Ausführung von Trennungen in einem Tropfen

Air pollution studies: The ring oven technique

“…The ring oven technique was first introduced by Weisz in 1954 (1). West, et al (2~4), pointed out the unique usefulness of the method in the transfer, con-centration, and analysis of both inorganic and organic ai rb ornc part iculates.…”

Transfer, Concentration, and Analysis of Collected Air-Borne Particulates Based on Ring Oven Techniques

“…Aluminum (3). Spray the sector with a saturated solution of morin in methanol, dry, and bathe in 2.Y hydrochloric acid.…”

“…Chromium (3). Oxidize the chromium(III) to chromate with a 1 to 1 mixture of 10% hydrogen peroxide and ammonia solution.…”

“…Limit of identification = 0.15 µg. Cobalt (3). Fume the sector over ammonia solution, apply 5% disodium hydrogen phosphate to mask any iron present in the ring zone, and spray with a 1% solution of l-nitroso-2-naphthol in acetone.…”

A General Microqualitative Technique. Combination of Ring Oven, Cation Exchange Paper, and Emission Spectrograph.

“…Many of the nonmetals exist in solution as anions, whereas the spectrographically detectable elements are cations, with some exceptions such as the permanganate ion. A combination of the Weisz ring oven (6) and cation exchange paper (4) is useful in running a complete qualitative analysis on a single drop of solution.…”