PASCO EZ-2341 Dissolved CO2 ezSample Field Titrator - Manual

1
012-10115
Dissolved CO
2
ezSample
™ Field Titrator
(EZ-2341)
10–100 ppm (mg/L) CO
2
Safety Information
Read the MSDS before performing this test procedure. Wear safety glasses and disposable gloves.
Sample Pretreatment
If the sample is turbid, it must be filtered prior to performing this test procedure.
Test Procedure
1. Fill the sample cup to the 20 mL mark
with the sample (Figure 1).
2. Add 2 drops of A-1900 Activator
Solution (Figure 2). Stir briefly to mix
the contents of the sample cup.
NOTE: If the sample turns pink, carbon
dioxide is 0 ppm. There is no need to
continue.
3. Gently snap the tip of the ezSample
Snap Vial (ampoule) at the black snap
ring (Figure 3).
NOTE: When the tip is snapped, the flexible
tubing will remain in place on the tapered
neck of the ampoule.
4. Lift the control bar and insert the
ampoule assembly into the titrator
(Figure 4).
NOTE: The rigid sample pipe will extend
approximately 1.5 inches beyond the body of
the titrator.
5. Hold the titrator with the sample pipe
in the sample and press the control bar
firmly, but briefly, to pull in a small
amount of sample (Figure 5). The
contents will turn a PINK color.
NOTE: NEVER press the control bar unless
the sample pipe is immersed in the sample.
6. With the sample pipe in the sample,
press the control bar again briefly to
allow another small amount of sample
to be drawn into the ampoule.
7. After each addition, rock the entire assembly to mix the contents of the ampoule. Watch for a color
change from PINK to
COLORLESS.
8. Repeat steps 6 and 7 until a permanent color change occurs.
9. When the color of the liquid in the ampoule changes to COLORLESS , remove the ampoule from the
Titrator. Hold the ampoule in a vertical position and read the scale opposite the liquid level (Figure 6).
Figure 5
Figure 2 Figure 1
Figure 3 Figure 4
Figure 6