CNS 3645-2003 Method of test for edible oils and fats-Determination of refractive index《食用油脂检验法-折射率之测定》.pdf

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1、 1 印月 94 10 月 本標準非經本局同意得翻印 中華民國國家標準 CNS 總號 號 食用油脂檢驗法折射率之測定 ICS 67.200.10 3645 N6080 經濟部標準檢驗局印 公布日期 修訂公布日期 62 9 月 1 日 92 9 月 9 日 (共 1 頁 )Method of test for edible oils and fats Determination of refractive index 1. 適用範圍:本標準規定食用油脂折射之測定法。 2. 方法:取試樣 10 至 15g,置於試管內,加溫熔解後,用紙過,取液 1 至 2滴塗於阿貝折射計 (Abbes refrac

2、tometer)三玻璃面上,然後閉合,通入溫水,使其鏡內溫全部均一時到達測定溫時 (1),旋動觀察管至明暗界線最清晰時,測取其刻 (R )及同時之溫 (T )。依下公式計算折射 (20 ) (T ): R= R + K(T T) R=標準規定溫之折射 R實際測定溫( T)之折射 T =實際測定溫 T=標準規定溫 K=常 (factor), 20測定者為 0.00035 40、 50及 60測定者為 0.00036 油脂種 標準規定溫()橄欖油 20 花生油、大豆油、芥花油、芝麻油、紅花籽油、高油酸紅花籽油、玉米油、棉籽油、葵花籽油、高油酸葵花籽油、椰子油、棕櫚仁油、可可脂、軟質棕油、豬脂、牛羊脂、熬製豬脂 40 棕櫚油 50 硬質棕油 60 註 (1) 實際測定溫與標準規定溫之差值應 3 相對應國際標準: ISO 6320: 2000 Animal and vegetable fats and oilsDetermination of refractive index 修訂日期:第一次修訂: 68 4 月 24 日 第二次修訂: 71 1 月 28 日 第三次修訂: 75 11 月 19 日

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