References for UV-Visible Spectroscopy

UV-Visible spectroscopy is probably the most widely used instrumental techniques in analytical chemistry, especially in the life sciences. As such, it is one of the most regulated, by pharmacopoeias and quality assurance bodies world-wide. Starna supplies the world’s widest range of Certified Reference Materials for the qualification of UV-Visible Spectrophotometers to help instrument users achieve compliance – with confidence.

Instrument Qualification Kits - Tools for Easier Compliance

Starna offer several Instrument Qualification Kits to assist with the qualification of a UV-Visible Spectrophotometer in the ultraviolet region of the spectrum. Kits are tailored to the requirements of Pharmacopoeias and other Quality Assurance bodies.

 

Absorbance References

Potassium Dichromate (235-430 nm) - the most widely used reference for absorbance accuracy – accepted by all major Pharmacopoeias

Nicotinic Acid (210-260 nm) – for the widely used far UV

Deep UV Reference (190-220 nm) – qualification in the deep UV: unique to Starna

Starna Green (250-650 nm) - absorbance and wavelength for instruments with bandwidths >5nm

Metal-on-Quartz Neutral Density Filters (250-635 nm) - durable glass filters with UV capability

Neutral Density Filters (440-635nm) - glass filters with absorbances from 0.04 A to 3.5 A

Combined Holmium/Neutral Density glass (360 - 640 nm) – 1 A absorbance check with wavelength calibration NEW!

Combined Didymium/Neutral Density glass (430 - 890 nm) – 1 A absorbance check with wavelength calibration NEW!

 

Wavelength References


Holmium Oxide Liquid (240-650 nm)
 - the most widely used reference for absorbance accuracy – accepted by all major Pharmacopoeias

Didymium Oxide Liquid (290-870 nm) – useful peaks in the NIR

Combined Holmium/Didymium Oxide Liquid (240 to 795 nm) – evenly spaced peaks over the range NEW!

Holmium Oxide Glass (270-640 nm) – more robust and useful for routine checks  

Didymium Glass (430 - 890 nm) – more robust and useful for routine checks

Combined Holmium/Neutral Density glass (360 - 640 nm) wavelength calibration with 1 A absorbance check NEW!

Combined Didymium/Neutral Density glass – (430 - 890 nm) - wavelength calibration with 1 A absorbance check NEW!

Rare Earth Far UV (200-300 nm) - a convenient way of qualifying spectrophotometers in the far UV.

Deep UV Reference (190-220 nm) – qualification in the deep UV: unique to Starna

Starna Green (250-650 nm) - for instruments with wider bandwidths (>5nm)

Samarium Oxide Liquid (230 – 560 nm) –l for the commonly used region from 200 nm to 500 nm.

Stray Light (Stray Radiant Energy) References


Stray Light Cut-off Filters –Specified Wavelength Method
 – accepted by European and most other Pharmacopoeias

Stray Light Cut-off Filters – Filter Ratio Method – recommended by US Pharmacopeia NEW!

 

Resolution (Spectral Bandwidth) References


Toluene in Hexane  (265 – 270 nm)-
 the most widely used resolution reference – accepted by all major Pharmacopoeias

Toluene in Methanol (265 – 270 nm) -European Pharmacopoeia (EP)resolution check in Derivative Spectroscopy.

Benzene vapour (230-270 nm– a check for instruments with spectral bandwidths less than 1 nm