DETERMINATION AND CORRELATION OF THE WATER ACTIVITY OF PROPYLENE-GLYCOL SOLUTIONS

被引：13

作者：

ALZAMORA, SM

CHIRIFE, J

GERSCHENSON, LN

机构：

来源：

FOOD RESEARCH INTERNATIONAL | 1994年 / 27卷 / 01期

关键词：

WATER ACTIVITY; CRYOSCOPIC; NORRISH EQUATION; PROPYLENE GLYCOL; POLYOLS;

D O I：

10.1016/0963-9969(94)90179-1

中图分类号：

TS2 [食品工业];

学科分类号：

0832 ;

摘要：

The water activity (a(W)) of propylene glycol (PG) solutions in the range 2.03-8.65 g PG/100g water is derived from the measurement of their freezing points. Resulting data follow closely Norrish's equation, a(W) (1-X(2)) exp (-K X(2)(2)), where X(2) is the molar fraction of PG and K is a constant which may be related to the structure of the solute molecule. The dimensionless parameter K has a value of 4.04 +/- 0.22. Some physico-chemical aspects of water activity lowering in propylene glycol solutions are discussed.

引用

页码：65 / 67

页数：3

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