Some liquid detergents contain non ionic surfactants.
2.
M . S . EL Salmawy, Y . Nakahiro and T . Wakamatsu, 1993, The role of silanol group in flotation separation of quartz from feldspar using non ionic surfactants, 18th IMPC, pp . 845 849, The Australian Institute of Mining and Metallurgical Engineering, Sydney, Australia
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