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Seletsa methapo li sebelisoa thulaganyou e laola mola eo lopolla acid e le a alkali dintho kapa lokela ho hanela moea phahameng le ho hatelloa ke metsi 'me a boela a sebelisa ya moreki, seletsa methapo rona ke ho emela ka thepa ditlabelwa, thulaganyo haeteroliki, phalla mitha, chromatography,' me mocheso exchanger .