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The foaming power and foam stability of three commercial alkyl polyglycosides (APG), Glucopon 215, 600 and 650, have been studied using a modified Ross Miles method. The effects of APG concentration (0.1–4.0 g/L) and temperature (30–60°C) on foam level have been analysed, determining the volume of air in the foam and the foaming power at different times (0–300 s). Furthermore, the foaminess was determined over time until 300 s, registering values from 0.95 or 0.96 to 0.98 or 0.99. Finally, different binary mixtures of surfactants have been assayed at 40°C. To prepare these mixtures Glucopon 650 was mixed with one of the following surfactants: two commercial fatty alcohol ethoxylates, Findet 1214N/23 and Findet 10/18, and a control foaming surfactant, Triton CF:32.

Foaming Power and Foam Stability of Several Alkyl Polyglycosides