Hanna Instruments HI 83200C - Manual (Page 61)

120 121
10 mL
• 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
12
3
6
9
1’
SPECIFICATIONS
Range 0 to 100 mg/L
Resolution 5 mg/L
Accuracy ±5 mg/L ±3% of reading at 25 °C
Light Source Tungsten lamp with narrow band interference filter @ 466 nm
Method Sulfate is precipitated with barium chloride crystals. Light absorbance of the suspension
is measured.
REQUIRED REAGENTS
Code Description Quantity
HI 93751-0 Indicator reagent 1 packet
REAGENT SETS
HI 93751-01 Reagents for 100 tests
HI 93751-03 Reagents for 300 tests
For other accessories see page 128.
MEASUREMENT PROCEDURE
Note: for sample preparation follow the COLORED OR TURBID SAMPLES procedure on page 17.
• Select the Sulfate method using the procedure described
in the Method Selection section (see page 12).
• Fill a cuvette with 10 mL of unreacted sample (up to
the mark) and replace the cap.
• Place the cuvette into the holder and close the lid.
• Press the Zero key. The display will show “-0.0-” when the meter is zeroed and ready for
measurement.
• Remove the cuvette.
Sulfate
SULFATE