Patent ID: 7547137

Claim:
A freezing point measuring method of acquiring a freezing point of a sample, comprising: lowering a temperature of a sample showing supercooling to cool to be subjected to a differential scanning calorimetry; specifying a time range or an output temperature range showing a state in which the sample is at a constant temperature at a freezing temperature in a DSC curve or an output temperature curve provided by the calorimetry; and using the DSC curve or the output temperature curve in the specified temperature range or the specified output temperature range to acquire the freezing point of the sample, wherein in the DSC curve and the output temperature curve, in a heat generating peak portion of a procedure of freezing the sample from a supercooled liquid, in a portion disposed in the time range or the output temperature range showing the state in which the sample is at the constant temperature at the freezing temperature, a temperature and a DSC value at a certain time point are acquired, a thermal resistance value between the sample and an output temperature measuring point is provided previously, and the freezing point of the sample is acquired by adding a product provided by multiplying the DSC value by the thermal resistance value to the temperature at the certain time point.