Hach DR2400 - Page 758

Surfactants, Anionic (Detergents)
© Hach Company, 2003. All rights reserved. Printed in the U.S.A. 3/04 1ed
Page 4 of 4 Detergents_None_Other_CVI_Eng_Ody.fm
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Method Performance
Precision
Standard: 0.180 mg/L LAS
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
Detergents, ABS (alkyl benzene sulfonate), or LAS (linear alkylate sulfonate) are
determined by association with crystal violet dye and extraction of the ion-pair
complex into benzene. Test results are measured at 605 nm.
Required Reagents
Quantity Required
Description per test Unit Cat. No.
Detergents Reagent Set ...................................................................................................................................24468-00
Includes:
(1) Benzene, ACS................................................................................55 mL .............. 4 liters ................14440-17
(2) Buffer Solution, sulfate-type.......................................................10 mL .............. 500 mL...................452-49
(3) Detergent Reagent Powder Pillows...........................................1 pillow........... 25/pkg.................1008-68
Required Apparatus
Clippers, for opening powder pillows ..................................................1 ....................... each........................968-00
Cylinder, graduated, 25-mL ....................................................................1 ....................... each........................508-40
Cylinder, graduated, 50-mL ....................................................................1 ....................... each........................508-41
Cylinder, graduated, 500-mL ..................................................................1 ....................... each........................508-49
Funnel, separatory, 500-mL.....................................................................1 ....................... each........................520-49
Sample Cells, 10-20-25 mL, w/cap.........................................................2....................... 6/pkg.................24019-06
Support Ring, 4-inch ................................................................................1 ....................... each........................580-01
Support, Ring Stand, 5 x 8 inch base......................................................1 ....................... each........................563-00
Required Standards
Detergent Standard Solution, 10-mL Voluette
®
Ampule, 60-mg/L LAS................... 16/pkg...............14271-10
Program 95% Confidence Limits of Distribution
9 0.177–0.183 mg/L LAS
Portion of Curve ∆Abs ∆Concentration
Entire range 0.010 0.002 mg/L LAS