Patent ID: 11921068
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 5:
6. A solvent for measurement, comprising:
chloroform; and
2,2,2-trifluoroethanol, wherein the solvent has an organic base added thereto, wherein the solvent is adapted for measuring a molecular weight based on an amount of terephthalic acid terminals and an amount of hydroxy group terminals in a sample liquid, wherein the sample liquid is obtained by mixing a sample into the solvent, wherein the sample liquid is formed of a polyester or decomposition products of a polyester, and wherein the amount of terephthalic acid terminals and the amount of hydroxy group terminals in the sample liquid are measured through a nuclear magnetic resonance spectroscopy aiming at hydrogen atoms.