Practical handling advice about the calibration of spectrophotometers!

All Potassiumdichromate filters in perchloric acid
UV60, 600, 14, 20, 40, 80, 100

UV1 Potassium chloride 1.2% (Solvent water)

UV5 Holmium oxide 4% (solvent 10% perchloric acid)

UV6 Toluene (0.001%) (solvent n-hexane)
UV9 pure hexane

UV10 Sodium iodide 1% (Solvent water)

UV11 Sodium nitrite 5% (Solvent water)

UV12 ultrapure water