Hach DR2400 - Page 88

Aluminum
© Hach Company, 2003. All rights reserved. Printed in the U.S.A. 3/04 1ed
Page 4 of 4 Aluminum_UniCell_Other_CHR_Eng_Ody.fm
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2. To adjust the calibration curve using the reading obtained with the 0.30-mg/L
standard solution, touch
Options on the current program menu. Touch
Standard Adjust.
3. Touch
On. Touch Adjust to accept the displayed concentration (the value
depends on the selected chemical form). If an alternate concentration is used,
touch the number in the box to enter the actual concentration, then touch
OK.
Touch
Adjust.
Method Performance
Precision
Standard: 0.30 mg/L Al
3+
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
Chromazurol S forms a green complex with aluminum in a slightly acidic
acetate buffer. Measurements are taken at 620 nm.
Required Reagents
Description Unit Cat. No.
Aluminum - Al, UniCell™ HCT 150................................................................................ 23/pkg.............. HCT 150
Required Apparatus
Adapter, 16-mm Cell .......................................................................................................... each....................59457-00
Optional Apparatus
Flask, volumetric, 100-mL ................................................................................................. each....................14574-42
Graduated cylinder, mixing, 250-mL............................................................................... each....................20886-46
Pipettor, (Jencons) 1–5 mL................................................................................................. each....................27951-00
Replacement tips for 27951-00 .......................................................................................... pk/100...............27952-00
Pipettor, (Jencons) 100–1000 µL........................................................................................ each....................27949-00
Replacement tips for 27949-00 .......................................................................................... pk/400...............27950-00
pH Paper.............................................................................................................................. pk/100...............26013-00
Optional Reagents
Aluminum Standard Solution, 100-mg/L Al ................................................................. 100 mL...............14174-42
Nitric Acid, concentrated .................................................................................................. 500 mL...................152-49
Sodium Hydroxide Standard Solution, 5.0 N................................................................. 1000 mL...............2450-53
Program 95% Confidence Limits of Distribution
12 0.25–0.35 mg/L Al
3+
Program Portion of Curve ∆Abs ∆Concentration
12 Entire range 0.010 0.007 mg/L Al
3+