— Concentration of majority of metal atoms is measured using AAS (Atomic Absorption Spectrophotometer) by measuring the absorption of radiant energy by free metal atoms in the sample. The present paper emphasizes on controlling and monitoring of factors effecting this free atom concentration in flame AAS (FAAS) using Lab VIEW and an AVR based embedded system. These factors include flame temperature, fuel-oxidant aspiration rate, and fuel-oxidant ratio of the flame. These parameters are controlled and monitored by a 32-bit AVR microcontroller has been used to interface the instrument under control i.e. AAS to Lab VIEW through serial interface protocol RS 232. The purpose of this work is for the further perfection of the atomic absorption method of analysis by introducing a feedback between the result of analysis of any sample and the procedure of analysis of this sample. It was possible only by introducing the principle of self-tuning. The complete system monitors all safety interlocks and controls the required process parameters with the pre-set values and accomplishes appropriate flame conditions for uniform sample atomization.
— Atomic absorption spectrophotometer, DSC module, flame controller module, lab VIEW, RS 232, flame controller module.
The authors are with the E.I.E Dept, VNR VJIET, Hyderabad, A.P, India (e-mail: email@example.com).
Cite: Bharati Sagi, Hari Krishna M., and S. Raja Rathnam, " LabVIEW Controlled Flame Atomizer for Atomic Absorption Spectrophotometer," International Journal of Innovation, Management and Technology vol. 4, no. 6, pp. 614-618, 2013.