Determining EDTA Concentration in PPM in Aquaous Solution

[shadownitro]

how can i determine the concentration of EDTA in PPM in an aquaous solution ?
thanks

 

[chemisttree]

Try Googling the phrase "EDTA determination in Solution". Many techniques will be listed for the determination of EDTA by titration, spectrography, capillary electrophoresis, etc...

Choose the technique commensurate with the equipment you have available.

good luck!

 

[ravenprp]

To determine the concentration of EDTA in parts per million (PPM) in an aqueous solution, you will need to perform a titration experiment. This involves adding a known amount of EDTA solution to a measured volume of the aqueous solution containing the metal ions to be complexed by EDTA. The EDTA will bind to the metal ions, forming a complex, and the remaining unbound EDTA can then be titrated with a standard solution of a metal ion, such as magnesium or zinc. The endpoint of the titration is reached when all the unbound EDTA has been consumed, and the amount of standard solution used can be used to calculate the concentration of EDTA in the original solution.

Alternatively, if you know the initial concentration of the metal ions in the aqueous solution, you can also use a spectrophotometric method to determine the concentration of EDTA. This involves measuring the absorbance of the solution before and after the addition of EDTA, and using the change in absorbance to calculate the concentration of EDTA present.

It is important to note that the accuracy of these methods depends on the precision of your measurements and the purity of your reagents. It is also recommended to perform multiple trials and take the average of your results to ensure accuracy.