Hach DR2400 - Page 372

Manganese
© Hach Company, 2003. All rights reserved. Printed in the U.S.A. 3/04 1ed
Page 4 of 4 Manganese_PP_Low_PAN_Eng_Ody.fm
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Method Performance
Precision
Standard: 0.500 mg/L Mn
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 PAN method is a highly sensitive and rapid procedure for detecting low
levels of manganese. An ascorbic acid reagent is used initially to reduce all
oxidized forms of manganese to Mn
2+
. An alkaline-cyanide reagent is added to
mask any potential interferences. PAN Indicator is then added to combine with
the Mn
2+
to form an orange-colored complex. Test results are measured at
560 nm.
Required Reagents
Quantity Required
Description per test Unit Cat. No.
Manganese Reagent Set, 10-mL (50 tests) ....................................................................................................26517-00
Includes:
Alkaline Cyanide Reagent ................................................................30 drops.......... 50 mL SCDB .....21223-26
Ascorbic Acid Powder Pillows ........................................................2 pillows......... 100/pkg.............14577-99
PAN Indicator Solution, 0.1%...........................................................42 drops.......... 50 mL SCDB .....21224-26
Water, deionized .......................................................................................10 mL .............. 4 liters....................272-56
Required Apparatus
Sample Cells, 10-20-25 mL, w/cap.........................................................2....................... 6/pkg.................24019-06
OPTIONAL REAGENTS AND STANDARDS
Manganese Standard Solution, 10-mg/L Mn, 2-mL ampule....................................... 20/pkg...............26058-20
Manganese Standard Solution, 250-mg/L Mn, 10-mL Voluette
®
ampule ................. 16/pkg...............14258-10
Program 95% Confidence Limits of Distribution
290 0.492–0.508 mg/L Mn
Portion of Curve ∆Abs ∆Concentration
Entire range 0.010 0.007 mg/L Mn