I have some sediment samples and I would like to characterize them by reflectance spectroscopy in the visible and near infrared range. However, there are some factors influencing the sediments spectra, i.e. organic matter, texture, minerals and metals.
How could I solve this problem?
Hi Lidia.
The objective of the study is initially perform a qualitative analysis. We try to identify the presence of heavy metals in sediment samples, but the spectra did not permit such identification. Analyses were performed in two particle size fractions:
Thank you for the suggestions.
Initially I will try to degrade the organic matter of the samples and then compare the results with those previously obtained.
I do not have knowledge about Net Analyte Signal (NAS) or Multivariate Curve Resolution (MCR), but I will look for papers on this subject.
Hello Ismael,
I'm currently working with a portable visible spectrometer (380-730nm) for sediment characterization.
We experienced that water content (and thus organic matter content) may affect to a certain degree the shape,amplitude,slopes of the different spectra.
What about trying to express your data as 1st derivative ?
(Debret et al. 2011.Spectrocolorimetric interpretation of sedimentary dynamics: The new “Q7/4 diagram”-Earth-Science Reviews 109 (2011) 1–19).
This would thus imply not treating your samples which can be of interest !
Sorry for not answering directly to your question.
Thank you for the suggestion Benjamin.
Do you have any publications in this area?
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