Nickel; Dimethylglyoxime Method; Unicell™ Vials - Hach DR2400 Manual

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Table of Contents

UniCell™ Vials

Scope and Application:

Tips and Techniques

• 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.

UniCell Vials

Hach Programs

Hach Programs

Select program

328 Nickel, HCT 167

Nickel_UniCell_Other_DIMETH_Eng_Ody.fm

For water, wastewater, raw water, and process control

Pipet 4.0 mL of

sample into a sample

Pipet 0.4 mL of

Dimethylglyoxime

Solution A (HCT 167A)

into the sample vial.

Nickel

(0.10 to 6.00 mg/L)

Cap and invert the

vial several times to mix.