牛乳用 紙栓의 螢光增白劑 檢出試驗

Detection of Fluorescent Bleaching Agents in Paper Caps for Milk Bottle

Contamination of fluorescent bleaching agents in paper caps for milk bottle and various kinds of orginal paper tissue used for paper caps were examined by ultraviolet ray irradiation method, and also the possibilities of elution into milk and various kiqds of water tested. The results obtained were summarized as follows. 1. Fluorescent bleaching agents could not be detected. in paper caps newly developed since July, 1977. 2. Such original materials used for paper caps as rosin side, talc and aluminum sulfate rosin side only contained 1 mg fluorescent bleaching agent per ml. 3. Fluorescent bleaching agents were detected in typing paper, rough paper, reclaimed paper for toilet and paper box, while these could not be detected in filter paper, reference card paper and coping paper. 4. Fluorescent bleaching agents infiltrated in paper caps were not extracted in milk and various kinds of water.