5063-6521 – OQ/PV standards kit-2, for UV/VIS spectrophotometer (1×10 mL perchloric acid, 1×10 mL holmium oxide in perchloric acid)

5063-6503 – OQ/PV Standards kit-1 for UV/VIS (14 x 10 mL ampoules including potassium dichromate (2 each of 60 + 600 mg/L in sulfuric acid); 4 x sulfuric acid blank, sodium nitrite, sodium iodide, potassium chloride, 2 x n-Hexane blank and 10 mL toluene in hexane)