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Iron, Total
For water, wastewater, and seawater
TPTZ Method*
Measuring Hints
•
Testing generally does not require digestion, however if the sample contains
particulate matter, digestion is required for total iron measurement.**
•
If samples cannot be analyzed immediately, see
page
1—26.
•
Wipe sample cells with a soft, dry cloth before placing in the instrument.
•
After adding TPTZ reagent, a blue color will form if iron is present.
Note:
The Pocket Colorimeter™ II is designed to measure solutions contained in sample cells.
dip the meter in the sample or pour the sample directly into the cell holder.
DO NOT
* Adapted from G. Frederic Smith Chemical Co., 1980, The Iron Reagents, 3rd ed.
** See the Hach Water Analysis Handbook for further information concerning digestions.
(0.01 to 1.70 mg/L Fe)
Sampling and Storage on
1—17
Method 8112
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