sodium hydrogencarbonate w (NaHCO3) =4g/L，w(NaHCO3)=50g/L，2% in H2O，w (NaHCO3) =1g/L，0.2mmol/L in H2O，1.7mmol/L in H2O，7.0mmol/L in H2O，3.7% in H2O，5.6% in H2O，7.4% in H2O，5g/L,介质: H2O，20g/L,介质: H2O，30g/L, 介质: H2O，0.2mol/L,介质: H2O，0.5%，3% in H2O
