During the extraction of soil/sediment by QuEChERS, when I added the salt in the tube the sediment/soil get transform into crystalline agglomerates (hard lump like structure). Does this agglomeration can sacrifice the percent of recovery? QuEChERS suppliers have prescribed the use of ceramic pieces to break up salt agglomerates to facilitate sample homogenization. However, Bragança et al. reported that the use of ceramic pieces made no significant difference. Can someone suggest me any way to avoid the formation of agglomerates.
Yes it can. You should determine the recovery of each analyte, for calibration you should use the internal standard method.
Think about ultrasound assisted extraction.
regards,
G
Hi, Vineet,
In chemistry this is called "interferings". And the interfering must be previously removed or transformed to something that no longer interferes in the desired analysis.
Depending on the salt you mix and on the agglomerate that is being formed you may have different procedures to eliminate the interfering.
Try the link below. It may have a solution for your case.
https://www.degruyter.com/downloadpdf/j/sampre.2013.1.issue/sampre-2013-0006/sampre-2013-0006.pdf
Thank you for your comment Jorge Costa-de-Moura, but I already read this paper and tried everything that is mentioned in the paper. Nothing work. I tried ceramic pieces to break up salt agglomerates, also tried the addition of QuEChERS content slowly and continuously with slow vortexing. but again ....Nothing works. I faced the problem of formation of agglomerates also in homogenized plant and fruit samples too.
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