3. Fill a sample cell with 10 mL of deionized water (the blank). Note: Rinse all glassware with 1:1 Nitric Acid Solution. Rinse again with deionized water.
3. Fill a sample cell with 10 mL of deionized water (the blank).Note: Rinse all glassware with 1:1 Nitric Acid Solution. Rinse again with deionized water.