NONAQUEOUS POTENTIOMETRIC DETERMINATION OF ACIDITIES OF MODEL COMPOUNDS, COALS AND COAL DERIVED PRODUCTS

被引：3

作者：

REDLICH, PJ ^{[1
]}

JACKSON, WR ^{[1
]}

MARSHALL, M ^{[1
]}

LARKINS, FP ^{[1
]}

机构：

[1] UNIV TASMANIA,DEPT CHEM,HOBART,TAS 7001,AUSTRALIA

来源：

FUEL PROCESSING TECHNOLOGY | 1990年 / 25卷 / 01期

关键词：

D O I：

10.1016/0378-3820(90)90096-B

中图分类号：

O69 [应用化学];

学科分类号：

081704 [应用化学];

摘要：

A nonaqueous potentiometric titration method for the determination of weak acids using ethylenediamine and sodium aminoethoxide as solvent and titrant respectively is discussed. The use of absolutely dry, carbon-dioxide free reagents is found to be essential to accurately determine endpoints. Refinements in purification and storage techniques as well as in experimental procedure compared with earlier work are described in this paper. By using the improved procedures individual phenolic groups in some dihydric phenols were resolved for the first time and previously undifferentiated dihydric phenols are now easily detected and quantitatively determined. In addition, other weakly acidic phenols with previously undetected endpoints have been titrated successfully. The acidic oxygen content of a wide range of Australian coals and of the solid and liquid coal-derived products has been determined by this potentiometric method. © 1990.

引用

页码：67 / 79

页数：13

共 19 条

[1]

[Anonymous], 1979, IUPAC CHEM DATA SERI

[2]

CHEMICAL CONSTITUTION OF COAL .16. METHYLATION STUDIES ON HUMIC ACID [J].