DYNAMIC-MODEL OF AN OPTICAL ABSORPTION-BASED PH SENSOR

被引：17

作者：

KOSTOV, Y ^{[1
]}

TZONKOV, S ^{[1
]}

YOTOVA, L ^{[1
]}

机构：

[1] TECHNOL UNIV SOFIA,DEPT BIOTECHNOL,BU-1756 SOFIA,BULGARIA

来源：

ANALYST | 1993年 / 118卷 / 08期

关键词：

MATHEMATICAL MODEL; OPTICAL PH SENSOR; DYNAMIC CHARACTERISTICS OF THE SENSOR;

D O I：

10.1039/an9931800987

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A mathematical model of an optical absorption-based pH sensor is described. Emphasis is placed on the influence of the parameters of the sensor and the pH on the dynamic characteristics of the sensor. It is shown that the response is 'non-symmetrical', i.e., the response time when pH(initial) - pH(final) > 0 is not equal to the response time when pH(initial) - pH(final) < 0. This theoretical result was confirmed by experiment. The influence of different parameters, viz., pK(ind), epsilon, diffusion coefficient and thickness of the membrane, was also investigated.

引用

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页码：987 / 990

页数：4

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