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Digestions - Extractions

Digestions - Extractions

An aliquot of the sample (between ~0.5g and ~1g) is weighed and dissolved.

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Crédit photos @A. Marquot

The dissolution process depends on the analyte being studied and the analysis to be performed:

AnalyteAnalysisTreatment

Volatils elements

SpectrometryWet digestion (WD), HNO3 H2O2

Non-volatile elements

SpectrometryDry digestion (DD), HNO3

Al, Cr, Mo

SpectrometryWD or DD + HF recovery

Special case: Fruits

SpectrometrySpecial dry method with ammonium nitrate

Nitrogen/Carbon

DumasNo treatment

Mercury

Cold vapor AASNo treatment
ChlorineXRF

No treatment