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Determination of volatile aldehyde and ketone in leather shoes with static absorption and high performance liquid chromatography / Dai Hong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 4 (07-08/2017)
[article]
Titre : Determination of volatile aldehyde and ketone in leather shoes with static absorption and high performance liquid chromatography Type de document : texte imprimé Auteurs : Dai Hong, Auteur ; Wu Jie, Auteur ; Jia Wenrui, Auteur ; Chen Lei, Auteur ; Zhang Zongcai, Auteur Année de publication : 2017 Article en page(s) : p. 179-182 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorption
AldéhydesUn aldéhyde est un composé organique, faisant partie de la famille des composés carbonylés, dont l'un des atomes de carbone primaire (relié au plus à 1 atome de carbone) de la chaîne carbonée porte un groupement carbonyle.
L'aldéhyde le plus simple est le formaldéhyde (ou méthanal), aussi appelé formol lorsqu'il est en solution aqueuse.
Un aldéhyde dérive formellement d'un alcool primaire (oxydation) dont le groupement hydroxyde -OH est en bout de chaîne et se forme suite à l'enlèvement de deux atomes H d'où le nom "alcool déshydrogéné" ou aldéhyde.
Cétones
Chaussures
Chromatographie en phase liquide à hautes performances
Composés organiques volatils
Cuirs et peaux -- AnalyseIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this paper, volatile low molecular weight aldehydes and ketones in samples of leather shoes were collected by static absorption with water, analyzed and detected by 2,4dinitrophenylhydrazine pre-column derivatization of high performance liquid chromatography (HPLC). Firstly, the sampling temperature and lime of the volatile aldehyde and ketone in leather shoes were optimized and then the volatile aldehyde and ketone in absorption liquid were determined. The experiment result shows that the optimal temperature is 45°C, the sampling time is 24 hours. The collected sample was derivatized by purified sulfuric acid acidulated 2,4dinitrophenylhydrazine. The volatile aldehydes and ketones in absorption liquid of leather shoes were formaldehyde, acetaldehyde, acetone propionaldehyde, butyraldehyde, benzaIdehycle, cyclohexanone and hexanal the average concentrations of which are : 0.252mg/shoe, 0.061mg/shoe, 0.079mg/shoe, 0.053mg/shoe, 0.037mg/shoe, 0.011mg/shoe, 0.09mg/shoe, 0.018mgishoe respectively. This method is suitable for determination of volatile aldehydes and ketones in leather shoes.
Note de contenu : - EXPERIMENTAL PROCEDURE : Main materials and reagents - Laboratory apparatuses and devices - Experimental methods and procedures
- RESULTS AND DISCUSSION : The sampling time of the volatile aldehyde and ketone in leather shoes - Sampling temperature of the volatile aldehyde and ketone in leather shoesEn ligne : https://drive.google.com/file/d/1LMkLPfmap_End_o9fKlCA89GLHW87xkU/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28891
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 4 (07-08/2017) . - p. 179-182[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19176 - Périodique Bibliothèque principale Documentaires Disponible Development and application of a HPLC method for eight sunscreen agents in suncare products / L. M. Peruchi in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 34, N° 3 (06/2012)
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Titre : Development and application of a HPLC method for eight sunscreen agents in suncare products Type de document : texte imprimé Auteurs : L. M. Peruchi, Auteur ; S. Rath, Auteur Année de publication : 2012 Article en page(s) : p. 226-233 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chromatographie en phase liquide à hautes performances
Cosmétiques
Produits antisolairesIndex. décimale : 668.5 Parfums et cosmétiques Résumé : This work describes the development, validation and application of a simple and fast high-performance liquid chromatography-with diode array dectection (HPLC-DAD) method for the determination of eight sunscreen agents: benzophenone-3, octocrylene, ethylhexyl methoxycinnamate, ethylhexyl salicylate, homosalate (used in two isomeric forms), butyl methoxydibenzoylmethane, 4-methylbenzylidene camphor and ethylhexyl dimethyl PABA in sunscreen formulations. The separation of the eight sunscreen compounds was achieved using an ACE C18 column (250 × 4.6 mm, 5 μm), with a column temperature 20°C, and a mobile phase of 88 : 12 (v/v) methanol-water with isocratic elution. Column temperature strongly influences the retention time and resolution of the compounds. The flow rate was 1.0 mL min−1 and quantitation was performed by external calibration at the maximum wavelength of each compound. The sample preparation was simple and consisted basically of sample dilution with methanol, centrifugation and filtration in syringe filters before quantitation. Total run time was 18 min. The method was validated according to the parameters: linear range, linearity, selectivity, intra-day and inter-day precision and accuracy. Ten samples of sunscreen emulsions commercially available in Brazil (SPF 30) from different manufacturers were analysed using the proposed method. The number of the sunscreen agents varied between one and five in a single sample. The concentrations of all compounds were in the range of 0.9–10% (w/w) and were in accordance with the current Brazilian legislation. Note de contenu : - MATERIALS AND METHODS : Equipment - Standards and reagents - Standard solutions - Method validation - Samples
- RESULTS AND DISCUSSION : Chromatography - Validation - Sample analysisDOI : 10.1111/j.1468-2494.2012.00703.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1468-2494.2012.00703.x Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15032
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 34, N° 3 (06/2012) . - p. 226-233[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13924 - Périodique Bibliothèque principale Documentaires Disponible Development and validation of a reversed-phase high-performance liquid chromatographic method for the quantitation and stability of a-lipoic acid in cosmetic creams / S. Papageorgiou in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 42, N° 3 (06/2020)
[article]
Titre : Development and validation of a reversed-phase high-performance liquid chromatographic method for the quantitation and stability of a-lipoic acid in cosmetic creams Type de document : document électronique Auteurs : S. Papageorgiou, Auteur ; Athanasia Varvaresou, Auteur ; I. Panderi, Auteur ; M. Giannakou, Auteur ; C. Spiliopoulou, Auteur ; S. Athanaselis, Auteur Année de publication : 2020 Article en page(s) : p. 221-228 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chromatographie en phase liquide à hautes performances
Emulsions -- Emploi en cosmétologie
Emulsions -- Stabilité
Formulation (Génie chimique)
Lipoïque, AcideL’acide alphalipoïque, également appelé acide thioctique est une substance d’une part apportée par l’alimentation, mais aussi fabriquée à partir de l’acide octanoïque par l’organisme, parfois en quantité insuffisante, à partir de la cystéine. Amphiphile, il exerce une activité antioxydante tant en milieu hydrophile ou aqueux (comme la vitamine C) qu’en milieu lipophile ou graisseux (comme la vitamine E et le ß-carotène).
On le trouve principalement dans les abats, la levure, les feuilles vertes (brocolis, épinards), carottes, betterave…Les compléments alimentaires sont mieux assimilés hors des repas.Index. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : To develop and validate a simple reversed-phase HPLC method for the quantitation and evaluation of stability of alipoic acid in cosmetics, according to International Conference on Harmonization (ICH) Guidelines.
- Methods : The chromatography was performed on a reversed-phase Luna C18, analytical column (150 × 4.6 mm id, 5 µm particle size) with a mobile phase of potassium dihydrogen phosphate (pH 4.5; 0.05 M) and acetonitrile (60:40, v/v) and a flow rate of 1.0 mL min-1 with UV detection at 340 nm. Accelerated and long-term stability studies of alipoic acid in cosmetic cream were conducted under various degradation conditions including acid, basis, oxidation, and thermal and photolytic degradation, according to European Medicines Agency Guidelines CPMP/ICH/2736/99.
- Results : The limit of detection (LOD) for the cosmetic cream was 0.9 µg mLt1 and the limit of quantitation (LOQ) was 2.8 µg mL-1, while the retention time was 7.2 min. The method proved to be linear, precise and accurate. The stability results demonstrated the selectivity of the proposed method to the analysis of aLA, and the degradation products were determined and evaluated in specific stress conditions in cosmetic creams. The applicability of the method was tested in two different developed cosmetic products (cream with 1.5 % w/w and emulsion with 1.0 % w/w of LA) and proved to be reliable.
- Conclusion : A reversed-phase HPLC-UV method was developed and fully validated for the analysis of alipoic acid in cosmetics. It is the first reported application on the quantitation of lipoic acid in cosmetic creams, while at the same time evaluates the stability in forced degradation conditions, in new cosmetic formulations. It proved to be suitable for the reliable quality control of cosmetic products, with a run time of <8 min that allows for the analysis of large number of samples per day.Note de contenu : - EXPERIMENTAL : Instrumentation - Stock and working standard solutions - Cosmetic cream - Samples preparation (Cosmetic cream - Validation procedure)
- RESULTS AND DISCUSSION : Method development - Method validation (Linearity - Precision and accuracy - Specificity - Stability studies - Application to the analysis of cosmetic products)
- Table 1 : Statistical analysis of the calibration curves for the quantitation of a-lipoic acid in cosmetic creams
- Table 2 : Accuracy and precision evaluation of a-lipoic acid in cosmetic creams (3 runs, six replicates per run)
- Table 3 : Stability data for a-lipoic acid in cosmetic cream by RP-HPLC-UV
- Table 4 : Analytical data on the determination of a-lipoic acid in cosmetic products by HPLC-UV.
DOI : https://doi.org/10.1111/ics.12603 En ligne : https://drive.google.com/file/d/1CDGzkfOBUubb4Zme-g1-JdDnLriy1QW3/view?usp=shari [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35269
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 42, N° 3 (06/2020) . - p. 221-228[article]Development of methods for the determination of bisphenol a in food simulants / R. J. Wingender in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 70, N° 877 (02/1998)
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Titre : Development of methods for the determination of bisphenol a in food simulants Type de document : texte imprimé Auteurs : R. J. Wingender, Auteur ; Paul Niketas, Auteur ; Christopher K. Switala, Auteur Année de publication : 1998 Article en page(s) : p. 75-82 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aliments -- Emballages -- Aspect sanitaire
Chromatographie en phase gazeuse
Chromatographie en phase liquide à hautes performances
Contamination chimique
Emballages métalliques
Epoxydes
Matériaux pour les industries agro-alimentaires
Spectrométrie de masse
VernisIndex. décimale : 667.9 Revêtements et enduits Résumé : Epoxy resins based on bisphenol A (BPA) have been used as components of food and beverage can coatings for more than 50 years. The recent interest in analysis of extractable BPA from these resins has made it necessary to develop validated methods with performance characteristics necessary for successful analyses in regulatory food simulants. The present study was conducted to develop analytical methodology so that suitably equipped laboratories could confidently perform these analyses. Two methods were developed and validated through round robin sampling. A historical treatment of the method development challenges, round robin studies, and results are described here. Note de contenu : - EXPERIMENTAL : Can processing - Final HPLC method - Final GC/MS method - Silylation with TMCS - Silylation with BSTFA - Analysis
- RESULTS AND DISCUSSION : Round-robin No. 1 - Round-robin No. 2 - Round-robin No. 3Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17962
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 70, N° 877 (02/1998) . - p. 75-82[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003546 - Périodique Bibliothèque principale Documentaires Disponible Dosage du formaldéhyde dans les cuirs : Comparaison des méthodes par chromatographie liquide et colorimétrie / Nicolas Blanc in CTC ENTREPRISES, N° 1 (01-02/2009)
[article]
Titre : Dosage du formaldéhyde dans les cuirs : Comparaison des méthodes par chromatographie liquide et colorimétrie Type de document : texte imprimé Auteurs : Nicolas Blanc, Auteur ; Nathalie Humbert, Auteur ; Jean-Claude Cannot, Auteur ; Alain Berthod, Auteur Année de publication : 2009 Article en page(s) : p. 15-17 Langues : Français (fre) Catégories : Analyse quantitative (chimie)
Chromatographie en phase liquide à hautes performances
Colorimétrie
Cuir -- Teneur en formaldéhydeIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Evaluer la teneur d'une substance allergène ou cancérigène dans un produit fini implique le développement de méthode d'analyse chimique fiable et reproductible et l'interdiction du diméthylfumarate dans les chaussures en rappelle l'importance. CTC a mené un projet qui a permis de mettre en place une méthode d'analyse du formaldéhyde à partir d'une technologie de pointe, la chromatographie liquide haute pression avec détecteur UV (HPLC/UV).
Ce projet d'envergure, intéressant tous les secteurs de la filière cuir, a fait l'objet d'une thèse de doctorat soutenue par Nicolas Blanc le 15 décembre dernier et d'une publication scientifique dans le Journal of the American Leather Chemists Association (JALCA) de janvier 2009.Note de contenu : - DOSAGE DU FORMALDEHYDE CHROMATOGRAPHIE LIQUIDE/DETECTEUR UV (METHODE 1) : A. Caractérisation de la méthode - B. Stabilité du dérivé formé
- COMPARAISON DES METHODES LC/UV ET COLORIMETRIEEn ligne : https://drive.google.com/file/d/1bSBYHZqkbEcooLCjsOH4xyD_9yGVSXNC/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15048
in CTC ENTREPRISES > N° 1 (01-02/2009) . - p. 15-17[article]Réservation
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