Flotation separation of Cd, Co, Cr, CU, Ni and TI from calcium minerals and their determination by inductively coupled plasma - atomic emission spectrometry

摘要

The method of inductively coupled plasma-atomic emission spectrometry (lCP-AES), is devel­oped for determination of Cd, Co, Cr, Cu, Ni and TI in traces in calcite and gypsum. The interferences of Ca as ma­trix element on Cd, Co, Cr, Cu, Ni and TI intensities during their ICP-AES determination are investigated. The results reveal that Ca does not interfere on intensities of Cr, but tends to decrease the intensity of the other elements. To eliminate those matrix interferences of Ca on trace element intensities a flotation separation method is proposed. Lead(II) hexamethylenedithiocarbamate. Pb(HMDTC)2, is applied as a collector for flotation of trace elements from acidic solutions of mineral samples. The most suitable concentrations of calcite and gypsum solutions for flotation are ascertained. The detection limits of ICP-AES method following flotation of elements present in calcite and gypsum as impurities are determined: 0.022 and 0.061 micro g*g^-I for Cd, 0.071 and 0.042 micro g*g^-I for Co, 0.026 and 0.132 micro g*g^-I for Cr, 0.164 and 0.149 micro g*g^-I for Cu, 0.289 and 0.095 micro g*g^-I for Ni and 0.645 and 0.766 micro g*g^-I for TI. respectively. ud