Spectrophotometric and Polarographic Determinations of Soluble Silicate

Automated fast reaction-rate system for phosphate determinations in the millisecond range

“…The commercial ethanolamides, especially the diethanolamides, are mixtures of some complexity; they contain, in addition to the amide, appreciable amounts of the free amine, amine soap, amide esters, amidoamines, and possibly also amine esters (7). The specifications on these materials generally recognize these facts (2).…”

Determination of phosphorus in zircons by inductively coupled plasma atomic emission spectrometry

“…This complex can then be separated selectively from the yellow molybdosilicic acid complex, which is likewise built up, using an organic extractant depending on the pH of the solution (31). The most common extractants used for complex separation are diethyl ether (31), isobutyl acetate (32), n-butyl acetate (31), isoamyl acetate (33), methyl isobutyl ketone (31), diethyl ether-l-pentanol (5:1) (22, 31) or (3:1) (32), and chloroform-1-butanol (4:1) (31, 34) or (3:1) (35). In this work isobutyl acetate was chosen as the extractant, as it allows for quantitative extraction of the yellow molybdophosphoric acid complex at pH = 1.0.…”

General analysis of potentiostatic current-time curves for cylindrical electrodes

“…and utilize Equation 4as our approximate general i-t relation for reactions of any order at cylindrical electrodes. This i-t relation has the same form as that developed for first-order reactions at cylindrical electrodes, and its form makes it suitable for use in analyzing experimental i-t curves (7). It remains to be shown how generally valid it is for higher-order reactions, and with what accuracy it permits us to analyze i-t curves.…”