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2005
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In the Laboratory
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Cost-Effective Teacher
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Automatic Low-Cost Data Acquisition from Old Polarimetric Instruments
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Giuseppe Alibrandi and Santi D'Aliberti
Dipartimento di Chimica Inorganica, Chimica Analyticia e Chimica Fisica, Università di Messina, 98166, Messina, Italy
Salvatore Coppolino and Antonino Villari
Dipartimento Farmaco-Chimico, Facoltà di Farmacia, Università di Messina, 98168 Messina, Italy
Norberto Micali
Istituto per i Processi Chimico-Fisici, Sez. Messina, CNR, 98100 Messina, Italy
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March 2005
Vol. 82 No. 3
p. 442
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| Abstract |
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This article describes the design of an apparatus that allows the digital acquisition of polarimetric data from a Lippich polarimeter. This apparatus consists of a low-cost telecamera applied to the ocular of a double-field polarimeter and connected to a PC. The camera is able to reveal with high sensibility the difference in brightness in the two fields allowing more accurate analytical data to be obtained, without need for the analyser to be rotated. This apparatus allows the execution of either single observations or kinetics, because it is able to save previously obtained analytical data. Experimental tests of the apparatus were performed by measuring the rotation angle of solutions of (–)-adrenaline and by following the kinetics of the acid-catalyzed hydrolysis of sucrose.
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| More Information |
 Citation |
Alibrandi, Giuseppe; D'Aliberti, Santi; Coppolino, Salvatore; Villari, Antonino; Micali, Norberto. J. Chem. Educ. 2005 82 442.
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Keywords |
Instrumental Methods; Kinetics; Quantitative Analysis
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History |
Created:
Last Updated: |
February 2, 2005
February 16, 2005
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| Home > JCE Print > Journal of Chemical Education > Issues >
2005
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March
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442
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