Colorimetric determination of phosphate
Heavy metals in excess of 10 mg/l can slightly decrease the colour intensity, vanadium causes an increase in colour. Silica interferes and causes falsely high results. Arsenates react like phosphates. Citrate, oxalate, tartrate etc. reduce the sensitivity of the phosphate test.
(Reaction principle analogous to APHA 4500-P E, EPA 365,2+3, DIN EN ISO 6878-D11)
Data and ordering information
|Cat No.||920 082|
|Type||high sensitive test kit|
|Range||0.0 - 0.05 - 0.10 - 0.15 - 0.20 - 0.3 - 0.4 - 0.6 - 0.8 - 1.0 mg/ lP|
|Sufficient for||300 determinations|
|Shelf life||at least 24 months|
|Sea water suitability||yes|
|Detectable with PF-11||no|
Exact data about the phosphate content are important for boiler water and feed water. Precise dosing of phosphates in these waters can inhibit the formation of boiler scale. Pyro-, meta- and polyphosphates are not determined with VISOCOLOR® test kits. The determination of total phosphate requires a decomposition prior to the test.