Hach DR2400 - Page 658

Phosphorus, Reactive (Orthophosphate)
Phosphorus, Reactive (Orthophosphate)
Page 2 of 4
PhosphorusReac_UniCell_Other_Asc_Eng_Ody.fm
Interferences
The ions listed in the following table have been individually tested up to the
given concentrations. Cumulative effects and the influence of other ions have
not been evaluated.
5. Invert the sample vial
repeatedly until the solid
reagent in the cap is
dissolved.
6. Touch the timer icon
Touch
OK.
A 10-minute reaction
period will begin.
7. Wipe the outside of
the zero (white cap) and
sample vials with a damp
towel followed by a dry
one to remove
fingerprints or other
marks.
8. Install the 16-mm cell
adapter.
Note: See Section 2.6 Sample
Cell Adapters in the Instrument
Manual for adapter installation
details.
Place the zero vial into the
cell adapter.
9. Touch Zero.
The display will show:
0.0 mg/L PO
4
3–
Underrange
10. When the timer
beeps, place the sample
vial into the cell adapter.
11. Touch Read.
Results will appear in
mg/L PO
4
3–
.
HRS MIN SECHRS MIN SEC
Zero
Read
Interfering Substance No interference up to:
SO
4
2–
5000 mg/L
Cl
–
2000 mg/L
K
+
, Na
+
, Ca
2+
1000 mg/L
Mg
2+
, NO
3
–
500 mg/L
Co
2+
, Fe
2+
, Fe
3+
, Zn
2+
, Cu
2+
, Ni
2+
, Cr
3+
, I
–
,
NO
2
–
, Cd
2+
, Sn
2+
, NH
4
+
, Mn
2+
, Al
3+
, Hg
2+
,
Pb
2+
, SiO
2
50 mg/L
Ag
+
25 mg/L
Cr
6+
5 mg/L