Poster Dianne L, Schantz Michele M, Sander Lane C, Wise Stephen A
Analytical Chemistry Division, National Institute of Standards and Technology, Gaithersburg, MD 20899-8392, USA.
Anal Bioanal Chem. 2006 Oct;386(4):859-81. doi: 10.1007/s00216-006-0771-0. Epub 2006 Sep 21.
Polycyclic aromatic hydrocarbons (PAHs) are frequently measured in the atmosphere for air quality assessment, in biological tissues for health-effects monitoring, in sediments and mollusks for environmental monitoring, and in foodstuffs for safety reasons. In contemporary analysis of these complex matrices, gas chromatography (GC), rather than liquid chromatography (LC), is often the preferred approach for separation, identification, and quantification of PAHs, largely because GC generally affords greater selectivity, resolution, and sensitivity than LC. This article reviews modern-day GC and state-of-the-art GC techniques used for the determination of PAHs in environmental samples. Standard test methods are discussed. GC separations of PAHs on a variety of capillary columns are examined, and the properties and uses of selected mass spectrometric (MS) techniques are presented. PAH literature on GC with MS techniques, including chemical ionization, ion-trap MS, time-of-flight MS (TOF-MS), and isotope-ratio mass spectrometry (IRMS), is reviewed. Enhancements to GC, for example large-volume injection, thermal desorption, fast GC, and coupling of GC to LC, are also discussed with regard to the determination of PAHs in an effort to demonstrate the vigor and robustness GC continues to achieve in the analytical sciences.
多环芳烃（PAHs）常用于空气质量评估的大气监测、健康影响监测的生物组织检测、环境监测的沉积物和软体动物检测以及出于安全考虑的食品检测。在对这些复杂基质进行当代分析时，气相色谱法（GC）而非液相色谱法（LC）通常是分离、鉴定和定量多环芳烃的首选方法，这主要是因为GC一般比LC具有更高的选择性、分辨率和灵敏度。本文综述了用于测定环境样品中多环芳烃的现代气相色谱法和最先进的气相色谱技术。讨论了标准测试方法。研究了多环芳烃在各种毛细管柱上的气相色谱分离，并介绍了所选质谱（MS）技术的特性和用途。综述了有关采用化学电离、离子阱质谱、飞行时间质谱（TOF-MS）和同位素比质谱（IRMS）等质谱技术的气相色谱法的多环芳烃文献。还讨论了为测定多环芳烃而对气相色谱法的改进，例如大体积进样、热脱附、快速气相色谱以及气相色谱与液相色谱的联用，以展示气相色谱法在分析科学中持续展现出的活力和稳健性。
