Argon bubbles

Hart and Henglein [14] also reported the sonolytic decomposition of nitrous oxide in aqueous solutions under pure argon, pure N2O and the mixture of the two gases and reported the formation of species such as N2, O2, N02 and N03 with the maximum yield being in the Ar/N20 mixture in the vol% ratio of 85 15. Although H20 is thermodynamically much more stable than N2O but they postulated that all H20 and N2O molecules in an argon bubble were converted into free radicals in the short time of adiabatic compression phase of the bubble. They proposed a series of free radical reactions for the formation of all these species in aqueous solutions. 

Figure 3. Long-term corrosion measurement of an electrolytic Sn-Zn alloy containing 26% Zn (by weight) in a 3% NaCI solution, pH = 4.000, with argon bubbling through the solution. Upper diagram corrosion potential vs. time lower diagram CMT and EC measurements vs. time. After 80-100 min, the ratio CMT/BC is close to 4. (Reprinted from Ref. 2, with kind permission from Elsevier Science Ltd., Kidlington, Oxfmd, UK.)...

Checker employed concentrated HBr with 1 mg of Na2S03 added per 200mL followed by purging the solution with argon bubbling. 

Under argon bubbling, the degradation is faster than under air or oxygen no PCP is detected after 50-min sonication. From these experiments, it was postulated that C02 is transformed to CO as observed in high-temperature chemistry because of the high temperature inside the cavitation bubble. 

Prepare a solution of 0.01 M aniline+O.lM HC1. Assemble a three-electrode cell by using the polished GC disk electrode as working electrode, a bare GC rod as auxiliary electrode and a Ag/AgCl/3M KC1 as reference electrode. Deaerate the cell solution (0.01 M aniline+0.1M HC1) by nitrogen (or argon) bubbling for ca. 

A solution of 96 mg (65 mmol) of 85 in 60 mL of cyclohexane in a quartz tube is deoxygenated by argon bubbling. Irradiation is carried out by means of a Rayonet photochemical reactor using 254 nm irradiation lamps during 4 h. The solution is evaporated and the residue is separated by preparative HPLC (RSiL, 10 mm, 25 x 1 cm, 5mL/min) using hexane/ethyl acetate (30 1) as eluant. Compound 86 (30 mg) is obtained as colorless oil, while... 

After the emulsification of a monomer it is necessary to wait until the little argon bubbles collect on the surface. Subsequently the emulsion is pressed into the dilatometer. 

Figure 2 - Cyclic voltammetry (CV) of different electrodes (a) Au (pure gold), (b) RGO (roasted gold ore), (c) Mag (magnetite), (d) Hem (hematite) disc electrodes in 0.04 M NaCN solution at pH 10.5 with scan rate of 10 mV/s, argon bubbling onto the surface of electrolyte at 25 °C...

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