The influence of relative humidity on the level of Cr(VI) in level of Cr(VI) in chrome-tanned leather / Yu Congzheng in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 5 (09-10/2005)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 89, N° 5 (09-10/2005) . - p. 194-198 Titre : The influence of relative humidity on the level of Cr(VI) in level of Cr(VI) in chrome-tanned leather Type de document : texte imprimé Auteurs : Yu Congzheng, Auteur ; Liu Pengjie, Auteur ; Sun Genxing, Auteur ; Duan Liming, Auteur ; Ren Huijun, Auteur Année de publication : 2005 Article en page(s) : p. 194-198 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Air -- Humidité Cuir -- Teneur en chrome hexavalent Cuirs et peaux -- Analyse pH Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The influence of relative humidity of the environment on the level of Cr(VI) in chrome-tanned leather was studied. The experiments were carried out as follows : a leather sample was cut into pieces which were stored in different relative humidities followed by determination of Cr(VI). Subsequently, these same pieces were stored at different relative humidities followed by re-determination of the Cr(VI) levels. To confirm the influence of relative humidity, pieces of leather soaked in dichromate solution were dried and then subjected to similar treatment as was given to the earlier leather samples. The results showed that there is a close relationship between the stored humidity and Cr(VI) levels in leather. The higher the relative humidity, the lower the level of Cr(VI) and vice versa. Note de contenu : - EXPERIMENTAL PROCEDURE : Experimental scheme - Determination of the iodine value of the fatliquor (GB5532-85) - Determination of Cr(VI) level in leather according to IU C- 18 standard of the IULTCS - comparing influences of pH value and humidity on chrome (VI) level in leather - Influence of different humidities on the Cr(VI) content in leather - Influence of humidity reversed adjustment on Cr(VI) content in leather - Intensifying treatment of leather samples - RESULTS AND DISCUSSION : Determination of the iodine value of different fatliquors and the corresponding Cr(VI) contents in leather - Determination of pH values of the stored leathers in different humidities - Cr(VI) content in leather stored at different humidity - Influence of humidity reversed adjustment on Cr(VI) content in leather - Intensifying experiment on different humidity of leathers and different Cr(VI) solutions En ligne : https://drive.google.com/file/d/1LnO09Mpg3he-RIIhOwtrlOmyIWRBMVux/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39229 [article]

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