"Best" will depend on three things, possibly more:
1. The nature of the analytes you are looking for, essentially their properties will dicatate the most appropriate method.
2. Your downstream analysis or process - what form and format you are looking for, some methods render the sample post concentration almost unrecoverable except by diluation with large ammounts of solvent ...
3. The number of samples you have , and the number you need to process in a given time. For 1 sample, a simple system probably works just fine, for 100 ...
Sample preparation is a chain ... break a link, or use a bad link, it will likely affect your results.
What amount of n-hexane did you use? If the amount is small and your analyte isn't to volatile put your extract in the fume hood over night. It will evaporate nicely.
To test what can be lost with this method use HS-SPME technique and check it
Hello,
there is no mention about the target analytes . Recoveries of volatile analytes ( I assume you intend to perform quantitative analysis), e.g. naphtalene, will be affected by the evaporation process.
If you really intend to analyze volatile analytes and your budget permits, I recommend using isotopicaly labelled internal standards.
hope it helps a bit,
kind regards,
Tomas
If you are looking for something like gasoline or fuel oil residues, they will be lost or at least, changed, by evaporating the hexane away. Use the hexane extract as is for GC for volatile contaminants.
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