Phosphorus, Total
Phosphorus, Total
PhosphorusTot_UniCell_APD_Eng_Ody.fm Page 3 of 6
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.
Sample Collection, Storage, and Preservation
Analyze samples within 3 hours after collection for best results. Store in a cool
dry place in plastic or glass bottles that have been acid cleaned with 1:1
Hydrochloric Acid Solution and rinsed with deionized water. Do not use
commercial detergents containing phosphate for cleaning glassware used in
this test.
13. Touch Zero.
The display will show:
0.0 mg/L PO
4
3–
Underrange
14. Place the prepared
sample vial into the cell
adapter.
15. Touch Read.
Results will appear in
mg/L PO
4
3–
.
Zero
Read
Interfering Substance No interference up to:
SO
4
2–
20 g/L
Cl
–
10 g/L
K
+
, Na
+
4 g/L
Ca
2+
1 g/L
Mg
2+
400 mg/L
Co
2+
, Fe
2+
, Fe
3+
, Zn
2+
, Cu
2+
, Ni
2+
, NO
2
–
,
Cd
2+
, NH
4
+
, Mn
2+
, Al
3+
, CO
3
2–
200 mg/L
I
–
100 mg/L
SiO
2
50 mg/L
Hg
2+
40 mg/L
Sn
2+
25 mg/L
Pb
2+
20 mg/L
Ag
+
,
Cr
3+
10 mg/L
Cr
6+
1 mg/L
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