Over time, spectrometers will naturally drift due to environmental effects and influences. This is a common issue that can easily be addressed by regular wavelength calibration which helps to ensure reliable and accurate spectroscopic results.
How is Wavelength Calibration Performed?
Wavelength calibration of a spectrometer is performed by scanning through grating angles and measuring spectrum with wavelengths which are already known. The measured wavelength and the known wavelength can be compared and the drift can be found.
The standard method for wavelength calibration is the peak method, which is used for the calibration of push-broom imaging spectrometers by recording the digital number values of wavelengths and the Gaussian fitting of the wavelengths which results in the pixel center wavelength being found by calculating the highest response.
Many factors can affect the measurement, meaning the wavelength calibration process must correct the energy at the corresponding position during subsequent calibration data processing. The correction method is then usually employed to re-measure the position of the energy change.
Importance of Wavelength Calibration Standards
Wavelength calibration standards are a critical part of accuracy in general spectroscopy. This means that the standards must have extremely high levels of purity. The analytical standards must also have low-reactivity so that they will not have any unplanned reactions with substances in solutions. Analytical substances must also be unlikely to absorb moisture from the air, as masses need to stay uniform. It is also important for analytical standards to be cost-effective as testing is normally performed multiple times per sample.
Wavelength calibration standards offer stable absorption spectra for validating the wavelength calibration of spectrometers. Each standard is formulated with a rare earth oxide that exhibits sharp absorption peaks at specific wavelengths.
Wavelength Calibration Standards from Inorganic Ventures
Inorganic Ventures provides wavelength calibration standards both pre-made and customizable as per customer requirements. Our ready-to-use wavelength calibration standards simplify industry, require little training and waste less whilst improving accuracy of calibration. Our customizable wavelength calibration standards are extremely flexible and can be tailored specifically for the customer needs.
To ensure the accuracy in spectroscopy, wavelength calibration is critical. Inorganic Ventures has extensive expertise in wet chemistry and analysis, providing certified reference materials and an extensive range of calibration standards.
Inorganic Ventures use starting materials of the highest purity, adhering to quality assurance guidelines . Our wavelength calibration standards are fully NIST-traceable and created to exact specifications. If you would like to find out more about the wavelength calibration standards that we offer, contact us today.