DR/2400
Nitrite
Nitrite_UniCell_Low_DAZ_Eng_Ody.fm Page 1 of 4
• Clean the outside of the vial before placing it in the instrument. Wipe with a damp towel, followed by a dry one.
• Use the standard solution or standard addition method for a proof of accuracy. (See Accuracy Check).
• See 3.2.4 on page 40 for information on calibration curve adjustment.
• Underrange appears on the display when the instrument is zeroed or when the determined sample concentration is below the
operating range listed for this method.
Nitrite
Diazotization Method*
* Reagent sets for this method are only available in Europe.
UniCell™ Vials
(0.020 to 0.600 mg/L NO
2
–
–N)
Scope and Application: For water, wastewater, and seawater
1. Touch
Hach Programs.
Select program
807 Nitrite, HCT 116
Touch Start.
2. Pipet 4.0 mL of
sample into a sample vial.
3. Immediately screw a
green UniCap A
(HCT 116 A) onto the
sample vial.
Close the UniCap bottle
immediately after use.
4. Invert the sample vial
repeatedly until the
reagent in the cap is
completely dissolved.
Tips and Techniques
UniCell Vials
Hach Programs
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