Highly selective simultaneous determination of Cu(ii), Co(ii), Ni(ii), Hg(ii), and Mn(ii) in water samples using microfluidic paper-based analytical devices.
Highly selective simultaneous determination of Cu(ii), Co(ii), Ni(ii), Hg(ii), and Mn(ii) in water samples using microfluidic paper-based analytical devices.
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DOI：
10.1039/d0an02200d
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发表时间：
2021-04-07
期刊：
影响因子：
--
通讯作者：
Henry CS
中科院分区：
文献类型：
--
作者：
Kamnoet P ;Aeungmaitrepirom W ;Menger RF ;Henry CS
通过蜡印法制作了一种新型纸质分析装置设计，用于同时测定Cu（II）、Co（II）、Ni（II）、Hg（II）和Mn（II）。以浴铜灵（Bc）、丁二酮肟（DMG）、双硫腙（DTZ）和4-（2-吡啶偶氮）间苯二酚（PAR）为络合剂，采用比色法对重金属离子进行定量。络合剂对重金属离子的亲和力取决于形成常数（Kf）。为了提高重金属离子测定的选择性，新装置设计了两个预处理区，掩蔽剂去除干扰离子。结果发现，两个预处理区比一个单一的预处理区在消除干扰。优化了反应时间、样品体积、络合剂体积和络合剂浓度。分析结果显示，Cu（II）、Co（II）、Ni（II）、Hg（II）和Mn（II）的最低可检测浓度分别为0.32、0.59、5.87、0.20和0.11 mg L−1。线性范围为0.32-63.55 mg L−1（Cu（II））、0.59-4.71 mg L−1（Co（II））、5.87-352.16 mg L−1（Ni（II））、0.20-12.04 mg L−1（Hg（II））和0.11-0.55 mg L−1（Mn（II））。五种金属离子的最低可检测浓度和线性允许其应用于各种水样。该传感器提供了高选择性和高效率的同时铜（II），钴（II），镍（II），汞（II），锰（II）的测定在饮用水，自来水和池塘水样品在一个单一的设备和检测肉眼。结果表明，该传感器具有良好的准确度和精密度与标准ICP-OES方法。我们提出了一个高通量研究的稳态斯托克斯位移的> 300荧光DNA稳定的银团簇和DNA序列与这些荧光团的光学性质的相关性。
A new paper-based analytical device design was fabricated by a wax printing method for simultaneous Cu(II), Co(II), Ni(II), Hg(II), and Mn(II) determination. Colorimetry was used to quantify the heavy metal ions, using bathocuproine (Bc), dimethylglyoxime (DMG), dithizone (DTZ), and 4-(2-pyridylazo) resorcinol (PAR) as complexing agents. The affinity of the complexing agent to the heavy metal ion is dependent on the formation constant (Kf). To enhance the selectivity for heavy metal ion determination, the new device was designed with two pretreatment zones, where masking agents remove interfering ions. It was found that two pretreatment zones worked better than a single pretreatment zone at removing interferences. The reaction time, sample and complexing agent volumes, and complexing agent concentrations were optimized. The analytical results were achieved with the lowest detectable concentration of 0.32, 0.59, 5.87, 0.20, and 0.11 mg L−1 for Cu(II), Co(II), Ni(II), Hg(II), and Mn(II), respectively. The linear range was found to be in the range of 0.32–63.55 mg L−1 (Cu(II)), 0.59–4.71 mg L−1 (Co(II)), 5.87–352.16 mg L−1 (Ni(II)), 0.20–12.04 mg L−1 (Hg(II)), and 0.11–0.55 mg L−1 (Mn(II)). The lowest detectable concentration and linearity for five metal ions allow it to be applied in various water samples. The sensor provided highly selective and efficient for simultaneous Cu(II), Co(II), Ni(II), Hg(II), and Mn(II) determination in drinking, tap, and pond water samples on a single device and detection by naked eye. The results illustrated that the proposed sensor showed good accuracy and precision agreement with a standard ICP-OES method. We present a high-throughput study of the steady state Stokes shifts of > 300 fluorescent DNA-stabilized silver clusters and the correlations of DNA sequence with the optical properties of these fluorophores.
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影响因子：
6.2
作者：
Chaiyo, Sudkate;Siangproh, Weena;Chailapakul, Orawon
通讯作者：
Chailapakul, Orawon
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影响因子：
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作者：
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影响因子：
9.5
作者：
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通讯作者：
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影响因子：
2.9
作者：
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通讯作者：
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影响因子：
6.1
作者：
CHAKRAPANI, G;MURTY, DSR;RANGASWAMY, R
通讯作者：
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