MICROANALYTICAL ESTIMATION OF CERIUM BY A MINIATURIZED THERMOELECTRICAL SENSOR

被引：4

作者：

KOHLER, JM ^{[1
]}

STEINHAGE, G ^{[1
]}

KRAUSE, J ^{[1
]}

CAMMANN, K ^{[1
]}

机构：

[1] UNIV MUNSTER,LEHRSTUHL ANALYT CHEM,INST CHEMO & BIOSENSOR,D-48148 MUNSTER,GERMANY

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1995年 / 23卷 / 01期

关键词：

THERMAL CHEMOSENSOR; THERMOPILE; CERIUM; REDOX REACTION; INTERNAL CALIBRATION; CALORIMETRY; REACTION ENTHALPY;

D O I：

10.1016/0925-4005(94)01519-N

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A thermopile transducer made from 76 bismuth/antimony thin-film thermocouples is used for the measurement of heat output from chemical reactions. The method is independent of optical transmission and, therefore, applicable in strongly absorbing or particle-containing liquids. Thermoelectrical voltages up to 30 mV have been measured in sample volumes up to 20 mu l. The influence of the size and shape of the reaction drops can be controlled by modification of the surface and internal electrical calibration. Cerium is detected down to amounts of 5 nmol (7 mu g, 0.25 mmol l(-1)). A further improvement of the analytical limit down to the 10 pmol (0.5 nmol l(-1)) range seems realistic.

引用

页码：83 / 91

页数：9

共 6 条

[1]

AHLERS H, 1990, MIKROELEKTRONISCHE S

[2]

DANS J, 1949, TASCHENBUCH CHEM PHY, P1090

[3]

GUILBEAU EJ, 1987, T AM SOC ART INT ORG, V23, P329

[4]

KESSLER E, 1992, SPIE P, V1712, P132

[5] THERMOELECTRIC ENZYME SENSOR FOR MEASURING BLOOD-GLUCOSE [J].

MUEHLBAUER, MJ ;

GUILBEAU, EJ ;

TOWE, BC ;

BRANDON, TA .

BIOSENSORS & BIOELECTRONICS, 1990, 5 (01) :1-12

[6] CONCENTRATION WAVE PROPAGATION IN 2-DIMENSIONAL LIQUID-PHASE SELF-OSCILLATING SYSTEM [J].

ZAIKIN, AN ;

ZHABOTINSKY, AM .

NATURE, 1970, 225 (5232) :535-+

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