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一、浸泡条件:蒸溜水:60℃保温2小时。4%醋酸:60℃保温2小时。65%乙醇:常温(20℃左右)2小时。正己烷:常温(20℃左右)2小时。以上浸泡液以接触面积2毫升/平方厘米加入,盛器则以盛满容器为准。二、高锰酸钾消耗量:试剂:1、0.01N 高锰酸钾溶液。2、0.01N 草酸溶液。3、稀硫酸:1份硫酸加2份水。方法:精密吸取经浸泡食具后的水浸泡液100毫升,加稀硫酸5毫升及0.01N 高锰酸钾10毫升,准确煮沸5分钟后,乘热加入0.01N 草酸10毫升,再以0.01N 高锰酸钾滴定至微红色(a),另取不经食具浸泡的同一浸泡液100毫升,按上法同样操作(b)。
First, soaking conditions: distilled water: 60 ℃ incubated for 2 hours. 4% acetic acid: 60 ° C for 2 hours. 65% ethanol: room temperature (about 20 ℃) 2 hours. N-hexane: room temperature (about 20 ℃) 2 hours. The above soaking liquid to the contact area of 2 ml / cm2 add, container is filled containers prevail. Second, potassium permanganate consumption: Reagents: 1,0.01N potassium permanganate solution. 2,0.01 N oxalic acid solution. 3, dilute sulfuric acid: 1 part sulfuric acid plus 2 parts water. Methods: 100 ml of water immersion liquid after soaking the utensil was carefully drawn, 5 ml of dilute sulfuric acid and 10 ml of 0.01N potassium permanganate were added. After boiled for 5 minutes, 10 ml of oxalic acid 0.01N Titration of potassium permanganate to reddish (a), the other non-utensil soaked with 100 ml of the same soaking solution, the same operation as the above method (b).