Determination of rare earths in rocks by powder introduction inductively coupled high frequency plasma spectroscopy with foam

The requirements for the adsorption with PMBP (1-phenyl-3-methyl-4-benzoyl-pyrazolone-5) are 40 ml of test solution, 0.55 g of the foamed plastics and 2 to 6 of pH dependence range. After shaking for 3 to 5 min, the foam plastics loaded with sample is picked out, pressed dry and ashed, and then mixed with quantitative spectroscopy buffer and determined with powder introduction plasma spectroscopy. When the content of 15 single rare earths are within 0.0001 to 0.03%, the relative standard deviation is 4.8 to 12.1% through 25 measurements. This method is characterized by high relative sensitivity, good accuracy, low cost and short period run