DUAL-WAVELENGTH PHOTOMETRY WITH LIGHT-EMITTING-DIODES - COMPENSATION OF REFRACTIVE-INDEX AND TURBIDITY EFFECTS IN FLOW-INJECTION ANALYSIS

被引：46

作者：

LIU, HH ^{[1
]}

DASGUPTA, PK ^{[1
]}

机构：

[1] TEXAS TECH UNIV,DEPT CHEM & BIOCHEM,LUBBOCK,TX 79409

来源：

ANALYTICA CHIMICA ACTA | 1994年 / 289卷 / 03期

关键词：

FLOW INJECTION; SENSORS; DUAL-WAVELENGTH PHOTOMETRY; LIGHT EMITTING DIODES; REFRACTIVE INDEX EFFECTS; TURBIDITY EFFECTS;

D O I：

10.1016/0003-2670(94)90011-X

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

An approach to compensate for both refractive index and turbidity effects is described. A light emitting diode-based dual-wavelength, double-beam (fully referenced), dual-flow-cell photometric detection system is used. The only requirement is that the analyte yields a product (that can be detected by absorbance measurement) as a result of a reaction which does not affect the optical properties of the suspended matter. The principle is mathematically established and experimentally demonstrated by determining micromolar concentrations of bromthymol blue in samples containing up to 1.5% whole milk and 60% ethanol with an absolute error of < 3.7%.

引用

页码：347 / 353

页数：7

共 15 条

[1]

BELLAMY HS, 1993, TALANTA, V40, P341

[2]

BETTERIDGE D, 1978, ANAL CHEM, V50, pA832, DOI 10.1021/ac50031a001

[3] LIGHT-EMITTING DIODE BASED FLOW-THROUGH OPTICAL-ABSORPTION DETECTORS [J].