Transfer, Concentration, and Analysis of Collected Air-Borne Particulates Based on Ring Oven Techniques

Abstract

b A procedure has been developed for the analysis of the particulate material, including aerosols, collected from a very small air sample ( I cu. meter). A number of standard atmospheric sampling devices have been used for the collection of the samples. The ring oven and associated spot tests were then used for the concentration and final determination (qualitative

Recent advances in the ring oven technique. A review

“…These methods for the transfer, concentration and determination of collected airborne particulate matter are described extensively in the monograph2 and in an earlier publication. 78 If the collected sample is washed directly on the ring oven into the ring zone, only one ring is available for the comparison instead of the usual three rings in ring colorimetry, and this is accepted in many published practical examples. A possible means of obtaining three rings is to dissolve the collected sample in a suitable solvent and to prepare three sample rings, but much more of the material to be determined needs to be collected than is actually used in preparing the three rings.…”

Inorganic Microchemistry

“…Ackermann (2) has employed the ring oven in systematic studies of trace impurities in alkali and alkaline earth metal salts. West and Weisz have used the technique for the transfer, concentration, and analysis of collected air-borne particulates (214). The technique has proved of value in the detection of thorium (66), and Malissa and Ottendorfer have used the ring oven for the detection of small amounts of various cations that yield insoluble dithiocarbamates (124).…”

Air Pollution

“…A variety of metals could be determined by precipitation chromatography in sulfideimpregnated agar columns (335). The ring-oven technique was evaluated for the separation of cations from air samples (380).…”