Development of a Hydrogen Sulfide End-of-Service-Life Indicator for Respirator Cartridges Using Cobinamide.
Development of a Hydrogen Sulfide End-of-Service-Life Indicator for Respirator Cartridges Using Cobinamide.
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DOI：
10.1016/j.snb.2016.02.129
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发表时间：
2016-07
期刊：
影响因子：
--
通讯作者：
Bell S
中科院分区：
文献类型：
--
作者：
Greenawald LA;Boss GR;Reeder A;Bell S
开发了一种廉价的纸基传感器，用于检测低ppm浓度的硫化氢气体。在一根分叉光纤的末端放置一张含有羟基钴酰胺[OH(H2O)CBI]的滤纸，并在暴露于10.0ppm的硫化氢气体(NIOSH建议的暴露限值)期间监测OH(H2O)CBI的反射光谱。硫化物(HS-−)的反应使反射率在400-450 nm范围内增加，在470-550 nm范围内降低。在相对湿度为25%、50%和85%的条件下，监测光谱随时间的变化。在较高湿度下的光谱位移表明CBI(III)化合物的还原。该传感器用于检测呼吸器碳床中硫化氢的穿透，检测结果与标准电化学检测器的检测结果吻合较好。这种简单的纸基传感器可以为硫化氢气体提供实时的服务终止警报。
An inexpensive paper-based sensor was developed for detecting low ppm concentrations of hydrogen sulfide gas. A piece of filter paper containing aquohydroxocobinamide [OH(H2O)Cbi] was placed on the end of a bifurcated optical fiber, and the reflectance spectrum of the OH(H2O)Cbi was monitored during exposure to 10.0 ppm hydrogen sulfide gas (NIOSH recommended exposure limit). Reaction of sulfide (HS−) yielded an increase in reflectance from 400–450 nm, and decrease from 470–550 nm. Spectral changes were monitored as a function of time at 25, 50, and 85% relative humidity. Spectral shifts at high-er humidity suggested reduction of the Cbi(III) compound. The sensor was used to detect hydrogen sulfide breakthrough from respirator carbon beds and results correlated well with a standard electrochemical detector. The simple paper-based sensor could provide a real-time end-of-service-life alert for hydrogen sulfide gas.