Fluoride
Fluoride
Page 2 of 4
Fluoride_UniCell_Other_SPA_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.
Sample Collection, Preservation, and Storage
Collect samples in acid-cleaned glass or plastic containers. Store the samples
at 4 °C (39 °F) or less, for up to 28 days.
Accuracy Check
Standard Additions Method (Sample Spike)
1. After reading test results, leave the sample cell (unspiked sample) in the
instrument.
2. Touch
Options. Touch Standard Additions. A summary of the standard
additions procedure will appear.
5. Cap the sample vial
and invert several times
to mix.
6. Touch the timer icon.
Touch
OK.
A 1-minute reaction
period will begin.
7. When the timer
beeps, wipe the sample
vial and place it into the
celladapter.
8. Touch Read.
Results will appear in
mg/L F
–
.
Read
Interfering Substance Interference Levels
Cl
–
7000 mg/L
SO
4
2–
200 mg/L
Mn
2+
30 mg/L
PO
4
3–
16 mg/L
Fe
2+
, Fe
3+
10 mg/L
Cl
2
3 mg/L
Sodium metaphosphate 1 mg/L
Al
3+
0.1 mg/L
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