How can I check accuracy on the APA6000 with a standard?

Document ID

Document ID TE2358

Published Date

Published Date 12/04/2019
Question
How can I check accuracy on the APA6000 with a standard?
Summary
APA6000 and accuracy check
Answer
A 10mg/l standard solution for testing the Monochloramine APA can be easily prepared, as follows:
  1. Add 5 ml of Reagent 3 solution (Hypochlorite reagent) to a volumetric flask or graduated cylinder.
  2. Dilute to 200 ml with Standard 2 solution (2 mg/l Ammonia as N).
  3. Mix thoroughly and deliver to the analyser in place of sample.
  4. The reading on the APA should be 10 mg/l Monochloramine as Cl2, 0 mg/l Ammonia.  (Hypochlorite reagent has a nominal concentration of approximately 600 mg/l Cl2.)