PASCO EZ-2331 Iron ezSample Test Kit - Manual

Iron ezSample™ Test Kit (EZ-2331)
1.5-8.0 ppm (mg/L) Fe 2+
Instrument Set-up
The PASPort Water Quality Colorimeter is specifically designed to support PASCO’s ezSample™ chemical test kits.
Set up the PASPort Water Quality Colorimeter according to the equipment instructions. The calibration procedure is
listed in the equipment instruction manual. Calibration may be appropriate, depending on the application or intended
use. Choose the appropriate test routine from the PASPort Water Quality Colorimeter menu.
Safety Information
Read the Material Safety Data Sheet (MSDS) before performing this test procedure. Wear safety glasses and disposable
gloves.
Ferrous Iron Test Procedure
1. Fill the sample cup to the 25 mL mark
with the sample (Figure 1).
2. Immediately snap the tip by pressing
the ezSample Snap Vial (ampoule)
against the side of the cup. The a
will fill leaving a small bubble to
facilitate mixing
(Figure 2).
mpoule
3. Mix the contents of the ampoule by
inverting it several times, allowing the
bubble to travel from end to end, each time.
Wipe all liquid
from the exterior of the ampoule.
Figure 1 Figure 2
4. Wait 1 minute for color development.
5. Read the concentration value of the ezSample ampoule in the PASPort
Water Quality Colorimeter.
Total Iron Procedure
1. Fill the sample cup to the 25 mL mark with the sample
2. Add 5 drops of A-6000 Activator Solution (Figure 3). Stir briefly. Wait 4
minutes.
3. After 4 minutes, stir the sample once again and then perform the Ferrous
Iron Test Procedure using this pretreated sample.
Figure3
Test Method Description
The iron ezSample test method employs the phenanthroline chemistry. 1,2 Ferrous iron reacts with 1,10-phenanthroline
to form an orange-colored complex in direct proportion to the ferrous iron concentration. Total iron is determined by
adding a mixture of thioglycolic acid and ammonia to the sample. This mixture dissolves most forms of particulate iron.
Results are expressed in ppm (mg/L) Fe
2+ .
Various metals will produce high test results. Certain forms of very insoluble iron (magnetite, ferrite, etc.) require the
following digestion procedure in place of the Total Iron test procedure.
®
012-10107D
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