High-throughput screening of samples is the strategy of choice to detect occupational exposure biomarkers, yet it requires a user-friendly apparatus that gives relatively prompt results while ensuring high degrees of selectivity, precision, accuracy and automation, particularly in the preparation process. Miniaturization has attracted much attention in analytical chemistry and has driven solvent and sample savings as easier automation, the latter thanks to the introduction on the market of the three axis autosampler. In light of the above, this contribution describes a novel user-friendly solid-phase microextraction (SPME) off- and on-line platform coupled with gas chromatography and triple quadrupole-mass spectrometry to determine urinary metabolites of polycyclic aromatic hydrocarbons 1- and 2-hydroxy-naphthalene, 9-hydroxy-phenanthrene, 1-hydroxy-pyrene, 3- and 9-hydroxy-benzoantracene, and 3-hydroxy-benzo[a]pyrene. In this new procedure, chromatography’s sensitivity is combined with the user-friendliness of N-tert-butyldimethylsilyl-N-methyltrifluoroacetamide on-fiber SPME derivatization using direct immersion sampling; moreover, specific isotope-labelled internal standards provide quantitative accuracy. The detection limits for the seven OH-PAHs ranged from 0.25 to 4.52 ng/L. Intra-(from 2.5 to 3.0%) and inter-session (from 2.4 to 3.9%) repeatability was also evaluated. This method serves to identify suitable risk-control strategies for occupational hygiene conservation programs.
样本的高通量筛查是检测职业暴露生物标志物的首选策略,但它需要一个用户友好的装置,能够提供相对迅速的结果,同时确保高度的选择性、精度、准确性和自动化,特别是在准备过程中。微型化在分析化学中引起了广泛关注,并推动了溶剂和样品的节约,使自动化变得更加容易,后者得益于市场上引入的三轴自动进样器。鉴于上述情况,本文描述了一种新型用户友好的固相微萃取(SPME)离线和在线平台,与气相色谱和三重四极质谱相结合,以确定多环芳烃1-和2-羟基萘、9-羟基菲、1-羟基芘、3-和9-羟基苯并蒽以及3-羟基苯并[a]芘的尿代谢物。在这种新程序中,色谱的灵敏度与N-叔丁基二甲基硅烷-N-甲基三氟乙酸酰胺在纤维SPME衍生化的用户友好性相结合,采用直接浸入取样;此外,特定同位素标记的内标提供定量准确性。七种OH-PAHs的检测限范围从0.25到4.52 ng/L。还评估了内部(从2.5到3.0%)和会话间(从2.4到3.9%)的重复性。该方法有助于确定适合职业卫生保护计划的风险控制策略。