Valid for arsenic content greater than or equal to 0.2 percent. The sample is dissolved by oxidizing attack and the hydrochloric solution is distilled after reducing the arsenic to the trivalent state. In the hydrochloric distillate, arsenic is dosed gravimetrically in the form of arsenical sulphide. Method. Calculation.
UNI 3617-1955 history
1955UNI 3617-1955 Procedures for chemical analysis of minerals. Determination of arsenic in iron ore. Gravimetric method.