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超声提取-气相色谱法测定土壤中多环芳烃(PAHs)的实验研究 总被引:1,自引:0,他引:1
《应用化工》2017,(3):597-600
为对土壤中多环芳烃(PAHs)进行方便、快速、准确的检测,采用土壤中PAHs的超声提取-气相色谱测定的实验方法,16种多环芳烃的平均加标回收率为85.6%~110.2%,表明利用此方法测定土壤中多环芳烃方法简便、结果准确。在最优条件下,即超声提取60 min、V(CH2Cl2)∶V(环己烷)=1∶1、提取剂共30 m L时,提取多环芳烃总含量最多。实际土样测定结果表明,16种多环芳烃皆有检出,总量最多为35 mg/kg,其中以4~6环的多环芳烃为主,强致癌物苯并芘的平均值为0.020 mg/kg。 相似文献
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构建了多环芳烃的固相萃取预备处理方式和高效液相色谱检验方式,并构建了相应的预备处理方式和色谱条件。在该方式下,先行调节的15种多环芳烃均能获得理想的聚集和提炼效果,同时这15种多环芳烃均能获得理想的分开和检验实际效果。获得的15种多环芳烃的标准曲线相关系数均比较理想,相关系数R2值均超过0.99,线性范畴为0.01~2 mg/L。浓度较高的和浓度较低的再回收率均超过73.1%。由此可见,实验操作中高效液相色谱法是安全可靠的,能够很好地检测废水里多环芳烃的成分。实验操作中煤化工废水中可检验到15种多环芳烃单体。 相似文献
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土壤中多环芳烃的预处理及含量分析方法综述 总被引:1,自引:0,他引:1
概述了国内外土壤样品中多环芳烃(PAHs)的预处理及含量分析方法的研究现状,其中提取方法包括索氏提取、超声提取、微波提取(MAE)、加速溶剂萃取(ASE)、超临界流体萃取(SFE)及其协同提取方法等。测定方法有高效液相色谱(HPLC)法、气相色谱-质谱联用(GC/MS)法和恒能量同步荧光(CESF)法等。对各种提取和分析方法进行了比较并对土壤样品中多环芳烃前处理和分析检测技术的发展进行展望。 相似文献
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介绍了橡胶制品中多环芳烃(PAH)的危害及来源,采用气质联用(GC/MS)结合内标法,建立了测定橡胶制品中18种PAH含量的方法。制品的超声波提取液经GC/MS选择离子监测模式采集数据后,根据内标法建立标准曲线,计算其中的PAH含量。经精密度和回收率验证,本方法灵敏、准确、可靠,适用于橡胶制品中PAH含量的测定。 相似文献
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概述欧盟2005/69/EC指令【多环芳烃(PAHs)指令】和欧盟REACH法规对轮胎中有PAHs含量的限制。介绍气相色谱、气相色谱一质谱、高效液相色谱、液相色谱一质谱和核磁共振等检测方法在PAHs检测中的应用。分析核磁共振检测PAHs的特点和ISO21464:2012与ISO21464:2009中核磁共振检测方法的差异,提出我国轮胎企业应采用与欧盟环保法规同步的核磁共振法检测PAHs。 相似文献
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Alba Giacalone Antonio Gianguzza Maria Rosaria Mannino Santino Orecchio Daniela Piazzese 《Polycyclic Aromatic Compounds》2013,33(2):135-149
The content of 21 polycyclic aromatic hydrocarbons (PAHs) were determined in 16 samples of sediments collected from Ganzirri and Faro marine coastal lagoons in Messina, Italy. Analysis was performed by gas chromatography/mass spectrometry (GC/MS) in selected ion monitoring (SIM) mode. The total concentration of polycyclic aromatic hydrocarbons (ΣPAHs) ranged from 74 to 5755 μg/kg of dry matrix. The resulting distributions and molecular ratios of specific compounds are discussed in terms of sampling location and origin of organic matter. The results obtained show that levels of contamination are not homogeneous throughout the stations, while the relative distributions of PAHs are homogeneous in most of the sampling stations. The organic matter content and PAH concentration were found to be correlated (r = 0.90). It is also shown that the pyrolytic origin is the main source of these compounds in Ganzirri and Faro Lakes sediments. 相似文献
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Dianne L. Poster Maria J. Lopez De Alda Stephen A. Wise Jane C. Chuang Judy L. Mumford 《Polycyclic Aromatic Compounds》2013,33(1-4):79-95
Three types of combustion sample extracts, smokeless coal, smoky coal, and wood, were analyzed for a range of polycyclic aromatic hydrocarbons (PAHs) and polycyclic aromatic sulfur heterocycles (PASH). Standard Reference Material (SRM) 1597, Complex Mixture of PAHs from Coal Tar, was also analyzed as a control sample and for the determination of a larger number of PAHs relative to those determined previously. Target analytes included many alkyl-substituted PAHs such as dimethylphenanthrenes, methylfluoranthenes, and methylpyrenes. The analytical methods included sample clean-up and the selection of specific stationary phases to accomplish unique separations of PAHs. Clean-up involved the use of normal-phase liquid chromatographic isolation of PAHs based on the number of aromatic carbons and a total PAH fraction, PAHs in the resulting fractions were separated by gas chromatography using two stationary phases with different selectivities and analyzed using mass spectrometry. These methods are discussed below and results are presented with an emphasis on the relative concentrations and distribution of PAHs in the combustion samples. 相似文献