Atomic Absorption, Atomic Emission, and Flame Emission Spectrometry

Iridium and Rhodium as Permanent Chemical Modifiers for the Determination of Ag, As, Bi, Cd, and Sb by Electrothermal Atomic Absorption Spectrometry

“…However, the most emphasized property is that the modifier may remain in the tube for several hundred heating cycles, not needing to be introduced together with each aliquot of sample (3). Among the drawbacks is the possibility of multiple peaks, due to the formation of a nonhomogeneous layer, overstabilization for some analytes, limitations in the parameters of the temperature program, and applications only to relatively simple samples (2).…”

Poly(methyl methacrylate)s with Pendant Calixpyrroles and Crown Ethers: Polymeric Extractants for Potassium Halides

“…[12] Flame emission spectroscopy (FES) was used to confirm the coextraction of potassium in the above experiments. [13] The organic phase obtained after extracting KF with polymer 4 afforded an emission intensity (EI) of 0.401 (at 766.5 nm, i.e., the emission wavelength of the excited potassium ion produced by the flame source) after dilution with a known amount of ethyl acetate. By way of comparison, the organic phases produced EI values of 0.277 and 0.038, respectively, when polymers 5 and 6 were used as extractants under otherwise identical conditions.…”

Poly(methyl methacrylate)s with Pendant Calixpyrroles and Crown Ethers: Polymeric Extractants for Potassium Halides

“…Flame emission spectroscopy (FES) was used to confirm the coextraction of potassium in the above experiments 13. The organic phase obtained after extracting KF with polymer 4 afforded an emission intensity (EI) of 0.401 (at 766.5 nm, i.e., the emission wavelength of the excited potassium ion produced by the flame source) after dilution with a known amount of ethyl acetate.…”