Studies on the Determination of Arsenic. VII : Determination of Arsenic in Lead, Copper, Nickel and Cobalt

Following the last paper, simple and successful determinations of arsenic in some metals were studied. Likely as arsenic in other metals arsenic in lead, copper, nickel and cobalt was determined iodometrically and colorimetrically after it had been separated in the metallic state without any use of a complicated apparatus. Some rapid methods for these determinations were also studied. After separating lead as salfate, arsenic in it was determined colorimetrically in a short time of minute. Arsenic in copper was also determined rapidly by the colorimetric method after separating copper as hydroxide. Rapid determinations of arsenic in nickel and in cobalt were done photometrically or colorimetrically without any separetion