1 Method Summary
In this method, the acidic components in specimen are extracted by boiling ethanol and then titrated by potassium hydroxide solution in ethanol
2 Apparatus
2.1 Erlenmeyer flask: 250 or 300 mL.
2.2 Spherical reflux condenser: in a length about 300mm.
2.3 Micro-buret: 2mL, in a scale division of 0.02mL.
2.4 Electric hot plate or water bath.
