Aluminum
Aluminum
Aluminum_PP_Other_ALN_Eng_Ody.fm Page 5 of 6
Standard Solution Method
1. Prepare a 0.4-mg/L aluminum standard solution as follows: Pipet 1.00 mL of
Aluminum Standard Solution, 100-mg/L as Al
3+
, into a 250-mL volumetric
flask.
2. Dilute to the mark with deionized water. Prepare this solution daily. Perform
the aluminum procedure as described above. Go to step 2.
or
1. Using the TenSette Pipet, add 0.8 mL of solution from an Aluminum Voluette
Ampule Standard Solution (50-mg/L as Al) into a 100-mL volumetric flask.
2. Dilute to volume with deionized water. Perform the aluminum procedure as
described.
3. To adjust the calibration curve using the reading obtained with the 0.4-mg/L
aluminum standard solution, touch
Options on the current program menu.
Touch
Standard Adjust.
4. 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.
See Section 3.2.4 Adjusting the Standard Curve on page 40 for more information.
Method Performance
Precision
Standard: 0.40 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
Aluminon indicator combines with aluminum in the sample to form a red-
orange color. The intensity of color is proportional to the aluminum
concentration. Ascorbic acid is added to remove iron interference. The AluVer 3
Aluminum Reagent, packaged in powder form, shows exceptional stability and
is applicable for fresh water applications. Test results are measured at 522 nm.
Program 95% Confidence Limits of Distribution
10 0.383–0.417 mg/L Al
3+
Portion of Curve ∆Abs ∆Concentration
Entire range 0.010 0.008 mg/L Al
3+
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