Hach PHOSPHAX sigma Manuel D'utilisation De Base page 140

Cross-sensitivity
The ions listed in the table have been individually checked up to the
concentrations specified. The sum effect and the influence of other ions
was not determined by us. The following do not cause malfunctions:
2––
5000 mg/L SO
4
–
2000 mg/L CI
+ +
1000 mg/L K , Na
2+
250 mg/L Ca
2+
100 mg/L Mg
2–
CO , NO
3
50 mg/L
2+ 2+
Co , Ni
–
500 mg/L NO
3
50 mg/L SiO
2
2+
5 mg/L Hg
2+
5 mg/L Sn
2+
2.5 mg/L Pb
+
2.5 mg/L Ag
3+
1 mg/L Cr
6+
0.5 mg/L Cr
Primary amines are recorded with them and produce excess findings. All
reduction agents disrupt and lead to insufficient findings.
English 140
– 3+ 2+ 2+ 3+
, Fe , Fe , Cd , NH , Al , Zn
2 4
2+
, Mn
2+ 2+
, Cu ,