Taylor - Model K-0432 - Reagent - Brochure

Reagent Pack, Buret, Hardness (calcium/total), EDTA, 1 mL = 1 mg. Metal ions may cause interference; to prevent, add titrant containing EDTA to sample before buffer and indicator, then test as normal making sure to count drops of titrant added initially in total required to reach endpoint. If interference still occurs, dilute sample with DI water as necessary and retest. Quats may cause interference.