Surgery – Diagnostic testing – Liquid collection
Patent
1998-07-29
2000-05-16
Hindenburg, Max
Surgery
Diagnostic testing
Liquid collection
A61B 500
Patent
active
060630418
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD AND PRIOR ART
The present invention concerns a device for collecting volatile products deposited on a surface in static mode, as well as a kit or package comprising such a collecting device and a support for the sampling of the headspace volatiles emitted by a perfuming composition applied onto the skin.
It is known in the perfume industry, that the measurement of the diffusion of volatile compounds from the skin or hair, or also from other types of perfumed surfaces, is essential for assessing the olfactive performance of perfuming compositions, in the form of perfumes, colognes, or in cosmetics such as creams, shampoos, soaps, etc. This measurement can be carried out in vivo in order to study the diffusion profile of said perfuming compositions applied onto different skin types and comprises, in general, two distinct stages, i.e. the collection of the headspace, then the analysis of the volatile compounds captured, each of the stages having its own limits.
With respect to the first stage, the so-called "Headspace" analysis techniques can be used, which are based on the trapping of the compounds of the gaseous phase in the direct environment of the surface zone of the body studied, for example by adsorption on a solid porous material; the thus trapped components are then desorbed, generally thermally, and analyzed by chromatography, spectrometry or any other appropriate method.
Dynamic sampling of volatiles has been considered up until now as being more efficient, since it makes it possible to enrich the adsorbing material in volatile, or even semi-volatile, products. Equipments intended for the dynamic collection of perfume headspace are described, for example, by Vuilleumier et al. in Perfumer & Flavorist, vol. 20, p. 1-9, March/April 1995, and by Baydar et al., in the same journal, vol. 20, p. 45-53, September/October. 1995.
However, the apparatuses described in the above publications have the disadvantage of requiring the use of a calibrated pump, in order to precisely know the gaseous volume pumped in the course of the capturing process, and the presence of a filter, for example an activated charcoal-based filter, to avoid the contamination of the air circulating inside the system. Moreover, these equipments are bulky, as they require, for example, that a hermetically sealed sleeve is applied around a body member (for example, an arm), as well as operation by a specialist, and that they are not easy to transport and cannot be used without an energy source.
The object of the present invention is to overcome the drawbacks of the known headspace analysis devices, by providing a device which is easy to use, even by non-specialists, inexpensive and can be carried, while assuring a reliable and reproducible sampling of the volatile products.
DESCRIPTION OF THE INVENTION
The miniature device for sampling or collecting volatile compounds deposited on a surface which is the object of the present invention is characterized in that it comprises a housing having an open end and defining an internal cavity which runs into the said opening and which contains a material capable of adsorbing said volatile compounds, and in that said opening can be closed by means of a stopper, is closed when in the out-of-use position and is adapted to be in contact with said surface when in the operation position.
More particularly, and according to a possible embodiment of the invention, the housing is formed of two parts which can be fitted into each other, such as to retain in-between the adsorbing material, the latter being retained by a microgrid which is preferably made of an inert material such as for example Teflon.RTM., stainless steel, etc. The collecting device further comprises a third part which forms, in the out-of-use-position, a stopper which hermetically seals the opening of said housing. Preferably, the three parts which form the device are of cylindrical shape and made of a hard and essentially inert plastic material, for example polycarbonate, polypropylene, Teflon.RTM., etc.
According to a v
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C. Vuilleumier et al., "Headspace Measurement of Evaporation Rates of Perfumes Applied onto Skin: Application to Rose Essential Oils and Their Principal Components", Perfumer & Flavorist, vol. 20, pp. 1-9 (Mar./Apr. 1995).
A. Baydar et al., "Skin Odor Value Technology for Fragrance Performance Optimization", Perfumer & Flavorist, vol. 20, pp. 45-53 (Sep./Oct. 1995).
Aymard Laurence
Flament Ivon
Vuilleumier Christine
Firmenich SA
Hindenburg Max
Wingood Pamela
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