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Vol. 140, No. 5, May 2012, pp. 115-123




Design of Optoelectronic System Using Multi Wavelength Illuminator for the Analysis of Sodium Ion in Blood Serum


1 K. Murugananthan, 1 R. Raghoonathan, 2 K. Chakrapani and 3 P. Neelamegam

1 PG and Research Department of Physics, A.V.V.M Sri Pushpam College (Autonomous),

Poondi-613 503, Thanjavur, Tamil Nadu, India

2 Scholl of computer science, SASTRA University, Thanjavur 613 402, Tamil Nadu, India

 3 Department of Electronics & Instrumentation Engineering,

SASTRA University, Thanjavur 613 402, Tamil Nadu, India

E-mail: drkmsys@yahoo.com, neelkeer@yahoo.com


Received: 3 April 2012   /Accepted: 23May 2012   /Published: 31May 2012


Digital Sensors and Sensor Sysstems


Abstract: This paper explains a portable and inexpensive Multi Wavelength Illuminator based optoelectronic system for the measurement of concentration of sodium ion in human blood serum. The Measurement system is developed using a Multi wavelength Illuminator LED lamp (OTLA-0100) as the light source, photodiode as the detector and the LPC2136 microcontroller for data acquisition and the processing unit. Algorithm is developed to monitor, to control the process sequences and transmit data to PC via serial communication module using RS232 protocol. Statistical analyses are carried out to evaluate the performance of the developed instrument and results are compared with that of a conventional instrument (ELDEX-3.8). Linear regression analysis reveals the excellent correlation with correlation coefficient(r) values of 0.99889. No precise differences are observed between the methods by the t-test and F-test results. The t-test and F-test values are 0.436619 and 0.998097 respectively. The chi-square test is also performed to check the significance of obtained results against the conventional method. The developed system shows the good performance and the results are in good agreement with the current clinical method at 98% confidence level.


Keywords: Spectrophotometry, LPC2136, Sodium, OTLA-0100LED, Clinical sample



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