| 萃取－同步荧光光谱法测定大气飘尘中苯并(a)芘 |
| 摘要点击 651 全文点击 495 修订日期：1993-09-10 |
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| 中文关键词 苯并(a)芘 同步荧光光谱 萃取 大气飘尘 |
| 英文关键词 benzo (a) pyrene synchronous fluorescent spectrometry extraction airborne particulates |
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| 中文摘要 |
| 提出用浓H2SO4从大气飘尘样品的环己烧提取液中一次萃取后,用同步荧光光谱测定苯并(a)芘的方法。选用△λ为20nm时可获最佳效果,用浓硫酸萃取的时间仅1min,苯并(a)芘在浓硫酸相中1h内稳定,样品加标的回收率为85%,其它多环芳烃化合物在530-600nm的测定波长范围不干扰苯并(a)芘的测定。用乙酰化滤纸层析-荧光分光光度的统一方法作为对比对实际样品进行了测定,结果与后者的偏差在±15%以内,分析周期可缩短24h。 |
| 英文摘要 |
| A rapid and effective method for detecting benzo(a) pyrene in airborne particulates was developed, in which benzo (a) pyrene was extracted in an one minute step with concentrated sulfuric acid from a cyclohexane extracted solution from the airborne particulates, and then determined with a synchronous fluorescent speetrometry. The best results were obtained at ac of 20urn.Benzo (a) pyrene in the concentrated sulfuric acid phase was stable within 1 hour.The recovery was found to be 85% for 0.10 ig of benzo(a)pyrene standard. No interference with other polynuclear aromatic hydrocarbons was found in the range of 530-600 urn of synchronous fluorescent spectra. For a comparison, the samples were also determined by using the unified method of acetylized paper TLC/ fluorescent photospectrometry,with the results in a variance of 15% between both methods. The analytical cycle for the present method can shorten by 1 hour. |
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