DISCRIMINATION AND DETERMINATION OF GASES UTILIZING ADSORPTION LUMINESCENCE

被引：27

作者：

UTSUNOMIYA, K

NAKAGAWA, M

TOMIYAMA, T

YAMAMOTO, I

MATSUURA, Y

CHIKAMORI, S

WADA, T

YAMASHITA, N

YAMASHITA, Y

机构：

[1] OKAYAMA UNIV SCI,FAC ENGN,OKAYAMA 700,JAPAN

[2] OKAYAMA UNIV,FAC SCI,OKAYAMA 700,JAPAN

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1993年 / 11卷 / 1-3期

关键词：

D O I：

10.1016/0925-4005(93)85285-I

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Thermoluminescence caused by adsorbates (adsorption thermoluminescence) appears in the process of heating Al2O3 powder that had previously adsorbed the vapour of an organic solvent, such as ethanol or acetone, at room temperature. The profiles of the thermoluminescence spectrum and glow curve depend on the kind of adsorbed vapour. The total amount of emitted light L depends on the concentration of the vapour in air, and L increases with an increase in the duration of adsorption. The adsorbates that act as the origin of the thermoluminescence are accumulated through a Langmuir-type adsorption process of very low activation energy (about 0.02 eV). These characteristics of the adsorption thermoluminescence enable us to discriminate and determine very low concentrations of these vapours. For example, L is proportional to the concentration of acetone vapour below 20 ppm for an adsorption time of 10 min, and the 1 ppm of vapour can be measured with good reproducibility.

引用

页码：441 / 445

页数：5

共 4 条

[1]

Claudel B., 1978, REV CHEM INSTRUM, V2, P75

[2]

Ivey H. F., 1974, Journal of Luminescence, V8, P271, DOI 10.1016/0022-2313(74)90001-5

[3]

NAKAGAWA M, 1990, BUNSEKI KAGAKU, V39, P797

[4] SPATIAL-DISTRIBUTION READOUT SYSTEM OF THERMO-LUMINESCENCE SHEETS-II [J].

YAMAMOTO, I ;

IMAEDA, K ;

TAKAHASHI, N ;

NINAGAWA, K ;

TOMIYAMA, T ;

WADA, T ;

YAMASHITA, Y .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1987, 256 (03) :567-575

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