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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 solu