Copper
Copper
Page 2 of 4
Copper_UniCell_Other_BATH_Eng_Ody.fm
Interferences
The ions listed in the table have been tested up to the given concentrations.
Cumulative effects and the influence of other ions have not been evaluated.
Note: Higher amounts of iron and chromium cause a positive interference.
Sample Collection, Storage and Preservation
Collect samples in acid-cleaned or plastic containers. Acid addition is not
necessary if samples are analyzed immediately. To preserve samples, adjust the
pH to 2 or less with concentrated nitric acid (about 2 mL per liter). Preserved
samples may be stored up to six months at room temperature.
Before analysis, adjust the pH to between 3 and 6 with 5.0 N Sodium Hydroxide
Standard Solution. Do not exceed pH 6 or copper may precipitate.
5. Install the 16-mm cell
adapter.
Note: See Section 2.6 Sample
Cell Adapters in the Instrument
Manual for adapter installation
details.
When the timer beeps,
wipe the zero vial and
place it into the cell holder.
6. Touch Zero.
The display will show:
0.00 mg/L Free Cu
Underrange
Note: If the sample was
pretreated with the Metal Prep
Set (HCT 200), touch Options
and select Tot. Cu.
7. Wipe the sample vial
and place it into the cell
holder.
8. Touch Read.
Results will appear in
mg/L Cu.
Zero Zero
Interfering Substance Interference Levels
Cl
–
,
NO
3
–
,
SO
4
2–
1000 mg/L
Mg
2+
, NH
4+
, Ca
2+
, PO
4
3–
, CO
3
2–
, NO
2–
, K
+
, Na
+
500 mg/L
Zn
2+
, Cd
2+
, Ni
2+
, Pb
2+
50 mg/L
Cr
3+
, Cr
6+
25 mg/L
Fe
2+
, Fe
3+
15 mg/L
Sn
2+
, Hg
2+
5 mg/L
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