… by coprecipitation with cobalt (II) hydroxide for a final determination by X-… preconcentration
procedure using Co 2+ for coprecipitation of copper, nickel, manganese and cadmium ions …

… Preconcentrations of Cu(II), Ni(II) and Pb(II) ions by using … Effects of important parameters
on preconcentration … Among the trace ions zinc, iron, cobalt, magnesium, molybdenum…

… of atomic absorption instrument on lead and cadmium ions, so this … the simultaneous extraction
and pre-concentration of lead ions … ions impose no considerable impact on simultaneous …

… In addition, heavy metal detection in drug preparations is significant in risk assessment,
so it is clear that metal ion content needs to be monitored. The International Council for …

… temperature on extraction efficiency of lead, cobalt, nickel and manganese were optimized.
… oil samples and waste oils with different properties for the determination of analyte contents. …

… Dispersive liquid-liquid microextraction based on solidification of floating organic drop for
simultaneous separation/preconcentration of nickel, cobalt and copper prior to determination …

… Furthermore, the effective contact of the elution solvent and the sorbent containing metal
ions leads to more interaction of the analytes with the solvent and definitely the analytes elution …

… (MIS) were used for the determination of metal ions. The microsample injection system …
were 0.7 nm for copper, cadmium and zinc, and 0.2 nm for cobalt and nickel. The acetylene …

… /g (Pb) to 214.86 μmol/g (Fe) with 1114.79 μmol/g in total. … for the simultaneous analysis
of eight metallic ions content in … simultaneous preconcentration of cadmium (Cd 2+ ), cobalt (…

… Coprecipitation has a significant preconcentration factor, is … a straightforward preconcentration
process for trace metal ions … to preconcentrate the analyte ions, and FAAS determined the …