Thermal conductivity is generally the tool of choice for quantification of fixed gases, particularly lighter-than-air gases. Unfortunately, gas chromatography-thermal conductivity detectors (GC-TCDs) are difficult to introduce in first- and second-year chemistry courses where the cost and number of instruments, as well as the space required, is impractical. In this article, the authors describe the development of a small, inexpensive microcontroller-based TCD for undergraduate teaching and research laboratory experiments which utilizes a matched pellistor pair to quantify hydrogen. The total cost of materials is under $200, including the microcontroller, electronics, TCD pellistor pair, and the mechanical parts which serve as the housing and analysis chamber.

中文翻译：

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TCDuino：开发一种基于微控制器的廉价热导率检测器，用于定量混合气体

通常，热导率是定量固定气体（尤其是比空气轻的气体）的首选工具。不幸的是，气相色谱-热导检测器（GC-TCDs）很难在第一年和第二年的化学课程中引入，因为在这些课程中，仪器的成本和数量以及所需的空间都不切实际。在本文中，作者描述了一种小型，廉价的基于微控制器的TCD的开发，该TCD用于本科教学和研究实验室实验，该实验利用匹配的双键对来量化氢。材料的总成本在200美元以下，包括微控制器，电子设备，TCD针对，以及用作外壳和分析室的机械零件。