PASCO EZ-2333A Nitrate ezSample - Manual

Nitrate ezSample™ (EZ-2333A)
0.25-2.00 ppm (mg/L) as N
Instrument Set-up
The PASPort Water Quality Colorimeter is specifically designed to support PASCO’s ezSample™ test kits. Set up
the PASPort Water Quality Colorimeter according to the equipment instructions. Set your display to read both
high and low nitrate values. If the readings are above 1.0 mg/L, then use the Nitrate High reading (Nitrate High
(H)). If the readings are below 1.0 mg/L, use the Nitrate Low reading (Nitrate Low (L)). Readings at 1.0 mg/L are
accurate on both scales.
The calibration procedure is listed on the equipment instruction card.
Safety Information
Read the Material Safety Data Sheet (MSDS) before performing this test procedure. Wear safety glasses and
disposable gloves.
Test Procedure
1. Fill the reaction tube (green screw cap tube) to the 15 mL mark with the sample to be
tested.
2. Empty the contents of one Zinc Foil Pack into the reaction tube. Cap the reaction tube
and shake it vigorously for exactly 2 minutes. (fig. 1)
3. Add 10 drops of A-6901 Acidifier Solution to the empty 25 mL sample cup (fig. 2).
Figure 1
4. Pour the treated sample from the reaction tube into the sample cup,
being careful not to transfer any solid material to the sample cup.
NOTE: Getting a small amount of solid material into the
sample cup will not affect the results
5. Place the ezSample Snap Vial (ampoule) in the sample cup. Snap the tip by
pressing the ampoule against the side of the cup. The ampoule will fill
leaving a small bubble to facilitate mixing (fig 3).
6. Mix the contents of the ampoule by inverting it several times, allowing the
bubble to travel from end to end. Dry the ampoule and wait 10 minutes for
color development
Figure 2
7. Use the PASPort Water Quality Colorimeter to measure the concentration
value of the ampoule
Figure 3
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012-10109D
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