Analytical studies of the fluorescence of samarium in calcium sulphate

Trace analysis of lanthanides by laser excitation of precipitates

“…The erbium concentrations in the standard and in the samples with reference present were identical. For each interference, the following ratio was obtained, R = (int Er3+aamp int Er3+Std Hint Pr3+5td int Pr3+aam] ) (3) where intensities were measured by taking peak areas. According to Equation 3, if this ratio does correct for interferences, R should be unity.…”

“…Selectively excited probe ion luminescence (SEPIL) has been shown to be a potentially useful technique in the determination of trace inorganic ions (1). Gustafson (2) and Gustafson and Wright (3) have developed a method for the determination of fluorescent rare earths by coprecipitation into CaF2. Fluorescence from a specific crystallographic site of a specific rare earth ion in the lattice can be selectively excited and monitored with a nitrogen laser pumped dye laser and a high resolution monochromator.…”