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| 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 | |
| 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 | |
| Samarium Perchlorate | Good for UV and resolution in UV | |
| 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 |