Animal bones wastes for coiled solid phase microextraction

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The use of natural products, or wastes from them, to fabricate sorptive phases is an interesting research line with green connotations. Ramzi and Farrokhzadeh have evaluated, in a recent article accepted for publication in Journal of Separations Science, the potential use of animal bone wastes in this context. From the chemical point of view, bones are inorganic/organic composite materials where the inorganic part is mainly composed by carbonated hydroxyapatite while collagen fibers comprise the main part, up to 90 %, of the organic material.

"Electronic micrograph 10000 magnification of mineralized collagen fibers in bone" by Bertazzo S used under CC BY. Via wikipedia
The proposed procedure for the fabrication of the coating is simple. Bone wastes are firstly grounded, cleaned and dried. The resulting solid is dispersed in a citric acid solution and heated for a defined period o time. Finally, the solid phase microextraction (SPME) support is immersed into the solution. The evaporation of the solvent leaves a fibrous inorganic/organic coating over the surface than can be used for extraction purposes. The authors have proposed a coiled wire as support as it presents an enhanced superficial area compared with classical SPME fibers.

The resulting material has been applied for the determination of polycyclic aromatic hydrocarbons in water with good results (limits of detection in the ng per liter range). We recommend you the reading of the original manuscript for further details.

 The editor.

Reference

(1) Introduction of a coiled solid-phase microextraction fiber based on a coating of animal bone waste for chromatographic analysis. Link to the article

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