Undatim Sonoreactor

Mason et al. reported for the first time the response of the TA dosimeter with different ultrasonic sources and frequencies. They employed an ultrasonic cleaning bath (Kerry Pulsatron 55 operating at 38 kHz) with different immersed reactors (flat bottom Erlenmeyer and round bottom flask) and the Undatim Sonoreactor with 20-, 40-, or 60-kHz horns. Ultrasonic power measurements were monitored using the calorimetric method described previously. 

In this range of frequencies, most workers design their own system by themselves. However, Undatim D-sonoreactor delivers a 500-kHz wave to a ceramic directly fixed to the reaction cell. The common feature is the direct emission in the sonicated medium, via a ceramic protected by a thin layer of enamel, or through the glass bottom of the cell. In this case, the thickness should be adjusted to /2 to avoid the loss of energy by reflection. 

A mixture of m-chloroperbenzoic acid (MCPBA, 55% purity in 10% m-chlorobenzoic acid and 35% water, from Merck, 0.32 g), methyl oleate (Aldrich, 0.2 g, 0.68 mmol) and deionized water (25 mL) was placed in a water-cooled glass cell. Sonication was carried out using a 20-kHz (53W cm"2) ultrasound horn (Sonoreactor, Undatim Ultrasonics, Louvain la Neuve, Belgium), in a water-cooled jacketed glass cell (40 mm i.d., 80 mm length). The tip of the ultrasonic probe was submersed to 5 mm below the surface of the reaction mixture and the system was sonicated for 15 min with the temperature maintained at about 20°C by water circulating through the jacket. 

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