This paper describes an ultra-high-vacuum thermal desorption spectrometer, designed to study hydrogen in steels at ∼1 wt ppm (∼50 atomic ppm) concentration. The high sensitivity achieved also facilitates the analysis of surface phenomena. The instrument was evaluated with model materials and provided good measurements of diffusible hydrogen. A hydrogen peak at ∼350 °C was identified for steels exposed to water during hydrogen charging, and attributed to water molecules adsorbed on the sample surface for samples exposed to the laboratory atmosphere for times as short as 1 min. Recommendations are made for precautions to be taken when handling the samples.

中文翻译：

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热脱附光谱仪，用于测量捕集的氢气的ppm浓度

本文介绍了一种超高真空热解吸光谱仪，旨在研究浓度为〜1 wt ppm（〜50原子ppm）的钢中的氢。获得的高灵敏度也有助于分析表面现象。用模型材料对仪器进行了评估，并提供了可扩散氢的良好测量结果。对于在充氢过程中暴露于水的钢，在〜350°C处发现了一个氢峰，这归因于暴露于实验室大气中的样品（短至1分钟）吸附在样品表面上的水分子。建议在处理样品时要采取预防措施。