Photothermal deflection spectroscopy for ultra trace analysis of cobalt and copper ions

Abstract

Photothermal deflection spectroscopy was applied for the abs. detn. At room temp. of ultra trace concn. of Co and Cu ions in aq. soln. The samples were prepd. by percolating 2 L of soln. prepd. from Merck Titrisol Stds. in 200 mg Merck-I cation-exchange resin. With the present exptl. conditions, the detection limit is 20 ppb for Cu and 200 ppb for Co ions within an overall accuracy of 5%. The response of the spectrometer was calibrated by using the inductively coupled plasma technique.