Hanna Instruments HI 83225-01 - Manual (Page 54)

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
4
2 ¯).
INTERFERENCES
Interferences may be caused by:
Calcium (as CaCO
3
) above 20000 mg/L
Chloride (as Cl - ) above 40000 mg/L
Magnesium (as MgCO
3
) above 10000 mg/L
Silica (as SiO
2
) 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