Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, USA.
J Am Chem Soc. 2010 Mar 31;132(12):4046-7. doi: 10.1021/ja910366p.
A colorimetric detection method using amine-functionalized polymer films doped with a pH indicator has been developed for the rapid, sensitive, and quantitative detection of gaseous formaldehyde at concentrations well below the immediately dangerous to life or health (IDLH) limit. In 1 min, visible color changes are easily observed, even down to the permissible exposure limit (PEL) at 750 ppb. The limit of detection is below 50 ppb (7% of the PEL) after 10 min of exposure. This sensor is essentially unaffected by changes in humidity or temperature (4 to 50 degrees C) and is not sensitive to common interferents.
已经开发出一种使用胺官能化聚合物膜掺杂 pH 指示剂的比色检测方法，用于快速、灵敏和定量检测浓度远低于立即威胁生命或健康 (IDLH) 限值的气态甲醛。在 1 分钟内，即使在允许暴露限值 (PEL) 为 750 ppb 时，也可以轻松观察到可见的颜色变化。暴露 10 分钟后，检测限低于 50 ppb（PEL 的 7%）。该传感器基本不受湿度或温度（4 至 50 摄氏度）变化的影响，对常见干扰物也不敏感。
