Measuring phenols in wastewater by titration method involves determining the concentration of phenols using a titrant (a solution of known concentration) that reacts with the phenols in the sample. The endpoint of the titration is reached when all the phenols have reacted with the titrant, and this is indicated by a color change or other observable change in the solution.
Here's a general outline of the titration method to measure phenols in wastewater:
Materials and Reagents:
Titration Procedure:
It's important to note that the specific titration method, choice of indicator, and the type of wastewater being analyzed can influence the accuracy and sensitivity of the measurement.
Analytical techniques commonly used in the determination of phenols are high-performance liquid chromatography and capillary electrophoresis (CE) in combination with ultraviolet detection (UV), electrochemical detection or mass spectrometry detection (MS).
Bromine Water Test:
Phenol is assayed by using excess of standard solution of bromine and then determination of the excess unreacted bromine using potassium iodide & standard solution of sodium thiosulfate (Bromometric method)..
1. Dissolve the given organic compound in glacial acetic acid.
2. Add bromine water solution to this dropwise.
3. If the colour of bromine disappears then it indicates the presence of phenol.
OR
The concentration of phenol may be determined directly from a standard curve which may be prepared, or by calculation from the equation: Phenol, ppm = K log 100-meter reading 100 where K is the calibration constant.
The USPA method is called Method 604 and covers the determination of phenol and certain substituted phenols. The technique involves acidifying and extracting the sample with methylene chloride using a separatory funnel. The extract is then derivatized with diazomethane and analyzed by gas chromatography with flame ionization detection.
Method 604: Phenols (epa.gov)
See attachment.
Thank you dears Gaurav H Tandon Francesco Barbangelo and Prem Baboo for sharing your answers.
Phenol is very toxic in waste water too. Phenol act as carcinogens and cause damage to the red blood cells even at low concentration. its presence must be detected very accurately. detection of such must be very accurately. However volumetric methods are just approximate. it is necessary to go for spectrometer or various other sophisticated techniques which are well described in google.
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