Navegando por Autor "Stapelfeldt, Danielle Marques de Araujo"
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Item Colorimetric determination of ether amine greases utilized in the flotation of iron ore.(2009) Stapelfeldt, Danielle Marques de Araujo; Yoshida, Maria Irene; Carvalho, Cornélio de FreitasEther amine greases are commonly used in the flotation of iron ore, and after use are discarded in the tailings dams. The aim of this work was to quantify a commercial ether amine using the bromocresol green dye in chloroform. The statistical data obtained show that the method is characterized by satisfactory accuracy and precision with a detection limit below 1 mg/L. The recovery obtained was 98.53%, in average. In addition, the method presented here provided a recovery of ether amine contained in effluents and solids higher than 98%.