Cation analysis by thin-layer chromatography and reflectance spectroscopy

Inorganic microchemical and trace analysis

“…Other optical methods of general interest include the use of low wattage microwave induced argon plasmas for the excitation of metals which makes possible a detection limit of 10"12 gram of individual metal (184). The use of reflectance spectroscopy (239) for the identification of cations separated by thin-layer chromatography is of interest as is the use of X-ray spectrography in the evaluation of ion exchange resinloaded discs which has been applied to micro and trace analysis (39). Frei and Ryan (73) also used reflectance spectroscopy for trace metal analysis.…”

Diffuse Reflectance Spectroscopy

“…308 The aim in this work was to find a qualitative analysis scheme which enabled the identification of a wide number of cations by a combination of spectra and ^-values analogous to the method proposed for amino acids. 2 s l The plates were sprayed with a dithizone-oxine reagent mixture and the spectra were recorded with the Beckman DK-2 Spectrophotometer.…”

“…Spectral Data for Cations Absorbed on MN-Cellulose 3 ° *After spraying with dithizone-oxine reagent followed by ammonia treatmentAfter spraying with dithizone-oxine reagent ment, which renders the method proposed by Zaye et al308 suitable as a fingerprint device for a large number of metals, which, if sprayed under just neutral conditions, would show little differentiation in color.…”