Analytical applications of the mercury electrode. A review

Abstract

OF CONTENTS* Reprints of this paper will be available shortly. For details, please see p. 320. t There are included a few later references, and also a few references that ought to have been in the Much literature in this field is "hidden"; we shall be grateful to those who tell us of our earlier review.sins of omission (or other sins).* "Redox buffering" is ordinarily achieved through the H+,H, couple, but sometimes through another system, e.g., uraniumIv, uraniumv'.

Cosmic ray exposure ages of iron meteorites by the Ne21/Al26method

“…After the solution was centrifuged and the precipitate washed with 20% NaOH, the superhate and washes were neutralized with concentrated HC1 to a pH of 8.0 to 8.6 and centrifuged. The amphoteric hydroxide precipitate was then washed with a buffered wash and dissolved in concen-2See Maxwell and Graham [1950], and Page, Maxwell, and Graham [1962] for reviews of the method. trated HC1.…”

“…If this discrepancy is due to radioactive decay of Ti" during the 47 years since the fall of Treysa, the half-life of Ti '4 must be close to 50 years, rather than 150 to 200 years as previously estimated [Honda and Arnold, 1964] .5 From the Ti"/A1 • ratios in our meteorites, lower limits can be placed on their terrestrial ages (Table 6). It can be seen that the terrestrial age of Norfolk, alleged to have fallen in 1907 [Prior andHey, 1953], is greater than 120 years. Nininger [1937] had previously pointed out tha;t this meteorite appears somewhat…”

Separation and Determination of Lead, Cadmium, and Tin by Controlled Potential Coulometry.

“…of arsenic in crude oils is needed in petroleum technology because of the possible effect of arsenic on expensive platinum reforming catalysts. The decrease in hydrogenation activity of platinum metal in aqueous systems in the presence of arsenic (IS, 17), and the deposition of arsenic on the platinum catalyst during the reforming process (18) may indicate that in certain forms arsenic has a specific poisoning effect in hydrocarbon media similar to that observed in aqueous systems but opinion on this point is divided (5,9,10,11). The amount of arsenic recovered from the used catalyst indicates that the concentration of arsenic in platformer feedstocks is generally less than 10 p.p.b.…”

“…Then a halide is added, the solution is made acidic, and tin is determined gravimetrically after deposition on a cathode, or polarographically (1-5, 8, 9). Page et al (10) reviewed the utility of a mercury pool as an electrode for coulometric measurements. Since this electrode is very useful where separations are involved, an investigation was begun to develop a scheme of analysis for a single solution containing lead(II), cadmium (II), and tin (IV).…”

Methods of chemical analysis used to characterize battery materials

“…Other classical separation procedures can be used to separate many metals from A1 3 + including electrodeposition of heavy metals into a mercury cathode 5 and precipitation with hydrogen sulfide. 6 The use of complexing agents to allow the determination of A1 3 + in the presence of certain interferences I reported by Tikhonov.…”