Hanna Instruments HI 83099 - Manual (Page 19)

37 36 Total Chlorine
• Press the Zero key. The meter will show “-0.0-” when the meter is zeroed and ready for measurement.
• Remove the cuvette.
Powder reagents procedure
• Add 1 packet of HI 93711 DPD reagent. Replace the cap and
shake gently for 20 seconds (or 2 minutes for seawater analysis).
• Reinsert the cuvette into the instrument.
• Press Timer and the display will show the countdown prior to the
measurement or, alternatively, wait for 2 minutes and 30 seconds
and press
Read. When the timer ends the meter will perform the
reading. The instrument displays the results in mg/L of total
chlorine.
Liquid reagents procedure
• To an empty cuvette add 3 drops of
HI 93701A-T DPD1 indicator, 3 drops of
HI 93701B-T DPD1 buffer and 1 drop of
HI 93701C DPD3 solution. Swirl gently to
mix and immediately add 10 mL of unreacted
sample. Replace the cap and shake gently
again.
• Reinsert the cuvette into the instrument.
Total Chlorine
TOTAL CHLORINE
SPECIFICATIONS
Range 0.00 to 3.50 mg/L
Resolution 0.01 mg/L
Accuracy ±0.03 mg/L ±3% of reading at 25 °C
Typical EMC ±0.01 mg/L
Deviation
Light Source
Tungsten lamp with narrow band interference filter @ 525 nm
Method Adaptation of the EPA DPD method 330.5. The reaction between the chlorine and the
DPD reagent causes a pink tint in the sample.
REQUIRED REAGENTS
POWDER:
Code
Description Quantity
HI 93711-0 DPD 1 packet
LIQUID:
Code
Description Quantity
HI 93701 A-T DPD1 indicator 3 drops
HI 93701 B-T DPD1 buffer 3 drops
HI 93701 C DPD3 solution 1 drop
REAGENT SETS
HI 93701-T Reagents for 300 total chlorine tests (liquid)
HI 93711-01 Reagents for 100 total chlorine tests (powder)
HI 93711-03 Reagents for 300 total chlorine tests (powder)
For other accessories see page 132.
MEASUREMENT PROCEDURE
• Select the Total Chlorine method using the procedure
described in the Method Selection section (see page 12).
• Fill the 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.
10 mL