Hach DR2400 - Page 116

Boron
© Hach Company, 2003. All rights reserved. Printed in the U.S.A. 3/04 1ed
Page 4 of 4 Boron_PP_Other_CAR_Eng_Ody.fm
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Method Performance
Precision
Standard: 10.0 mg/L B
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
Boron is determined by its reaction with carminic acid in the presence of sulfuric
acid to produce a reddish to bluish color. The amount of color is directly
proportional to the boron concentration. Test results are measured at 605 nm.
Required Reagents
Quantity Required
Description Per Test Unit Cat. No.
BoroVer
®
3 Boron Reagent Powder Pillows .........................................1 pillow........... 100/pkg.............14170-99
Sulfuric Acid, ACS, concentrated...........................................................75 mL .............. 2.5 liters .................979-09
Water, deionized .......................................................................................2.0 mL ............. 4 liters....................272-56
Required Apparatus
Cylinder, graduated, 50-mL ....................................................................1 ....................... each........................508-41
Cylinder, graduated, 100-mL ..................................................................1 ....................... each........................508-42
Flask, Erlenmeyer, 125-mL ......................................................................2 ....................... each........................505-43
Flask, Erlenmeyer, 250-mL ......................................................................1 ....................... each........................505-46
Pipet, volumetric, 2.0-mL ........................................................................2 ....................... each....................14515-36
Sample cells, 10-20-25 mL, w/cap..........................................................2....................... 6/pkg.................24019-06
Required Standards
Boron Standard Solution, 10-mL Voluette
®
Ampule, 250-mg/L B ............................. 16/pkg...............14249-10
Program 95% Confidence Limits of Distribution
40 9.5–10.5 mg/L B
Portion of Curve ∆Abs ∆Concentration
0.010 mg/L 0.010 0.14 mg/L B
6 mg/L 0.010 0.15 mg/L B
13 mg/L 0.010 0.17 mg/L B