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Papers by Evelyne CHANSON
Revue des oenologues et des techniques vitivinicoles et oenologicques: magazine trimestriel d'information professionnelle, 1999
OENO One, Jun 30, 2005
Cet article présente des résultats de fidélité du dosage des chlorophénols et des chloroansioles ... more Cet article présente des résultats de fidélité du dosage des chlorophénols et des chloroansioles dans les bois de chêne de tonnellerie. Les méthodes d'analyse employées sont celles développées et validées en interne par les quatre laboratoires participants. Des matériaux spécifiques ont été réalisés par ajout puis par dilution sur du bois afin de disposer d'un matériel homogène et de concentration connue. Le coefficient de variation de l'écart type de reproductibilité mesuré est de l'ordre de 25 % pour le TCP et le PCP, de 45 % pour le TeCP, le TCA et le TeCA et de 50 % pour le PCA. Summary : This work was the first step of a study initiated by the FFT (Fédération Française de la Tonnellerie) to review the different aspects of the oak wood contamination, and especially contamination by chlorophenols and chloroanisoles. This paper deals with the precision of chlorophenols and chloroanisoles measurement in cooperage oak woods. The analytical methods used were those developed and single validated by the 4 laboratories that did this work. Material was obtained by adding substances to sawdust and making dilution between supplemented sawdust and blank one. Thus, material was homogenous and has a theoretic level. Recovery values for chlorophenols were between 70 % and 80 %, except one, for the lowest PCP's level (theoretic 7.5 ng/g), which was 95 %. For chloroanisoles, recovery values varied from 50 % for the highest levels to more than 100 % for the lowest levels. Measured reproducibility, expressed in variation coefficient of the standard deviation, was about 25 % for TCP and PCP, 45 % for TeCP, TCA and TeCA and more than 50 % for PCA. For TCP, PCP, TCA and TeCA, despite the use of different methods, these values are of the same order as those given by the Horwitz formula. These values may help to compare results and to build a decision rule of the conformity of the oak wood. The heterogeneousness of the material is another source of the final result variability. This last source was not quantified in this work.
OENO One, 2005
This work was the first step of a study initiated by the FFT (Fédération Française de la Tonnelle... more This work was the first step of a study initiated by the FFT (Fédération Française de la Tonnellerie) to review the different aspects of the oak wood contamination, and especially contamination by chlorophenols and chloroanisoles. This paper deals with the precision of chlorophenols and chloroanisoles measurement in cooperage oak woods. The analytical methods used were those developed and single validated by the 4 laboratories that did this work. Material was obtained by adding substances to sawdust and making dilution between supplemented sawdust and blank one. Thus, material was homogenous and has a theoretic level. Recovery values for chlorophenols were between 70 % and 80 %, except one, for the lowest PCP's level (theoretic 7.5 ng/g), which was 95 %. For chloroanisoles, recovery values varied from 50 % for the highest levels to more than 100 % for the lowest levels. Measured reproducibility, expressed in variation coefficient of the standard deviation, was about 25 % for TCP...
Tetrahedron Letters, 1985
Organometallics, Jun 1, 1986
ChemInform, Jun 2, 1987
Les oxydes d'amines tertiaires sont reduits en amines par l'hexabutyldistannane, tandis q... more Les oxydes d'amines tertiaires sont reduits en amines par l'hexabutyldistannane, tandis que les N-oxydes de pyridines reagissent avec le dichloro-1,2 tetrabutyl distannane pour donner les pyridines correspondantes
Synthesis, 1987
Les oxydes d'amines tertiaires sont reduits en amines par l'hexabutyldistannane, tandis q... more Les oxydes d'amines tertiaires sont reduits en amines par l'hexabutyldistannane, tandis que les N-oxydes de pyridines reagissent avec le dichloro-1,2 tetrabutyl distannane pour donner les pyridines correspondantes
Tetrahedron Letters, 1985
Unsymmetrical a-diketones have been obtained via cross coupling of acyltins with acyl halides und... more Unsymmetrical a-diketones have been obtained via cross coupling of acyltins with acyl halides under PdC12(PPhJ)2 catalysis while symmetrical u-diketones have been readily obtained via "in situ" formation of acyltins using hexabutylditin and acyl chlorides under similar experimental conditions.
Synthesis, 1987
Les oxydes d'amines tertiaires sont reduits en amines par l'hexabutyldistannane, tandis q... more Les oxydes d'amines tertiaires sont reduits en amines par l'hexabutyldistannane, tandis que les N-oxydes de pyridines reagissent avec le dichloro-1,2 tetrabutyl distannane pour donner les pyridines correspondantes
Journal of Organometallic Chemistry, 1985
Revue des oenologues et des techniques vitivinicoles et oenologicques: magazine trimestriel d'information professionnelle, 1999
OENO One, Jun 30, 2005
Cet article présente des résultats de fidélité du dosage des chlorophénols et des chloroansioles ... more Cet article présente des résultats de fidélité du dosage des chlorophénols et des chloroansioles dans les bois de chêne de tonnellerie. Les méthodes d'analyse employées sont celles développées et validées en interne par les quatre laboratoires participants. Des matériaux spécifiques ont été réalisés par ajout puis par dilution sur du bois afin de disposer d'un matériel homogène et de concentration connue. Le coefficient de variation de l'écart type de reproductibilité mesuré est de l'ordre de 25 % pour le TCP et le PCP, de 45 % pour le TeCP, le TCA et le TeCA et de 50 % pour le PCA. Summary : This work was the first step of a study initiated by the FFT (Fédération Française de la Tonnellerie) to review the different aspects of the oak wood contamination, and especially contamination by chlorophenols and chloroanisoles. This paper deals with the precision of chlorophenols and chloroanisoles measurement in cooperage oak woods. The analytical methods used were those developed and single validated by the 4 laboratories that did this work. Material was obtained by adding substances to sawdust and making dilution between supplemented sawdust and blank one. Thus, material was homogenous and has a theoretic level. Recovery values for chlorophenols were between 70 % and 80 %, except one, for the lowest PCP's level (theoretic 7.5 ng/g), which was 95 %. For chloroanisoles, recovery values varied from 50 % for the highest levels to more than 100 % for the lowest levels. Measured reproducibility, expressed in variation coefficient of the standard deviation, was about 25 % for TCP and PCP, 45 % for TeCP, TCA and TeCA and more than 50 % for PCA. For TCP, PCP, TCA and TeCA, despite the use of different methods, these values are of the same order as those given by the Horwitz formula. These values may help to compare results and to build a decision rule of the conformity of the oak wood. The heterogeneousness of the material is another source of the final result variability. This last source was not quantified in this work.
OENO One, 2005
This work was the first step of a study initiated by the FFT (Fédération Française de la Tonnelle... more This work was the first step of a study initiated by the FFT (Fédération Française de la Tonnellerie) to review the different aspects of the oak wood contamination, and especially contamination by chlorophenols and chloroanisoles. This paper deals with the precision of chlorophenols and chloroanisoles measurement in cooperage oak woods. The analytical methods used were those developed and single validated by the 4 laboratories that did this work. Material was obtained by adding substances to sawdust and making dilution between supplemented sawdust and blank one. Thus, material was homogenous and has a theoretic level. Recovery values for chlorophenols were between 70 % and 80 %, except one, for the lowest PCP's level (theoretic 7.5 ng/g), which was 95 %. For chloroanisoles, recovery values varied from 50 % for the highest levels to more than 100 % for the lowest levels. Measured reproducibility, expressed in variation coefficient of the standard deviation, was about 25 % for TCP...
Tetrahedron Letters, 1985
Organometallics, Jun 1, 1986
ChemInform, Jun 2, 1987
Les oxydes d'amines tertiaires sont reduits en amines par l'hexabutyldistannane, tandis q... more Les oxydes d'amines tertiaires sont reduits en amines par l'hexabutyldistannane, tandis que les N-oxydes de pyridines reagissent avec le dichloro-1,2 tetrabutyl distannane pour donner les pyridines correspondantes
Synthesis, 1987
Les oxydes d'amines tertiaires sont reduits en amines par l'hexabutyldistannane, tandis q... more Les oxydes d'amines tertiaires sont reduits en amines par l'hexabutyldistannane, tandis que les N-oxydes de pyridines reagissent avec le dichloro-1,2 tetrabutyl distannane pour donner les pyridines correspondantes
Tetrahedron Letters, 1985
Unsymmetrical a-diketones have been obtained via cross coupling of acyltins with acyl halides und... more Unsymmetrical a-diketones have been obtained via cross coupling of acyltins with acyl halides under PdC12(PPhJ)2 catalysis while symmetrical u-diketones have been readily obtained via "in situ" formation of acyltins using hexabutylditin and acyl chlorides under similar experimental conditions.
Synthesis, 1987
Les oxydes d'amines tertiaires sont reduits en amines par l'hexabutyldistannane, tandis q... more Les oxydes d'amines tertiaires sont reduits en amines par l'hexabutyldistannane, tandis que les N-oxydes de pyridines reagissent avec le dichloro-1,2 tetrabutyl distannane pour donner les pyridines correspondantes
Journal of Organometallic Chemistry, 1985