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CNS 3651-2003 Method of test for edible oils and fats－Cloud point test《食用油脂检验法－混浊点之测定》.pdf

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1、 1 印行年月 94 年 10 月 本標準非經本局同意不得翻印 中華民國國家標準 CNS 總號 類號 食用油脂檢驗法混濁點之測定 ICS 67.200.10 3651 N6086 經濟部標準檢驗局印行 公布日期 修訂公布日期 62 年 9 月 1 日 92 年 9 月 9 日 (共 1 頁 )Method of test for edible oils and fats Cloud point test 1. 適用範圍：本標準規定食用油脂類混濁點之測定法。 2. 方法 2.1 稱取先經濾紙過濾完全脫水的試樣 60-75 g，加熱至 130 ，趁熱倒入小試管A 至標線 (如圖 )，將溫度計 (1

2、/5 刻度 )插入小試管之中央將溫度計插入樣品瓶後放入水浴中。 2.2 燒杯 D 中注入較預期混濁點高約 20 之溫水，至試樣溫度與溫水溫度相差 5 時，調節冷卻速度於每分鐘 0.5 ，水浴溫度宜控制在低於混濁點 2-5 ，當試樣溫度到達比混濁點高 10 時，須迅速不斷的轉圈攪動，以防止試管邊或底部凝固。若試 樣混濁點低於水溫，則水浴槽用冰或其他冷卻劑冷卻，直至試樣溫度到達預期混濁點以上約 5 。之後每 1 分鐘取出大試管 (B)觀察之，如插於小試管 (A)之溫度計水銀球周圍若已有混濁現象時，即記錄此時之溫度為混濁點。 A：小試管 B：大試管 C：溫度計 D：燒杯 E：橡皮塞 (直徑 14mm， 30mm， 135mm 各一個 ) F：攪拌棒 (下端為直徑 60mm 之圓環，不銹鋼製，鋼線直徑 2mm) 相對應國際標準： AOCS Official Method Cc 6-25(97) Cloud Point Test 修訂日期：第一次修訂： 71 年 1 月 28 日

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