Performance of a Low-Cost Miniature CCD Spectrometer
Author Information
Author(s): Simon Coles, Malcolm Nimmo, Paul J. Worsfold
Primary Institution: University of Plymouth
Hypothesis
Can a low-cost miniature CCD spectrometer perform comparably to conventional benchtop instruments?
Conclusion
The miniature spectrometer is portable, low-cost, and suitable for field deployments, with acceptable performance in key analytical parameters.
Supporting Evidence
- The miniature spectrometer showed good wavelength repeatability with a maximum deviation of less than 1.5 nm over 5 weeks.
- Photometric linearity was high, with a correlation coefficient of r = 0.9999 for absorbance values.
- Instrumental noise was acceptable for absorbance levels between 0.5 and 1.5 a.u.
- Drift was observed at 0.019 a.u. h-1, which is higher than that of benchtop instruments.
Takeaway
This study shows that a small, cheap spectrometer can work well in the field, helping scientists measure things without needing a big lab.
Methodology
The study evaluated the miniature CCD spectrometer's performance in terms of wavelength repeatability, photometric linearity, instrumental noise, and drift, comparing it to a benchtop spectrophotometer.
Limitations
The miniature spectrometer's performance may be affected by significant external temperature fluctuations, requiring periodic recalibration.
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