Hanna-instruments HI 83211 Manuel d'utilisateur télécharger pdf (Page 22)

Ammonia LR

• Remove the cuvette.

• Add 4 drops of HI 93700A-0 First Reagent (6 drops for

seawater analysis). Replace the cap and mix the solution.

• Add 4 drops of HI 93700B-0 Second Reagent (10 drops for

seawater analysis). Replace the cap and mix the solution.

• Reinsert the cuvette into the instrument.

• Press Timer and the display will show the countdown prior to the

measurement or, alternatively, wait for 3 minutes and 30 seconds and

press Read. When the timer ends the meter will perform the reading.

The instrument displays the results in mg/L of ammonia nitrogen

(NH

-N).

• Press  or  to access the second level functions.

• Press the Chem Frm key to convert the result in mg/L of ammonia (NH

) and ammonium (NH

• Press  or  to return to the measurement screen.

INTERFERENCES

Interference may be caused by: acetone, alcohols, aldehydes, glycine, hardness above 1 g/L, iron, organic

chloramines, sulfide, various aliphatic and aromatic amines.

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Hanna-instruments HI 83211 Manuel d'utilisateur Page 22