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首页> 外文会议>Sensing for agriculture and food quality and safety >Portable integrated capillary-electrophoresis system using disposable polymer chips with capacitively coupled contactless conductivity detection for on-site analysis of foodstuff
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Portable integrated capillary-electrophoresis system using disposable polymer chips with capacitively coupled contactless conductivity detection for on-site analysis of foodstuff

机译：便携式集成毛细管电泳系统，使用一次性聚合物芯片和电容耦合非接触式电导检测器，用于食品的现场分析

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摘要

We present a compact portable chip-based capillary electrophoresis system that employs capacitively coupled contactless conductivity detection (C~4D) operating at 4 MHz as an alternative detection method compared to the commonly used optical detection based on laser-induced fluorescence. Emphasis was put on system integration and industrial manufacturing technologies for the system. Therefore, the disposable chip for this system is fabricated out of PMMA using injection molding; the electrodes are screen-printed or thin-film electrodes. The system is designed for the measurement of small ionic species like Li~+, Na~+, K~+, SO_4~(2-) or NO_3~- typically present in foods like milk and mineral water as well as acids e.g. in wine.
机译：我们提出了一种紧凑的基于芯片的便携式毛细管电泳系统，该系统采用电容耦合的非接触式电导率检测（C〜4D），以4 MHz作为替代检测方法，与基于激光诱导荧光的常用光学检测相比。重点放在系统集成和系统的工业制造技术上。因此，用于该系统的一次性芯片是使用注塑成型法由PMMA制成的。电极是丝网印刷或薄膜电极。该系统设计用于测量通常存在于诸如牛奶和矿泉水以及酸等食物中的小离子物种，例如Li〜+，Na〜+，K〜+，SO_4〜（2-）或NO_3〜-。在酒中。

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