Naphthylaminesulfonic Acids...New Class of Organic Reagents for Spectrophotometric Determination of Trace Amounts of Osmium

Spectrophotometric Determination of Palladium with Quinoxaline-2,3-dithiol

“…show that platinum, osmium, nickel, tetroxide (4,11)• Precipitation with dimethylglyoxime in acid solution will separate palladium from platinum (2,4) and from most other elements, including nickel. Additional work is needed to test the reliability of the separation of small amounts of palladium from larger amounts of nickel, cobalt, and iron.…”

“…The iodide ion in solution is readily oxidized by many oxidizing agents; consequently, the term "oxidant" is used to represent the net result of atmospheric reactivity with iodide. In the Los Angeles area, the major part of the oxidant usually is ozone, but the nature of the remaining oxidizing material is not definitely known (7,11,12). Although some work has been done on the reactivity of several organic peroxides in the microgram range with iodide ion (3), it was felt that it would be useful to investigate the reaction of 6 X 10-2 (1% by weight) iodide ion with ozone, hydrogen peroxide, peracetic acid, succinic acid peroxide, cumene hydroperoxide, di-ferf-butyl peroxide, nitrite ion, and ferf-butyl nitrite in the 10~4 to 10~5M range under varying conditions of pH.…”