Français
4. Data comparability
4.1 Main criticisms of extraction protocols
Extraction protocols are often criticized for their use (e.g. implementation time, non-specificity) and for their multiplicity, which makes it difficult to achieve good data comparability.
As already pointed out in paragraph
2.3
The Ultimate Scientific and Technical Reference
This article is included in
Analysis and Characterization
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Data comparability
Bibliography
References
Appendix 1 Sequential extraction procedure (BCR scheme) for metal fractionation in sediments and soils
1.Instruments and reagents
-
Devices
The laboratory equipment used may be made of borosilicate glass, poly6Fethylene, polypropylene or PTFE, with the exception of the centri6Ffugation tube, which must be made of borosilicate glass or PTFE. Clean vials in contact with samples or...
Appendix 2 Single extraction procedures for metal fractionation in soils
Unique extraction procedures for soil analysis (see paragraph 4.3.3. ) based on EDTA 0.05 mol/L and acetic acid 0.43 mol/L are described below.
Extractions should be performed in borosilicate glass, polyethylene, polypropylene or PTFE bottles, using an inverting shaker. Laboratory equipment should be cleaned with 4 mol/L...
Appendix 3 SMT protocol for the fractionation of phosphorus forms in freshwater sediments
1.Reagents and equipment
The reagents used are HCl 1 mol/L, HCl 3.5 mol/L, NaOH 1 mol/L and NaCl 1 mol/L. The laboratory equipment used can be made of polyethylene or polypropylene, including centrifuge tubes. Stirrers can be magnetic stirrers, stirring tables or inverting stirrers.
All reagents must be at least...
Standardization
Association française de normalisation AFNOR
- Sécurité des jouets - Partie 3 : migration de certains éléments (Indice de classement : S51-214). - NF EN 71-3 - 03-95
- Qualité du sol - Extraction des éléments en traces solubles dans l'eau régale (Indice de classement : X31-415). - NF ISO 11466 - 06-95
The Ultimate Scientific and Technical Reference
