DR/2400
Cadmium
Cadmium_UniCell_Other_CAD_Eng_Ody.fm Page 1 of 4
• Adjust the pH to between 3–6 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 wet towel, followed by a dry one.
• Use the standard solution or standard addition method to verify results. See Accuracy Check on page 3.
• See Section 3.2.4 in the procedure manual for information on adjusting the calibration curve.
• Make sure that the temperature of the sample and the reagents is between 15–25 °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.
Cadmium
Cadion Method
UniCell™ Vials
(0.02 to 0.30 mg/L Cd)
Scope and Application: For wastewater process control
1. Touch Hach
Programs.
Select program
815 Cadmium, HCT 154.
Touch
Start.
2. Pipet 10.0 mL of
sample into the reaction
tube (red cap).
3. Pipet 1.0 mL of
Complexing Solution A
(HCT 154 A) into the
reaction tube.
4. Close the reaction
tube and invert several
times to mix.
Tips and Techniques
UniCell Vials
Hach Programs
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