DR/2400
Zinc
Zinc_UniCell_Other_PAR_Eng_Ody.fm Page 1 of 4
• Samples collected in glass or plastic bottles should be analyzed as quickly as possible.
• Adjust pH of preserved samples to between pH 3–5 with 1.0 N Sulfuric Acid 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, to remove
fingerprints and other marks.
• Use the standard solution or standard addition method to verify results. See Accuracy Check.
• See Section 3.2.4 in the procedure manual for information on adjusting the calibration curve.
• The shelf life of test reagents can be extended to 24 months if kept at 4 °C (40 ° F).
• Make sure that the temperature of the water sample and the sample vial is between 15–25 °C (59–77 °F)
• Undissolved zinc and complexed zinc can only be determined after digestion using the Metal Prep Set (HCT 200). Total zinc
measuring range is 0.12 –7.20 mg/L.
• 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.
Zinc
PAR
UniCell™ Vials
(0.10 to 6.00 mg/L Zn*)
* Reagent sets for this method are only available in Europe.
Scope and Application: For waste water, drinking water, surface water, raw water, and process control
1. Touch
Hach Programs.
Select program
809 Zinc, HCT 170
Touch Start.
2. Pipet 4 mL of sample
into a sample vial.
3. Pipet 0.4 mL of
Demasking Solution A
(HCT 170 A) into the
sample vial.
4. Immediately cap
with an orange
UniCap 170 B.
Tips and Techniques
UniCell Vials
Hach Programs
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