Hanna Instruments Marine Ammonia Checker – HI784

Ammonia Checker Tips & Tricks for Accurate Measurements

• Ensure the sample does not contain any debris.
• Hold dropper bottles completely vertically and squeeze slowly to ensure correct drop size.
• Whenever the cuvette is placed into the checker, it must be dry outside and free of fingerprints, oil and dirt.
• Wipe the cuvette thoroughly with HI731318 microfiber cleaning cloth or a lint-free cloth prior to insertion.
• Shaking the cuvette can generate bubbles, causing higher readings. To obtain accurate measurements, remove such bubbles by swirling or by gently tapping the cuvette.
• Do not let the reacted sample stand too long after reagent has been added, as accuracy will be affected.
• Discard the sample immediately after the reading has been taken or the glass might become permanently stained.
• Prepare sample cuvette immediately after collecting sample from tank. Ammonia is volatile and will dissipate if stored in a bottle before analysis, causing low measurements.
• If the prepared sample cuvette becomes cloudy the measurement will not be accurate.
• Prepare a new sample by adding an extra 1-2 drops of HI784A-0 Reagent.