method

dissolution time/min

determination of dissolution time by viscosity method/min

characteristic

dissolution time method

65

50

Large error and time consuming

solution viscosity method

50

50

It’s viscosity method in itself, so it’s time-consuming to measure the precise experiment

conductivity method

30

55

Large error and time consuming

insolubles filtration

65

60

Small error and time consuming

drop ball method

70

65

Simple operation and small error