I want to measure the Li+ concentration of a ethanol/isopropanol solution by ICP-OES, does anyone suggest how to do it? because usually analysis are carried out with aqueous solution. thank you
What is your exact matrix and the expected concentration of lithium? ICP-OES sounds like an overkill situation (too high of a temperature), although it can be done. Ordinary flame photometers work very well for lithium. Regardless, one can evaporate all the organic solvent, and quantitatively dissolve the residue in an aqueous acid system. If this is not a case, read about "standard addition method" for constructing a calibration curve. This will eliminate the matrix effect to a large extent. It will be incorrect to use aqueous standards and organic sample.
If the organic solvent kills the plasma Farook has given the solution: replacing the solvent. If not you need Li standards in the solvent mix. Whether you may need ro add a more easily ionised element such as K I'm unsure.
Hello, normally inserting organic solutions into ICP OES can cause problems in plasma stability and damage of carbon encrustation on the torch surface and the injector. You can try to dilute your alcohol sample in an attempt to decrease the amount of carbon present because some of the energy that will be used to atomize your analyte will be used to burn the sample, so you lose some efficiency. I believe that a sample siluation with analysis using calibration by internal standard, since transport problems can occur during nebulization. If it does not work, a sample digestion will solve all problems, but it will lead to a greater cost of time. Good Luck in analysis.
- Badges
- Science method
- Similar topics
- Chemistry
- General Biochemistry
- Biochemical Techniques
- Analytical Chemistry