DR/2400
Nickel
Nickel_UniCell_Other_DIMETH_Eng_Ody.fm Page 1 of 4
• Undissolved or complexed nickel can only be determined after digestion with the Metal Prep Set (HCT 200).
• Adjust pH of preserved samples to between pH 3–8 before analysis.
• The outside of the vial must be clean before placing it in the instrument. Wipe with a damp towel, followed by a dry one.
• For a proof of accuracy, use the standard solution or standard addition method. (See Accuracy Check).
• See the Instrument Procedure Manual for instructions to adjust the calibration curve, if needed.
• The temperature of the water sample and the sample vial should be between 15–25 °C (59–77 °F).
• 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.
Nickel
Dimethylglyoxime Method
UniCell™ Vials
(0.10 to 6.00 mg/L)
Scope and Application: For water, wastewater, raw water, and process control
1. Touch
Hach Programs.
Select program
328 Nickel, HCT 167.
Touch
Start.
2. Pipet 4.0 mL of
sample into a sample
vial.
3. Pipet 0.4 mL of
Dimethylglyoxime
Solution A (HCT 167A)
into the sample vial.
4. Cap and invert the
vial several times to mix.
Tips and Techniques
UniCell Vials
Hach Programs
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