FLASH-PHOTOLYSIS HIGH-PERFORMANCE LIQUID-CHROMATOGRAPHY METHOD FOR STUDYING THE SEQUENCE OF PHOTOCHEMICAL-REACTIONS - DIRECT PHOTOLYSIS OF PHENOL

被引：15

作者：

LIPCZYNSKAKOCHANY, E ^{[1
]}

BOLTON, JR ^{[1
]}

机构：

[1] UNIV WESTERN ONTARIO,DEPT CHEM,PHOTOCHEM UNIT,LONDON N6A 5B7,ONTARIO,CANADA

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 1992年 / 26卷 / 12期

关键词：

D O I：

10.1021/es00036a028

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The application of flash photolysis followed by high-performance liquid chromatography (HPLC) analysis of photoproducts is extended to the investigation of the photodegradation of phenol (I) and p-benzoquinone (II) in undegassed (1.0 X 10(-4) M) aqueous solution. Analysis after a single flash indicated that II is the principal p product of the photolysis of I. Small amounts of hydroquinone are also detected. After several flashes had been executed, the quantity of hydroquinone (M) increased and formation of 2-hydroxy-p-benzoquinone (IV) was also observed. These compounds are concluded to be the products of the secondary photolysis of I, since the analysis of a solution of II after a single flash revealed these same two photoproducts in equimolar amounts. The photochemistry of I was found to be independent of pH in the range 3.0-8.0, but both the amount of photodegradation of I and the product distribution changed markedly on alkalization (pH > 10). It is concluded that photochemical removal of I from alkaline solutions is more efficient than from neutral and acidic ones.

引用

页码：2524 / 2527

页数：4

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