def METHOD_NAME(self):
    self.comp = []
    self.comp.append(Ion.from_formula("Li+"))
    self.comp.append(Ion.from_formula("MnO4-"))
    self.comp.append(Ion.from_formula("Mn++"))
    self.comp.append(Ion.from_formula("PO3-2"))
    self.comp.append(Ion.from_formula("Fe(CN)6-3"))
    self.comp.append(Ion.from_formula("Fe(CN)6----"))
    self.comp.append(Ion.from_formula("Fe2((PO4)3(CO3)5)2-3"))
    self.comp.append(Ion.from_formula("Ca[2+]"))
    self.comp.append(Ion.from_formula("NaOH(aq)"))