Date of Award
Masters of Science
A new indicator for mercury vapor of extremely high sensitivity has been found; indeed, there seems to be practically no lower limit to the concentration that can be detected. This method is based on the reaction between active selenium sulfide and the vapor. The selenium sulfide is applied as a coating to paper and the coated paper is blackened on exposure to the air containing mercury vapor, the degree of blackening being a function of time of exposure, concentration of the mercury and other factors, which can be definitely controlled. Apparatus has been developed by means of which it is possible to measure concentrations over a rather wide range.
Nordlander, Birger Wilhelm, "Selenium sulfide -- a new detector for mercury vapor" (1927). Honors Theses. 2236.