Hanna Instruments HI 83099 - Manual (Page 63)

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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 132.
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
10 mL
Silver
• Press the Zero key. The display will show “-0.0-” when the meter is zeroed and ready for
measurement.
• Fill a second cuvette up to the mark with 10 mL of the reacted sample.
• Add 3 drops of Dispersing Agent (HI 93703-51),
replace the cap and invert gently to mix for about
10 seconds.
• Insert the second cuvette into the instrument.
• Press Read to start the reading. The instrument displays the results in mg/L of silver.
INTERFERENCES
Interference may be caused by:
Al 3+ above 30 mg/L Fe 2+ above 1.5 mg/L
Ca 2+ above 1000 mg/L as CaCO
3
Fe 3+ above 10 mg/L
Cd 2+ above 20 mg/L K + above 500 mg/L
Cl¯ above 8000 mg/L Mn 2+ above 25 mg/L
Co 2+ above 1.5 mg/L Mg 2+ above 1000 mg/L as CaCO
3
Cr 3+ above 20 mg/L Na + above 5000 mg/L
Cr 6+ above 40 mg/L Ni 2+ above 1.5 mg/L
Cu 2+ above 15 mg/L Pb 2+ above 20 mg/L
F¯ above 20 mg/L Zn 2+ above 30 mg/L
10 mL
# 2
# 2