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UV-VIS References
- Instrument Qualification Kits
- Absorbance
- Potassium Dichromate (235-430 nm)
- Nicotinic Acid (210-260 nm)
- Neutral Density Filters (440-635nm)
- Metal-on-Quartz Neutral Density Filters (250-635 nm)
- Starna Green (Broadband SBW instruments) (250-650 nm)
- Deep UV Reference (190-220 nm)
- Combined Holmium/Neutral Density glass
- Combined Didymium/Neutral Density glass
- Wavelength
- Holmium Oxide Liquid (240-650 nm)
- Cerium Oxide Solution (200-300 nm)
- Didymium Oxide Liquid (290-870 nm)
- Combined Holmium/Didymium Solution
- Holmium Oxide Glass (240-640 nm)
- Didymium Glass Filter (430 nm to 890 nm)
- Starna wide-range wavelength reference (335 – 1945 nm)
- Starna Green (Broadband SBW instruments) (250-650 nm)
- Deep UV Reference (190-220 nm)
- Samarium Oxide Liquid (230-560 nm)
- Combined Holmium/Neutral Density glass
- Combined Didymium/Neutral Density glass
- Stray Light
- Resolution/Bandwith
Cyclohexane reference
Purpose
This reference material may be used to qualify the wavelength scale of Raman Spectrometers between 380 cm-1 and 3000 cm-1. It is cited for this purpose in ASTM E1840 - 96(2014).
Description and Discussion
Reagent grade cyclohexane, permanently sealed by heat fusion into a 10 mm quartz cuvette.
Compared to atomic emission lines, Raman shift standards offer an easier-to-use alternative for qualifying the wavelength scale of Raman Spectrometers. They are also independent of laser frequency. The Raman shift values for cyclohexane have been accurately measured and it is widely used as a reference material. The permanently sealed cuvette eliminates the hazards associated with handling this volatile,toxic and highly flammable material. Using an excitationwavelength of 514.5 nm, 11 shift values covering a range from 384.1 to 2938.3 cm-1 can be identified.
Raman Spectroscopy
Cyclohexane Wavelength Reference (380 cm-1 – 3000 cm-1)
Wavelength qualification of Raman spectrometers. Cited in ASTM 1840- 96 (2014)