Hach DR2400 - Page 746

Sulfate
© Hach Company, 2003. All rights reserved. Printed in the U.S.A. 3/04 1ed
Page 4 of 4 Sulfate_UniCell_Turb_Eng_Ody.fm
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Method Performance
Precision
Standard: 750 mg/L SO
4
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
Sulfate ions in the sample react with barium chloride in aqueous solution and
form a precipitate of barium sulfate. The resulting turbidity is measured
photometrically.
Required Reagents
Description Unit Cat. No.
Sulfate - SO
4
2–
, HR, UniCell™ HCT 126 ......................................................................... 23/pkg.............. HCT 126
Optional Reagents
Sulfate Standard, 2500-mg/L as SO
4
............................................................................... 500 mL...............14252-49
Sulfate Standard, 2500-mg/L as SO
4
, 10-mL Ampules................................................. 16/pkg...............14252-10
Required Apparatus
Adapter, 16-mm Cell .......................................................................................................... each....................59457-00
Optional Apparatus
Cylinder, mixing, graduated 25-mL................................................................................. each....................20886-40
Pipettor, Jencons, 1–5 mL................................................................................................... each....................27951-00
Replacement tips for 27951-00 .......................................................................................... 100/pkg.............27952-00
Pipettor, Jencons, 100–1000 µL.......................................................................................... each....................27949-00
Replacement tips for 27949-00 .......................................................................................... 400/pkg.............27950-00
Program 95% Confidence Limits of Distribution
812 672–828 mg/L SO
4
2–
Program Portion of Curve ∆Abs ∆Concentration
812 Entire range 0.010 5 mg/L SO
4
2–