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Contaminant Detection Using Microcontrolled Fluorimeter

Jyothi, K.L and Kavya, B.Sridhar and Keerthini, M.V and Vani, K.R. (2004) Contaminant Detection Using Microcontrolled Fluorimeter. [Student Project Report]

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Abstract

This Dissertation / Report is the outcome of investigation carried out by the creator(s) / author(s) at the department/division of Central Food Technological Research Institute (CFTRI), Mysore mentioned below in this page.

Item Type: Student Project Report
Additional Information: This investigation presents a technique to detect contaminants like pesticides using fluorescence concepts. Fluorescence is the phenomenon in which absorption of light of a given wavelength by a fluorescent molecule is followed by the emission of light at longer wavelengths. Fluorescence detection has three major advantages over other light-based investigation methods like sensitivity, high speed, and safety. Intensity of fluorescence signal is proportional to the concentration of the substance being investigated. Using fluorescence, one can monitor very rapid changes in concentration. Living tissue can be investigated with no adverse effects on its natural physiological behavior. The essential blocks of the device are the fluorimeter and the microcontroller. The principal elements of a fluorimeter are a light source, filters to select appropriate excitation and emission wavelengths, a compartment to house the sample and a photodetector such as PMT. The microcontroller used here is 8052, which is 8-bit microcontroller with 8Kbytes of downloadable Flash programmable and erasable read-only memory and 2Kbytes of EEPROM. The program was developed using 8051 assembler and cross-compiler. The performance of the system developed was evaluated for two wavelengths and tested.
Uncontrolled Keywords: Contaminant Detection Microcontrolled Fluorimeter Microcontroller
Subjects: 600 Technology > 02 Engineering & allied operations
Divisions: Central Instrumentation Facility Services
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 08 Jun 2005
Last Modified: 28 Dec 2011 09:24
URI: http://ir.cftri.com/id/eprint/47

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