Development of Cellulosic Paper-Based Test Strips for Mercury(II) Determination in Aqueous Solution
Development of Cellulosic Paper-Based Test Strips for Mercury(II) Determination in Aqueous Solution
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DOI：
10.1155/2018/3594020
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发表时间：
2018-11
影响因子：
2.6
通讯作者：
Shoujuan Wang;Zhen Xu;Yongyi Fang;Zhongming Liu;Xin Zhao;Guihua Yang;F. Kong
中科院分区：
文献类型：
--
作者：
Shoujuan Wang;Zhen Xu;Yongyi Fang;Zhongming Liu;Xin Zhao;Guihua Yang;F. Kong
介绍了一种利用纤维素试纸条测定水溶液中汞离子（Hg 2+）浓度的有效方法--滴定法（滴涂法）。在这项研究中，双硫腙作为识别试剂被物理负载在纤维素纸基试纸条上用于Hg 2+的选择性识别。传感机理是在强酸性条件下双硫腙与Hg ~（2+）形成的配合物的光谱吸收速率。通过测定不同浓度汞溶液中汞-双硫腙络合物的吸光度得到标准曲线，相关系数（R2）达到0.9971。Hg 2+的检测范围为0.1 μg/mL ~ 30 μg/mL。此外，这些上级纤维素纸基试纸具有快速的显色时间（1.5分钟）和低体积需求（3.7 μL样品，0.0127 g/L双硫腙识别浓度）。这种便携式纸基测试条可以为现场筛选或现场半定量分析提供潜在的应用。
Titration method (dropping-on method) was introduced as an efficient approach for determining the mercury ion (Hg2+) concentration in aqueous solution by using fabricated cellulosic paper-based test strips. In this study, dithizone used as a recognition reagent was physically loaded on cellulosic paper-based test strips for Hg2+ selective recognition. The sensing mechanism was established on the spectral absorption rate of the coordination compound that was formed by dithizone and Hg2+ under strong acidic conditions. The calibration curve was obtained by the absorbency of Hg2+-dithizone complexes from different Hg2+ concentration solutions, and the correlation coefficient (R2) reached 0.9971. The detection range of the test trip for Hg2+ was obtained at 0.1 μg/mL to 30 μg/mL. Moreover, these superior cellulosic paper-based test strips have a rapid color-forming time (1.5 min) and low volume demand (3.7 μL samples at 0.0127 g/L dithizone recognition concentration). This portable paper-based test strip can give potential applications for field screening or on-site semiquantitative analysis.