熱重量測定による油脂の品質評価 (第1報)

飽和モノ, ジ及びトリグリセリドの熱分解挙動

抄録

Investigation of pyrolysis characteristics of saturated mono-, di- and triglycerides by thermogravimetry (TG) and derivative thermogravimetry (DTG) was conducted.
1) The TG and DTG curves of mono-, di- and triglycerides showed similar patterns when the glyceride groups was the same in all cases. However, different patterns were obtained when a different glyceride group was used in each case. The differences were remarkable at temperatures at which the rate of weight reduction was maximum during pyrolysis under a stream of nitrogen : about 300°C in the case of monoglyceride, and about 420°C in the case of triglyceride. For diglyceride, two maximum rates were observed in the temperature range from 350 to 400°C.
2) The initial or final temperature of the pyrolysis of mono-, di- and triglycerides having the same acyl group increased in the order of monoglyceride, diglyceride and triglyceride.
In the pyrolysis of mono- and diglycerides, temperatures at initial and 75% pyrolysis increased with acyl carbon number. However, this tendency was not apparent in pyrolysis of triglyceride.