| Standards for UV/Vis Spectrophotometers |
| Photometric Accuracy |
Potassium Dichromate |
Absorbance scale in the UV |
| |
Nicotinic Acid |
Absorbance scale in the Far UV |
| Neutral Density Filters (visible) |
Absorbance/Transmission in the visible |
| Metal on Quartz Filters (UV) |
Absorbance/Linearity in the Far UV |
| DNA/RNA |
260/280 Validation Reference |
| Resolution/Bandwidth |
Toluene in Hexane |
Bandwidth in the UV |
| |
Benzene Vapor |
Resolution in the UV |
| Wavelength References |
Holmium Perchlorate |
Best for both UV and visible |
| |
Didymium Perchlorate |
Best for high wavelength visible |
| Rare Earth |
Best for Far UV |
| NIR |
Best for Near IR |
| Samarium Perchlorate |
Good for UV and resolution in UV |
| Holmium Glass |
Good for UV/Visible |
| Didymium Glass |
Good for Visible |
| Stray Light References |
Many materials available |
Six materials with different cutoffs |
| Standards for Fluoresence Spectrophotometers |
| Quinine Sulfate |
Quinine Sulfate SRM 936a |
Calibration cell for fluorometers |
| Raman Water Reference |
Water filled cuvette |
Calibration cell for fluorometers |
| 6BF Reference Set |
PMMA blocks for calibration |
Calibration cells for fluorometers |
