Yes I have also thought of this but I also thought maybe there are other possibly more accurate methods using some analytical instruments that can quantify the P or PO4 in a solid.Ygggdrasil said:Can you dissolve the phosphate? There are some nice colorimetric assays for measuring the concentration of phosphate in solution: for example, http://www.sciencedirect.com/science/article/pii/0076687966080145
The most common method for quantifying P or PO4 in an unknown solid is by using a spectrophotometric technique, such as inductively coupled plasma optical emission spectroscopy (ICP-OES) or inductively coupled plasma mass spectrometry (ICP-MS). These methods provide highly accurate and sensitive results.
Yes, proper sample preparation is crucial for accurate quantification of P or PO4 in an unknown solid. This includes thorough homogenization and digestion of the sample to ensure that all of the P or PO4 is in a soluble form for analysis.
Portable analyzers, such as X-ray fluorescence (XRF) or handheld spectrometers, can provide a quick estimation of P or PO4 content in a solid sample. However, these methods are not as accurate as laboratory-based techniques and may require calibration with known standards.
The detection limit for quantifying P or PO4 in an unknown solid varies depending on the analytical method used. Generally, laboratory-based techniques such as ICP-OES or ICP-MS have lower detection limits compared to portable analyzers, with a range of 0.01-0.1 parts per million (ppm).
Yes, most analytical methods for quantifying P can also measure PO4. However, it is important to note that some methods may only detect either P or PO4, so it is necessary to ensure that the chosen method can measure both analytes for accurate quantification.