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| 浊度仪法快速测定菜籽油中蜡质含量 |
| Rapid determination of wax content in rapeseed oil by turbidity instrument |
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| DOI： |
| 中文关键词: 菜籽油 浊度仪 蜡质含量 快速检测 |
| 英文关键词:rapeseed oil turbidity instrument wax content rapid determination |
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| 中文摘要: |
| 为了适应菜籽油中蜡质含量快速测定的要求，根据植物油中的蜡质在低温时会结晶析出，引起植物油浊度变化，利用浊度仪建立了菜籽油中蜡质含量的快速测定方法。考察了溶剂种类、溶剂与油的体积比（溶剂比）、冷却时间对菜籽油中蜡质含量测定的影响。结果表明：以丙酮为溶剂、溶剂比为1∶1、冷却时间为30 min，在蜡质含量为0～250 mg/kg时，所建立方法的线性方程 为Y=0.078 7X-0.036 5，相关系数R2=0.999，加标回收率为87.84%～110.42%，相对标准偏差（RSD）为1.13%～2.89%。该方法具有良好的准确度和可行性，数据分析简单，对操作人员的专业要求不高，适合工厂蜡质含量的监控要求。 |
| 英文摘要: |
| In order to meet the requirement of rapid determination of wax content in rapeseed oil, a new method for the determination of wax content in rapeseed oil by turbidity instrument was established, according to the wax in vegetable oil would crystallize and precipitate at low temperature and the turbidity would change. The effects of solvents, volume ratio of solvent to oil and cooling time on wax content in rapeseed oil were investigated. The results showed that the optimal conditions were obtained as follows: with acetone as solvent, volume ratio of solvent to oil 1∶1 and cooling time 30 min. Under the optimal experimental conditions, when the wax content was 0-250 mg/kg, the linear equation of the method was Y=0.078 7X-0.036 5, R2=0.999. The recovery of standard addition was 87.84%-110.42%, and RSD was 1.13%-2.89%. The method had excellent feasibility and accuracy, and was easy for operators to analyze. It could be used for the routine monitoring of wax content in factory. |
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