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| 油脂脱臭馏出物中多环芳烃含量及检测方法研究 |
| Content and detection method of polycyclic aromatic hydrocarbons in oil deodorizer distillate |
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| DOI： |
| 中文关键词: 油脂脱臭 脱臭馏出物 多环芳烃 检测方法 |
| 英文关键词:oil deodorization deodorizer distillate polycyclic aromatic hydrocarbons detection method |
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| 中文摘要: |
| 植物油精炼的副产物——脱臭馏出物是提取和生产天然维生素E和植物甾醇的原料，针对油脂脱臭馏出物特殊的黏稠性状和复杂组分，对其中多环芳烃（PAHs）含量检测方法和样品前处理条件进行优化研究，建立了液液分配萃取-硅胶SPE柱净化-同位素稀释法-气相色谱串联质谱法（GC-MS）定量检测油脂脱臭馏出物中16种PAHs的方法。结果表明：油脂脱臭馏出物中16种PAHs的检出限和定量限分别为0.10~0.28 μg/kg和0.33~0.92 μg/kg，回收率为83.92%~11234%，方法检测灵敏度高、稳定性好、定性及定量准确，能很好地满足对脱臭馏出物中PAHs的检测。利用优化的检测方法分别对6个不同的脱臭馏出物样品中PAHs含量进行检测分析，结果发现脱臭馏出物中BaP、PAH4、PAH16的平均含量分别为11.89、217.19、2 268.85 μg/kg，其中LPAHs是主要的PAHs污染物，占PAH16总量的90.34%~95.61%。结果提示在利用油脂脱臭馏出物作为维生素E和植物甾醇的提取原料时应充分注意其多环芳烃的安全风险。 |
| 英文摘要: |
| Deodorizer distillate, the by-product of vegetable oil refining, is the raw material for extraction and production of natural vitamin E and phytosterol. Based on the special viscous traits and complex components of deodorizer distillate, the detection methods of polycyclic aromatic hydrocarbons (PAHs) and the pretreatment conditions of samples were optimized. The liquid-liquid extraction-silica SPE column purification-isotope dilution-GC-MS method for quantitative detection of 16 PAHs in deodorizer distillate was established. The limits of detection and the limits of quantitation for PAHs were 0.10-028 μg/kg and 0.33-0.92 μg/kg, respectively. The recoveries ranged from 83.92% to 112.34%. Therefore, the method had high detection sensitivity, good stability, qualitative and quantitative accuracy, and could meet the detection of PAHs in deodorizer distillate. Through the detection and analysis of PAHs content in six deodorizer distillate samples, the average contents of BaP, PAH4 and PAH16 in deodorizer distillate were 11.89, 217.19, 2 268.85 μg/kg, respectively. LPAHs were the main PAHs pollutants accounting for 90.34%-95.61% of PAH16 in deodorizer distillate. The results suggested that the use of deodorizer distillate as raw material for the extraction of vitamin E and phytosterols should pay full attention to the safety risks of its PAHs. |
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