DR/2400
Aluminum
Aluminum_UniCell_Other_CHR_Eng_Ody.fm Page 1 of 4
• Analyze collected samples in glass or plastic bottles as quickly as possible.
• Adjust pH of preserved samples to between pH 2–3 with 5.0 N Sodium Hydroxide Standard Solution before analysis.
• Clean the outside of the vial before placing it in the instrument. Wipe with a damp towel, followed by a dry one.
• Use the standard solution or standard addition method to verify results. See Accuracy Check.
• See Section 3.2.4 Adjusting the Standard Curve on page 40 in the procedure manual for information on adjusting the calibration
curve.
• Make sure that the temperature of the water sample and the sample vial is between 18–22 °C
• Underrange appears on the display when the instrument is zeroed or when the determined sample concentration is below the
operating range listed for this method.
Aluminum
Chromazurol S Method
UniCell™ Vials
(0.02 to 0.50 mg/L Al
3+
)
Scope and Application: For drinking water, swimming pool water, wastewater, and process control
1. Touch
Hach Programs.
Select program
12 Aluminum, HCT 150
Touch Start.
2. Pipet 2 mL of Buffer
Solution A (HCT 150 A)
into a sample vial.
3. Pipet 3 mL of sample
into the sample vial.
4. Use the spoon to add
one level spoonful of
Masking Agent B
(HCT 150 B) to the
sample vial.
Tips and Techniques
UniCell Vials
Hach Programs
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