Hanna-instruments HI 83203 Manual do Utilizador descarregar pdf (Página 35)

• Reinsert the cuvette into the instrument.

• Press Timer and the display will show the countdown prior to the measurement or, alternatively, wait

for 6 minutes and press Read. When the timer ends the meter will perform the reading. The instrument

displays concentration in mg/L of nitrite.

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

• Press the Chem Frm key to convert the result in mg/L of nitrogen-nitrite (NO

¯-N) and sodium nitrite

(NaNO

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

INTERFERENCES

Interference may be caused by the following ions:

ferrous, ferric, cupric, mercurous, silver, antimonious, bismuth, auric, lead, metavanadate and chloroplatinate.

Strongly reducing and oxidizing reagents.

High levels of nitrate (above 100 mg/L) could yield falsely high readings due to a minute amount of

reduction to nitrite that could occur at these levels.

Nitrite LR

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Hanna-instruments HI 83203 Manual do Utilizador Página 35