William W. Vaughn 1967 The detector utilizes a large-volume atomic-absorption technique for quantitative determinations of mercury vapor thermally released from crushed rock. A quartz-enclosed noble-metal amalgamative stage, which is temperature controlled and is actuated by a radio-frequency induction heater, selectively traps the mercury and eliminates low-level contamination. As little as 1 part per billion of mercury can be detected in a 1-gram sample in a 1-minute analytical period. application/pdf 10.3133/cir540 en U.S. Dept. of the Interior, Geological Survey, A simple mercury vapor detector for geochemical prospecting reports