| 李天雨，李井涛，王潇，等.顶空-气相色谱法测定食用油中苯和正己烷的残留量[J].中国油脂,2017,42(11):.[LI Tianyu, LI Jingtao, WANG Xiao，etc.Determination of residual amounts of benzene and n-hexane in edible oil by head-space GC[J].China Oils and Fats,2017,42(11):.] |
| 顶空-气相色谱法测定食用油中苯和正己烷的残留量 |
| Determination of residual amounts of benzene and n-hexane in edible oil by head-space GC |
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| DOI： |
| 中文关键词: 食用油 正己烷 苯 残留 气相色谱法 |
| 英文关键词:edible oil n-hexane benzene residual GC |
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| 中文摘要: |
| 采用顶空-气相色谱法测定食用油中苯和正己烷的残留量。选择顶空进样器的平衡温度和平衡时间分别为120?℃和30 min；采用FID检测器，HP-5毛细管柱分离，顶空进样。重点考察了方法的线性、重复性、回收率和仪器的精密度。结果表明：苯和正己烷的线性范围分别为1.26～12.64 μg、0.92～9.28 μg，线性方程分别为Y=12.453X+11.15（r=0.999 6）、Y=82.56X+59.466（r=0.999 7）；苯和正己烷的检出限分别为0.063 0、0.046 4 μg/mL，加标回收率分别为96.2%（RSD=1.91%）、93.8%（RSD=1.63%）。该方法灵敏度高，定量准确，具有简单实用的特点，适合食用油中苯和正己烷的残留检测。 |
| 英文摘要: |
| Head-space GC was applied in determination of residual amounts of benzene and n-hexane in edible oil. The equilibrium temperature and equilibrium time of head space sampler were 120?℃ and 30 min, respectively. The samples were separated by HP-5 column and detected by FID with head-space sampling. The linearity,repeatability, recoveries of method and precision of machine were investigated. The results showed that the linear range of benzene and n-hexane were 1.26-12.64 μg and 092-9.28 μg, and the linear equation of benzene and n-hexane were Y=12.453X+11.15（r=0.999 6），Y=82.56X+59.466（r=0.999 7）. The limits of detection and recoveries of benzene and n-hexane were 0.063 0 μg/mL, 0.046 4 μg/mL, 96.2% （RSD=1.91%） and 93.8%（RSD=1.63%）, respectively. The methods was highly sensitive with good selectivity and accurate quantification，which was simple and practical, and suitable for determination of benzene and n-hexane in edible oil. |
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