Hach DR2400 - Page 352

Iron, Total
© Hach Company, 2003. All rights reserved. Printed in the U.S.A. 3/04 1ed
Page 4 of 4 IronTot_PP_Other_FMO_Eng_Ody.fm
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Call 800-227-4224
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Method Performance
Precision
Standard: 1.00 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
FerroMo Iron Reagent 1 contains a reducing agent combined with a masking
agent. The masking agent eliminates interference from high levels of molybdate.
The reducing agent converts precipitated or suspended iron, such as rust, to the
ferrous state. FerroMo Iron Reagent 2 contains the indicator combined with a
buffering agent. The indicator reacts with ferrous iron in the sample, buffered
between pH 3 and 5, resulting in a deep blue-purple color. Test results are
measured at 590 nm.
Required Reagents
Quantity Required
Description per test Unit Cat. No.
FerroMo
®
Iron Reagent Set (100 tests)..........................................................................................................25448-00
Includes:
(4) FerroMo
®
Iron Reagent 1 Powder Pillows ...............................1 pillow........... 25/pkg...............25437-68
(2) FerroMo
®
Iron Reagent 2 Powder Pillows ...............................1 pillow........... 50/pkg...............25438-66
Required Apparatus
Cylinder, graduated mixing, 50-mL, w/stopper .................................1....................... each......................1896-41
Sample Cells, 10-20-25 mL, w/cap.........................................................2....................... 6/pkg.................24019-06
Required Standards
Iron Standard Solution, 100-mg/L................................................................................... 100 mL...............14175-42
Iron Standard Solution, 10-mL Voluette
®
ampule, 50-mg/L Fe.................................. 16/pkg...............14254-10
Water, deionized ................................................................................................................. 4 liters ....................272-56
Program 95% Confidence Limits of Distribution
275 0.97–1.03 mg/L Fe
Portion of Curve ∆Abs ∆Concentration
Entire range 0.010 0.01 mg/L Fe