Hanna Instruments HI 83205-2008 - Manual (Page 22)

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• Add 12 drops of the HI 93704-0 reagent to each
cuvette. Replace the caps and shake gently to mix.
• Place the blank (#1) into the holder and close the lid.
• Press TIMER and the display will show the countdown
prior to zeroing the blank. The display will show “-0.0-”
when the meter is zeroed and ready for measurement.
• Remove the blank.
• Insert the cuvette with the reacted sample (# 2) into the
instrument and close the lid.
• Press READ to start the reading. The instrument displays
concentration in µg/L of hydrazine.
Hydrazine
x 12
# 1 # 2
x 12
# 1
# 2
INTERFERENCES
Interference may be caused by:
Highly colored samples
Highly turbid samples
Aromatic amines
Hydrazine
HYDRAZINE
SPECIFICATIONS
Range 0 to 400 µg/L
Resolution 1 µg/L
Accuracy ±4% of full scale
Typical EMC ±2 µg/L
Deviation
Light Source Tungsten lamp with narrow band interference filter @ 420 nm
Method Adaptation of the ASTM Manual of Water and Environmental Technology, method
D1385-88, p-Dimethylaminobenzaldehyde method. The reaction between hydrazine
and the liquid reagent causes a yellow tint in the sample.
REQUIRED REAGENT
Code Description Quantity
HI 93704-0 Liquid Reagent 24 drops
REAGENT SETS
HI 93704-01 Reagents for 100 tests
HI 93704-03 Reagents for 300 tests
For other accessories see page 73.
MEASUREMENT PROCEDURE
• Select the Hydrazine method using the procedure de-
scribed in the Method Selection section (see page 12).
• Fill one cuvette up to the mark with 10 mL of distilled water.
• Place the cap, insert the cuvette # 1 into the holder and
close the lid.
• Press the Blank function key to start adjusting the light level.
The display will show “Blank Done” when the meter is ready
to take a zero measurement.
• Fill a second cuvette with 10 mL of unreacted sample (up to the
mark) and replace the cap.
10 mL
# 1
10 mL
# 2
# 1