Abstract Apparatus for the collection and measurement of the amount of mercury vapors present in a volume of air or other gases. The apparatus includes a hollow chamber having a noble metal absorbent mounted therein for the absorption of mercury vapor present in gases passed therethrough, a power source connected to the absorbent for heating thereof, a light source mounted at a first end of the chamber, a first photo cell at a second end of the chamber positioned to receive a beam of light emanating from the lamp passing through the chamber, a mercury vapor reservoir adjacent the first photo cell and positioned in order that the beam of light emanating from the lamp passes through the reservoir prior to receipt thereof by the first photo cell, a second photo cell at a second end of the chamber positioned to receive a beam of light emanating from the lamp passing through the chamber without passing through the mercury vapor reservoir, a means for measuring the absorbence of the first and second photo cells and calculating the differential when the means for heating is activated, and a means for exiting the gases after the activation and measurement has been completed.
An apparatus for collecting and measuring the amount of mercury vapor present in a volume of gas which comprises in combination: a hollow chamber having a means for introducing said gas thereinto at a first end thereof, a noble-metal absorbent mounted in said chamber for the absorption of mercury vapor present in gas passed therethrough, means for connecting said absorbent to a power source for heating thereof, a light source mounted at a second end of said chamber, a first photo cell at a first end of said chamber positioned to receive a beam of light emanating from said lamp passing through said chamber, a mercury vapor reservoir adjacent said first photo cell and positioned in order that said beam of light emanating from said lamp passing through said chamber passes through said reservoir prior to receipt thereof by said first photo cell, a second photo cell at a first end of said chamber positioned to receive a beam of light emanating from said lamp passing through said chamber without passing through said mercury vapor reservoir, and means for measuring the absorbence of said first and second photo cells and calculating the differential when said means for heating is activated, and means for exiting said gases at a second end of said chamber after said activation and said measurement is completed.
Claim 2
Independent Claim
221 words
An apparatus for collecting and measuring the amount of mercury vapor present in a volume of gas which comprises in combination: a hollow chamber having a means for introducing said gas thereinto at a first end thereof, a noble-metal absorbent mounted in said chamber for the absorption of mercury vapor present in gas passed therethrough, means for connecting said absorbent to a power source for heating thereof, a light source mounted at a second end of said chamber, a first photo cell at a first end of said chamber positioned to receive a beam of light emanating from said lamp passing through said chamber, a mercury vapor reservoir adjacent said first photo cell and positioned in order that said beam of light emanating from said lamp passing through said chamber passes through said reservoir prior to receipt thereof by said first photo cell, a second photo cell at a first end of said chamber positioned to receive a beam of light emanating from said lamp passing through said chamber without passing through said mercury vapor reservoir, and means for measuring the absorbence of said first and second photo cells and calculating the differential when said means for heating is activated, and means for exiting said gases at a second end of said chamber after said activation and said measurement is completed.
Claim 3
Dependent Claim
18 words
The apparatus of claim 1 wherein said noble-metal absorbent is a resistance wire having a noble-metal plating thereon.
Claim 4
Dependent Claim
13 words
The apparatus of claim 1 wherein said light source is an ultraviolet lamp.
Claim 5
Dependent Claim
14 words
The apparatus of claim 2 wherein the noble-metal plate on said wire is gold.
Claim 6
Dependent Claim
13 words
The apparatus of claim 2 wherein said plated wire is helical in shape.
Claim 7
Dependent Claim
11 words
The apparatus of claim 5 wherein said plated wire is hollow.