Ferromagnetic and superparamagnetic contamination in ...
1982-1-1 · Ferromagnetic and superparamagnetic contamination in pulverized coal Frank E. Senftle, Arthur N. Thorpe*, Corrinne C. Alexander and Robert B. Finkelman US Geological Survey, Reston, VA 22092, USA *Howard University, Washington, DC 20059, USA [Received 6 January 1981; revised 1 5 May 1 981 ) Although no significant major-element contamination is