Floatability of arsenopyrite as a function of initial concentration of sodium isopropyl xanthate at various pH values. Recovery of arsenic as a function of pH in flotation of an arsenopyrite ore assaying 12.5% As (27.2% FeAsS) using 30 and 60 g/ ton sodium isopropyl xanthate and 70 g/ton frother. Flotation and depression control of arsenopyrite through pH and xanthate as the collector. Arsenopyrite Rejection