A simple device for quantitative colorimetric diffuse reflectance measurements

被引：43

作者：

Matias, FAA ^{[1
]}

Vila, MMDC ^{[1
]}

Tubino, M ^{[1
]}

机构：

[1] Univ Estadual Campinas, Inst Quim, BR-13083970 Campinas, SP, Brazil

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2003年 / 88卷 / 01期

基金：

巴西圣保罗研究基金会;

关键词：

reflectance; spot test; chemical analysis; quantitative analysis;

D O I：

10.1016/S0925-4005(02)00309-X

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A very simple and low cost reflectometer, for colorimetric diffuse reflectance measurements is described. The proposed instrument uses a light dependent resistor (LDR), as a sensor, and a light emitter diode (LED), as light source. The performance of the device was compared with that of a commercial instrument, measuring the reflectance of the Pantone(R) Process Black Uncoated Palette. The quantitative analysis of nickel, in a catalyst, using dimethylglyoxime as colorimetric reagent, was also used to test the device. The observed precision was about 6% (R.S.D.). These results were compared with those obtained by the gravimetric method using the same reaction, through the statistical Student's t-test procedure. A complete agreement was observed. The good quality of all the obtained results allows the recommendation of the instrument for diffuse reflectance measurements including quantitative analytical procedures. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：60 / 66

页数：7

共 33 条

[1]

ALKILDAS AC, 1984, 840412 SAE, P85

[2] EVALUATION OF ACCURACY IN PHOTOMETRIC ANALYSIS [J].

AYRES, GH .

ANALYTICAL CHEMISTRY, 1949, 21 (06) :652-657

[3]

Budavari S., 1996, MERCK INDEX ENCY CHE, P1117

[4] AN INEXPENSIVE POCKET REFLECTOMETER FOR SEMIQUANTITATIVE SPOT-TEST ANALYSES [J].

DIEMANN, E .

JOURNAL OF CHEMICAL EDUCATION, 1989, 66 (07) :595-596

[5]

ECKSCHLAGER K, 1972, ERRORS MEASUREMENTS, P107

[6]

Feigl F., 1972, SPOT TESTS INORGANIC, V6th

[7]

FEIGL F, 1966, SPOT TESTS ORGANIC A

[8] THE SENSITIVITY OF PHOTOCONDUCTOR RECEIVERS FOR LONG-WAVELENGTH OPTICAL COMMUNICATIONS [J].

FORREST, SR .

JOURNAL OF LIGHTWAVE TECHNOLOGY, 1985, 3 (02) :347-360

[9] Quantitative measurements of ammonium, hydrogenophosphate and Cu(II) by diffuse reflectance spectrometry [J].

Ghauch, A ;

Rima, J ;

Charef, A ;

Suptil, J ;

Fachinger, C ;

Martin-Bouyer, M .

TALANTA, 1999, 48 (02) :385-392

[10] Use of diffuse reflectance spectrometry in spot test reactions for quantitative determination of cations in water [J].

Ghauch, A ;

Turnar, C ;

Fachinger, C ;

Rima, J ;

Charef, A ;

Suptil, J ;

Martin-Bouyer, M .

CHEMOSPHERE, 2000, 40 (12) :1327-1333

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