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醋酸視黃酯檢測項目報價???解決方案???檢測周期???樣品要求? |
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本標準適用于以醋酸視黃酯或β-紫羅蘭酮為起始原料,以化學合成法制得的食品添加劑β-胡蘿卜素。
本標準適用于以β-紫羅蘭酮為主要原料,經化學合成制得的食品營養(yǎng)強化劑醋酸視黃酯(醋酸維生素A或維生素A醋酸酯)。
This European Standard specifies a method for the determination of vitamin A in foodstuffs by high performance liquid chromatography (HPLC). This method has been validated in an interlaboratory study with samples of margarine and milk powder with all-E-retinol levels ranging from 653 μg/100 g to 729 μg/100 g and with 13-Z-retinol levels ranging from 30 μg/100 g to 39 μg/100 g. The determination of vitamin A content is carried out by the measurement of all-E-retinol, 13-Z-retinol and β-carotene. This part covers the measurement of all-E-retinol and 13-Z-retinol. The extract obtained after saponification in this method can be used for the determination of β-carotene, as described in EN 12823-2:2000 Foodstuffs - Determination of vitamin A by high performance liquid chromatography - Part 2: Measurement of β-carotene. In this case, the saponification should not exceed 80°C.