Automation of a Plane Grating Spectrograph
Author Information
Author(s): Carlos Roberto Bellato, Jarbas J. R. Rohwedder, Ivo M. Raimundo Jr., Celio Pasquini
Primary Institution: Instituto de Química, Universidade Estadual de Campinas
Hypothesis
Can a traditional plane grating spectrograph be automated to improve its functionality and ease of use?
Conclusion
The automated spectrograph can perform qualitative and quantitative analyses effectively while being simple to operate.
Supporting Evidence
- The automated spectrograph achieved a spectral resolution of 0.05 nm at 443 nm.
- Emission lines for Sn and Cu were accurately localized at concentrations as low as 0.006% and 0.03%, respectively.
- The automation allows for a user-friendly interface and graphical display of data.
- Quantitative results for Mn in steel and Pb in aqueous solutions were successfully obtained.
Takeaway
This study shows how an old type of spectrograph can be updated with new technology to make it easier to use and more accurate.
Methodology
The spectrograph was automated by replacing the film detection system with a photodiode array and controlling functions through a microcomputer interface.
Limitations
The automation process requires a longer time to scan a complete spectrum, which can be a drawback for quick analyses.
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