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浓缩还原橙汁饮料中果汁含量快速检测方法探究 被引量:2

Study on the rapid detection method of determining raw juice content in refrigerated orange juice from concentrated
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摘要 果汁含量是浓缩还原橙汁的主要质量指标,也是判定其是否掺假的重要依据。本研究发现:不同产地、不同果汁含量的浓缩还原橙汁饮料中,可溶性物质在325nm紫外波长处有特征吸收,并且与22种常用添加剂溶液的紫外吸收有明显区分;采用自主研制的快速检测设备,将橙汁中可溶性物质按分子量大小分离,325nm下连续检测,得到橙汁可溶性物质按分子量大小分布的紫外特征吸收峰,其峰面积与橙汁含量呈现正相关;以100%巴西浓缩还原橙汁为标准参照,用外标法计算果汁含量。该方法样品前处理简单,只需过滤、超声,即可经凝胶色谱柱分离、检测;色谱柱分离和325nm的检测波长,有效避免了22种常用添加剂对果汁含量检测的干扰;该方法精密度高(RSD<6.0%)、线性关系好(R2=0.9988)、抗干扰性强,可用于果汁含量大(等)于10%的橙汁饮料中原果汁含量的快速、大批量检测。 Juice content was one of the main quality indicators of refrigerated orange juice from concentrated(ROJFC) and also the important basis for authenticity assessment. The result showed that the soluble substances in orange juices from different origins and orange juices with different raw juice content had characteristic absorption in the wavelength of 325 nm,which had clear distinction with the ultraviolet absorption of 22 kinds of common additives. The soluble substances were separated by self-developed rapid detection equipment and continuously detected in the wavelength of 325 nm. By this method,the absorption peaks of soluble substances which were separated according to the molecular weight size were obtained. The peak area was positively related with orange juice content. With 100% Brazil orange juice as standard reference,the raw juice content of orange juices were calculated by the external standard method. The sample pretreatment was simple,samples were detected just after filtration and ultrasonic degassing. Column separation and the325 nm detection wavelength could effectively avoid the interference of 22 kinds of common additives. This method had high precision(RSD〈6.0),good linear relationship(R2=0.9988),strong anti-interference ability and could be used to detect the raw juice content of orange juice(raw juice content≥10%) fast and in large scale.
出处 《食品工业科技》 CAS CSCD 北大核心 2015年第8期72-77,共6页 Science and Technology of Food Industry
基金 国家科技部质检公益性行业科研专项(201310150)
关键词 浓缩还原橙汁 可溶性物质 果汁含量 快速检测 refrigerated orange juice from concentrated soluble substances juice content rapid detection
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参考文献10

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