌(Nb)、钽(Ta)、钼(Mo)、钨(W)和锡(锡)的方法。该方法基于微孔丙烯酸酯聚合物树脂负载的N-苯甲酰-N-苯基羟胺(BPhA)萃取色谱分离7种元素。优化的工艺条件表明，BPHA树脂对Zr、Nb、Mo、Sn、Hf、Ta和W(氟化物可溶元素)有较高的选择性吸附，而对其他干扰元素和基质元素的吸附最小。优化的洗脱液混合物及其摩尔分数可对所有分析物进行满意的回收率。用6微克分子L−、1Hf/1微克分子−和1微克分子−溶液洗脱，回收率分别为99%、97%、97%、99%、99%、99%、95%、98%。此外，分离和浓缩这些元素的技术提供了一个低总方法空白。该方法的检出限分别为：Zr 0.5ppt、Nb 0.2ppt、Mo 1.7ppt、Sn1.0ppt、Hf 0.1ppt、Ta 0.1ppt、W 0.3ppt。通过对海水标准物质的重复分析，对方法的有效性进行了评价，结果的精密度优于3%(RSD，n=4)，结果与标准值吻合良好。建立的方法用于海水样品的分析是可行和有效的。
A method has been developed for the determination of zirconium (Zr), hafnium (Hf), niobium (Nb), tantalum (Ta), molybdenum (Mo), tungsten (W), and tin (Sn) in seawater by quadrupole inductively coupled plasma-mass spectrometry (Q-ICP-MS). The method is based on separation of the seven elements by extraction chromatography using N-benzoyl-N-phenylhydroxylamine (BPHA) supported on a microporous acrylic ester polymeric resin. The optimized procedure indicates that the BPHA resin has high selective adsorption for Zr, Nb, Mo, Sn, Hf, Ta, and W (known as fluoride soluble elements), whereas other interference and matrix elements are minimally adsorbed. The optimized eluent mixture with their molarity gives satisfactory recoveries for all analytes. The recovery can be achieved 99% for Zr, 97% for Nb, 97% for Mo, 99% for Sn, 99% for Hf, 95% for Ta, and 98% for W, respectively, by eluting with 6 mL of 6 mol L− 1HF/1 mol L− 1HCl. Furthermore, the technique for separation and enrichment of these elements provides a low total method blank. The detection limits for this method are 0.5 ppt for Zr, 0.2 ppt for Nb, 1.7 ppt for Mo, 1.0 ppt for Sn, 0.1 ppt for Hf, 0.1 ppt for Ta, and 0.3 ppt for W, respectively. The validity of the method is evaluated by replicate analyses of seawater reference materials; the precision of the results is better than 3% (RSD,n= 4), and the results are in good agreement with certified values. The established procedure has proved to be both practical and effective for seawater sample analyses.