Phosphate test
Classification | Colorimetric method |
---|---|
Analytes | Phosphate |
A range of qualitative and quantitative tests have been developed to detect phosphate ions (PO43-) in solution. Such tests find use in industrial processes, scientific research, and environmental water monitoring.
Quantitative method
A quantitative method to determine the amount of
Qualitative method
A simple qualitative method to determine the presence of phosphate ions in a sample is as follows. A small amount of the sample is acidified with concentrated nitric acid, to which a little ammonium molybdate is added. The presence of phosphate ions is indicated by the formation of a bright yellow precipitate layer of ammonium phosphomolybdate. The appearance of the precipitate can be facilitated by gentle heating. This test is also used to detect arsenic, a yellow precipitate being formed.
See also
References
- ^ Wiley Interscience
- ^ "Qualitative Analysis".
- ^ "Qualitative Analysis of Some Common Ions Class Notes". Archived from the original on 2013-06-26. Retrieved 2013-06-18.