首页    期刊浏览 2024年11月29日 星期五
登录注册

文章基本信息

  • 标题:香粧品の成分試験法に関する研究(第3報) : クロモトロープ酸法による化粧品中のメタノールの定量
  • 本地全文:下载
  • 作者:松本 勲 ; 米山 広勝 ; 田中 国雄
  • 期刊名称:Journal of Health Science
  • 印刷版ISSN:1344-9702
  • 电子版ISSN:1347-5207
  • 出版年度:1971
  • 卷号:17
  • 期号:6
  • 页码:380-383
  • DOI:10.1248/jhs1956.17.380
  • 出版社:The Pharmaceutical Society of Japan
  • 摘要:The content of methanol in cosmetics must be less than 0.2%, and it has been usually analysed by chromotropic acid colorimetry. This method, however, was not always satisfactory owing to the interference of perfumes, surface-active agents, and others in cosmetics. The modified procedure has been developed as follows : 20 ml of water was added to 5 ml of a sample and distilled, 10 ml of the distillate was transferred to a separatory funnel, shaken with 5 ml of petroleum benzine, and K2CO3 was added to the aqueous layer to seperate alcohol. Alcohol layer was made up to 5 ml with ethanol, diluted to 50 ml with water, 0.5 g of active carbon was added, and the filtrate was applied to the colorimetry procedure. Heating time and temperature in the color reaction were corrected to 40 min and 100°. Good reproducibility was obtained by this method.
国家哲学社会科学文献中心版权所有