00000nam 2200000za 4500 9.841474 CaOODSP 20221107152109 cr ||||||||||| 170811s1971 oncad ob f000 0 eng d CaOODSP eng eng fre n-cn--- M34-20/136E-PDF M34-20/136 Boyd, Walter Kinsey. A plasma furnace for ashing micro-samples of particulate matter [electronic resource] / W.K. Boyd and R.K. Jeffrey, Canadian Combustion Research Laboratory, Fuels Research Centre. Ottawa : Information Canada, 1971. iv, 25 p. : charts, ill. Technical bulletin ; TB 136 Cover title. "June 1971." Digitized edition from print [produced by Natural Resources Canada]. Includes bibliographical references (p. 15). “This report describes a low-temperature, radio-frequency (R-F) ashing technique used in the preparation and concentration of combustible samples prior to chemical analysis and microscopic examination. Samples are placed in a plasma reactor through which oxygen is passed. The R-F field within the reactor converts the molecular oxygen into an active species, i.e. atomic oxygen. Low-temperature oxidation results with the consequent removal of carbon, hydrogen and nitrogen as volatile oxides, and the retention of most metallic ions. This technique has been successfully used for the past year to effectively destroy organic matrix in combustible samples without excessive loss of mineral content and to improve analyses based on atomic absorption, emission spectroscopy and conventional 'wet' methods"--Abstract, p. i. Includes abstract in French. gccst Chemistry gccst Equipment Jeffrey, R. K. Canada. Natural Resources Canada. Canada. Mines Branch. Technical bulletin (Canada. Dept. of Energy, Mines and Resources. Mines Branch) TB 136 (CaOODSP)9.834857 PDF 3.22 MB https://publications.gc.ca/collections/collection_2017/rncan-nrcan/M34-20/M34-20-136-eng.pdf 300021