Hanna-instruments HI 83225 Manual de usuario descargar pdf (Pagina 54)

• Add the content of one packet of HI 93751-0

Indicator reagent.

• Replace the cap and invert gently to mix for

1 minute (about 30 inversions).

• Reinsert the cuvette into the instrument.

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

for 5 minutes and press Read. When the timer ends the meter will perform the reading.

• The instrument displays concentration in mg/L of Sulfate (SO

¯).

INTERFERENCES

Interferences may be caused by:

Calcium (as CaCO

) above 20000 mg/L

Chloride (as Cl

) above 40000 mg/L

Magnesium (as MgCO

) above 10000 mg/L

Silica (as SiO

) above 500 mg/L

Color or suspended matter in large amounts will interfere: suspended matter should be removed by previous

filtration.

Organic matter in large amounts may impede the precipitation of barium sulfate.

Sulfate

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Hanna-instruments HI 83225 Manual de usuario Pagina 54