In
analytical chemistry,
ashing is the process of
mineralization for preconcentration of trace substances prior to chemical analysis.
[1] Ash is the name given to all non-
aqueous residue that remains after a sample is
burned, and consist mostly of metal
oxides.
Ash is one of the components in the
proximate analysis of biological materials, consisting mainly of salty,
inorganic constituents. It includes metal
salts which are important for processes requiring
ions such as Na
+ (Sodium), K
+ (Potassium), Ca
2+ (Calcium). It also includes trace
minerals which are required for unique molecules, such as
chlorophyll and
hemoglobin.
Example
For instance, the analysis of
honey shows:
[2]- Typical honey analysis
In this example the ash would include all the
minerals in honey.
See also- oxides, e.g. Al2O3, CaO, Fe2O3, MgO, MnO, P2O5, K2O, SiO2
- carbonates: Na2CO3 (aka soda ash), K2CO3 (aka potash),
- bicarbonates, e.g. NaHCO3 (aka baking soda),
References
- ^IUPAC, Compendium of Chemical Terminology, 2nd ed. (the "Gold Book") (1997). Online corrected version: (2006–) "ashing".
- ^Sugar Alliance
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