Spectrochemical Determination of Lead, Cadmium, and Zinc in Dusts, Fumes, and Ores1

Historical Zinc Smelting in New Jersey, Pennsylvania, Virginia, West Virginia, and Washington, D.C., with Estimates of Atmospheric Zinc Emissions and Other Materials

“…Lead content in the ore ranged from 0.12 percent up to 1.58 percent, and averaged 0.44 percent. Two zinc metal samples contained an average of 0.07 percent cadmium and 0.36 percent lead (Oshry, 1941). The author does not imply that the samples were representative of all feed or zinc product, but does suggest that because some of the feedstock contained these elements, some could have been emitted to the atmosphere.…”

Spectrographic determination of sodium, potassium, and lithium in portland cement with the direct-current carbon arc

“…A method designed to use a solution may also be considered because the alkalies in portland cement are readily brought into solution by treatment with dilute hydrochloric acid. The solution may be injected into a flame (9) or a small amount dried on a graphite electrode [8,10,12,20] for arc or spark excitation.…”

“…An alternating-current arc [8] with the sample mixed with a powdered metal or graphite and compressed into pellets [21,22] indicated good possibilities except for requirements of rigidly controlled operating conditions. A solution of the cement sample dried on a graphite electrode for use in an alternating-current arc [8,12] proved to be impractical because of low intensity of the alkali lines. In the method finally adopted, a fixed quantity of the sample was placed in a cupped graphite electrode and used in a direct-current arc.…”