A portable eight-channel titrator based on high-throughput capacitively coupled contactless conductivity measurements

文献类型： 外文期刊

第一作者： Zhang, Xuzhi

作者： Zhang, Xuzhi;Zhao, Jun;Qu, Keming;Zhang, Xuzhi;Qu, Keming;Yang, Qianqian;Jiang, Xiaoyu;Zhao, Chuan

作者机构：

关键词： Electronic sensor; Capacitively coupled contactless; conductivity detector; Automatic titrator; Multichannel titration

期刊名称：MEASUREMENT （ 影响因子：3.927； 五年影响因子：3.778 ）

ISSN： 0263-2241

年卷期： 2019 年 135 卷

页码：

收录情况： SCI

摘要： Analytical chemists require multichannel and automatic tools for batch measurements. Herein, an eight-channel electronic titrator (8-CET) system was constructed to facilitate high-throughput titrations. In this system, multichannel piston pumps were used for delivery, and an 8-channel capacitively coupled contactless conductivity detector (8-(CD)-D-4) was used to monitor the conductivity of the titration solutions in arrays of disposable reaction cells. The delivery and the monitoring were both fully software-controlled allowing a simultaneous formation of eight titration curves. Its capacity for classical acid-base and precipitation titration was characterized with satisfactory results. It was also used to measure the content of CH3COOH in batched vinegar samples. The RSD between each reaction cell was 1.9%. There are two outstanding features of this new system: 1) Up to eight samples can be measured simultaneously; and 2) simple operation is realized by avoiding electrode switching and cleaning after each measurement. Therefore, it is reasonable to believe that this 8-CET system is a prospective alternative for developing more automatic and efficient titration platforms. (C) 2018 Elsevier Ltd. All rights reserved.

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