National Institute for Occupational Safety and Health, National Personal Protective Technology Laboratory, Evaluation and Testing Branch (CDC/NIOSH/NPPTL/ETB), Centers for Disease Control and Prevention , 1095 Willowdale Road, Morgantown, West Virginia 26505, United States.
Department of Medicine, University of California, San Diego , 9500 Gilman Drive, La Jolla, California 92093, United States.
ACS Sens. 2017 Oct 27;2(10):1458-1466. doi: 10.1021/acssensors.7b00396. Epub 2017 Oct 12.
An inexpensive red, green, blue (RGB) color sensor was developed for detecting low ppm concentrations of hydrogen cyanide gas. A piece of glass fiber filter paper containing monocyanocobinamide [CN(HO)Cbi] was placed directly above the RGB color sensor and an on chip LED. Light reflected from the paper was monitored for RGB color change upon exposure to hydrogen cyanide at concentrations of 1.0-10.0 ppm as a function of 25%, 50%, and 85% relative humidity. A rapid color change occurred within 10 s of exposure to 5.0 ppm hydrogen cyanide gas (near the NIOSH recommended exposure limit). A more rapid color change occurred at higher humidity, suggesting a more effective reaction between hydrogen cyanide and CN(HO)Cbi. The sensor could provide the first real time respirator end-of-service-life alert for hydrogen cyanide gas.
一种廉价的红、绿、蓝（RGB）颜色传感器被开发出来，用于检测低 ppm 浓度的氢氰酸气体。将一片含有单氰合钴酰胺[CN(HO)Cbi]的玻璃纤维滤纸直接放在 RGB 颜色传感器和片上 LED 上方。当暴露于浓度为 1.0-10.0 ppm 的氢氰酸气体时，监测纸张反射光的 RGB 颜色变化，相对湿度为 25%、50%和 85%。在暴露于 5.0 ppm 氢氰酸气体的 10 秒内，发生了快速的颜色变化（接近 NIOSH 推荐的暴露限值）。在更高的湿度下，颜色变化更快，这表明氢氰酸和 CN(HO)Cbi 之间的反应更有效。该传感器可以为氢氰酸气体提供第一个实时呼吸器寿命终止报警。
