| 摘要 |
<p>A method of using the device for detecting hydrogen fluoride in a medium which comprises a substrate having a reflective surface; an optically transparent film of from 0.01 to 1 micron in thickness overlying said substrate and the thickness being a function of the concentration of the hydrogen fluoride to be detected; means for providing light to the surfaces of the thin film and substrate, and means for receiving light reflected from the surfaces.</p> |
