While working on my laterite samples, I came across a problem. Following the digestion protocols we made the volume with approx. 100 times dilution and started the ICP-MS measurements. The concentrations went down after measurement of 2-3 samples. The reason was a clogged pore. Citing the presence of trace and REEs in very low concentrations we can't go for further dilution so is there any way to remove Fe from the matrix without disturbing other elements?
One method is there adressing similar problem I am sharing here by Liu et al. (2020)
Try a concentrated sodium hydroxide digestion. then pass over zeolite, or liquid liquid in ether.
William Bray
Sir can you send me a detailed procedure or if any research article is there
Its sodium hydroxide saturated into ethanol, takes a few days to dissolve: ethanolic sodium hydroxide. ESH
drop your sample into a 500ml beaker of the ESH and heat to 80c stir plate for three hours. filter of the ESH.
disolve in ether and cold stir for one hour.
ready for ICPMS.
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