Hanna Instruments HI 83200C User Manual
Page 45
88
89
Nitrate
SPECIFICATIONS
Range
0.0 to 30.0 mg/L
Resolution
0.1 mg/L
Accuracy
±0.5 mg/L ±10% of reading at 25 °C
Typical EMC
±0.1 mg/L
Deviation
Light Source
Tungsten lamp with narrow band interference filter @ 525 nm
Method
Adaptation of the cadmium reduction method. The reaction between nitrate and the
reagent causes an amber tint in the sample.
REQUIRED REAGENTS
Code
Description
Quantity
HI 93728-0
Powder reagent
1 packet
REAGENT SETS
HI 93728-01 Reagents for 100 tests
HI 93728-03 Reagents for 300 tests
For other accessories see page 128.
MEASUREMENT PROCEDURE
• Select the
Nitrate method using the procedure described in the
Method Selection section (see page 12).
• Using the pipette, fill the cuvette with 6 ml of sample, up to
half of its height, 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 and add the content of one packet of HI 93728-0
reagent.
NITRATE
INTERFERENCES
Interference may be caused by:
Co
2+
must not be present
Fe
2+
must not be present
Al
3+
above 32 mg/L
Ca
2+
above 1000 mg/L (as CaCO
3
)
Cd
2+
above 20 mg/L
Cl¯ above 8000 mg/L
Cr
3+
above 20 mg/L
Cr
6+
above 40 mg/L
Cu
2+
above 15 mg/L
F¯ above 20 mg/L
Fe
3+
above 10 mg/L
K
+
above 500 mg/L
Mg
2+
above 400 mg/L
Mn
2+
above 25 mg/L
Mo
6+
above 60 mg/L
Na
+
above 5000 mg/L
Pb
2+
above 20 mg/L
Zn
2+
above 30 mg/L
Nickel LR
6 mL