Iron, Total
Iron, Total
IronTot_AVPP_Other_TPT_Eng_Ody.fm Page 5 of 6
3. Touch On. Touch Adjust to accept the displayed concentration. If an alternate
concentration is used, touch the number in the box to enter the actual
concentration, then touch
OK. Touch Adjust.
See Section 3.2.4 Adjusting the Standard Curve on page 40 for more information.
Method Performance
Precision
Standard: 1.000 mg/L Fe
See Section 3.4.3 Precision on page 44 for more information, or if the standard
concentration did not fall within the specified range.
Sensitivity
See Section 3.4.5 Sensitivity on page 44 for more information.
Summary of Method
The TPTZ Iron Reagent forms a deep blue-purple color with ferrous iron. The
indicator is combined with a reducing agent which coverts precipitated or
suspended iron, such as rust, to the ferrous state. The amount of ferric iron
present can be determined as the difference between the results of a ferrous iron
test and the concentration of total iron. Test results are measured at 590 nm.
Required Reagents
Quantity Required
Description per test Unit Cat. No.
TPTZ Iron Reagent Powder Pillows (for 10-mL sample)....................2 pillows......... 100/pkg.............26087-99
or
TPTZ Low Range Iron Reagent AccuVac
®
Ampuls ............................1 ampule......... 25/pkg...............25100-25
Required Apparatus
Sample Cells, 10-20-25 mL, w/cap.........................................................2....................... 6/pkg.................24019-06
Beaker, 50-mL............................................................................................1 ....................... each.................... 500-41H
Optional Reagents and Standards
Iron Standard Solution, 100-mg/L Fe.............................................................................. 100 mL...............14175-42
Iron Standard Solution, 10-mL Voluette
®
Ampule, 25-mg/L Fe................................. 16/pkg...............14253-10
Water, deionized ................................................................................................................. 4 liters ....................272-56
Program 95% Confidence Limits of Distribution
270 0.983–1.017 mg/L Fe
272 0.985–1.015 mg/L Fe
Program Portion of Curve ∆Abs ∆Concentration
270 Entire range 0.010 0.012 mg/L Fe
272 Entire range 0.010 0.012 mg/L Fe
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