EN
Gently add 10 mL of sample to a photometer tube.
Add a Glycine tablet. Then, very gently, crush and stir.
Use this to "blank" the instrument. Place in cell holder and press Blank.
Gently pour a few drops of this into a second tube.
Add a DPD 1 tablet to those drops. Then, crush to form a paste.
Gently pour the remaining sample into this tube.
Place in the cell holder and press Measure to obtain the concentration of Chlorine Dioxide.
