Sulfite
© Hach Company, 2003. All rights reserved. Printed in the U.S.A. 3/04 1ed
Page 4 of 4 Sulfite_Other_Eng_Ody.fm
HACH COMPANY
WORLD HEADQUARTERS
Telephone: (970) 669-3050
FAX: (970) 669-2932
FOR TECHNICAL ASSISTANCE, PRICE INFORMATION AND ORDERING:
Call 800-227-4224
Contact the HACH office or distributor serving you.
www.hach.com techhelp@hach.com
In the U.S.A. –
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On the Worldwide Web – ; E-mail –
toll-free
Method Performance
Precision
Standard: 3.00 mg/L SO
3
2–
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 reagents react with sulfite to form a yellow complex. The samples are
measured at 435 nm.
Required Reagents
Quantity Required
Description per test Unit Cat. No.
Sulfite Colorimetric Reagent Set
*
..................................................................................... 100/pkg.............HPT 430
Includes:
Sulfite Reagent A................................................................................1 ....................... 28 mL.............HPT 430 A
Sulfite Reagent B ................................................................................1 ....................... 8.7 mL............ HPT 430 B
Required Apparatus
Sample cells, 10-mL, w/cap....................................................................2 ....................... 6/pkg.................24276-06
Required Standards
Sulfite Standard Solution, 15-mg/L................................................................................. 500 mL...............24084-49
Water, deionized ................................................................................................................. 4 liters ....................272-56
Program 95% Confidence Limits of Distribution
692 2.51–3.49 mg/L SO
3
2–
Program ∆Abs ∆Concentration
692 0.010 0.04 mg/L SO
3
2–
*Available in Europe only
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