应用报告-思聚仪器仪表（上海）有限公司

Centri 257 Improving the performance of SPME using trap-based preconcentration with enrichment This study shows that enhancing conventional SPME by using trap-based preconcentration, with enrichment by ‘sample stacking’, greatly improves the number of compounds identified, thus expanding the applicability of SPME in GC–MS analysis.
全二维气相应用指南 20 世纪70 年代，GC × GC 首次引起人们关注，然而，多年以来传统GC–MS 技术依然发展迅速，这意味着尽管新技术具有卓越的分离性能，但并不值得运用如此额外复杂的技术。由于硬件和软件的进步，这种情况已经大为改观，GC × GC 现在广泛应用于各种领域。本指南仅仅展示GCxGC全二维气相部分最重要的应用。
Centri 256 Analysis of volatile organic pollutants in water using headspace–trap GC–MS: Maximising performance for ppt-level VOCs This study demonstrates the analysis of a broad range of trace-level volatile organic compounds in drinking water using the headspace–trap sampling mode of the Centri automated multi-mode sampling and concentration system. Analysis of a 72-component standard mix using GC–MS with selected ion monitoring (SIM) acquisition provided mean detection limits as low as 2 ppt, with excellent mean linearities (R2 0.999), recoveries (97.8%) and repeatabilities (4.7% RSD) – performance that is comfortably lower than required by all major regulations. In addition, tap water was analysed and found to contain a range of VOCs at low-to-medium levels (2–200 ppt), in addition to ppb-level chlorinated compounds.
Centri 255 基于冷阱富集聚焦的预浓缩技术与GC-MS联用定量分析水中痕量异味物质：SPME固相微萃取和Hisorb高容量吸附萃取棒的性能对比这项研究表明，使用新型Centri®自动化多模式采样和浓缩系统提取和浓缩水中的痕量异味化合物，使用两种顶空进样方法SPME固相微萃取和HiSorb高容量吸附萃取棒——基于冷阱富集聚焦的预浓缩技术与GC-MS联用进行数据分析。目标分析物IPMP，IBMP，2-MIB，2,4,6-TCA和土臭味素的性能符合ISO 17943和GB 5749的要求，线性> 0.996，平均MDL约为1 ppt。我们还描述了每种采样方法的关键属性，并讨论了Centri提供的选项，这些选项允许根据特定的应用要求进行最佳匹配。
Centri 255 Quantifying trace odorants in water by GC–MS with trap-based preconcentration: Assessing SPME and high-capacity sorptive extraction This study describes the use of the new Centri sample automation and concentration platform to extract and quantify trace-level odorants in water, using two headspace sampling methods – multi-phase SPME fibers or HiSorb high-capacity sorptive extraction probes – in conjunction with trap-based preconcentration and GC–MS. Performance for the target analytes IPMP, IBMP, 2-MIB, 2,4,6-TCA and geosmin was within the requirements of ISO 17943 and GB 5749, with linearities >0.996 and mean MDLs of the order of 1 ppt. We also describe the key attributes of each sampling method, and discuss the options offered by Centri that allow the optimum choice to be made based on specific application requirements.
centri 254 利用Hisorb高容量萃取棒与GC-MS联用检测红酒中低浓度异味化合物这项研究表明，使用高容量HiSorb探针进行浸入式吸附萃取，在新型Centri®自动化多模式采样和浓缩平台上进行气相色谱质谱（GC/MS）检测，可用于筛选葡萄酒中ppb级水平的两种酵母衍生的变质（腐坏）化合物，以及一系列其他化合物。
Centri 254 Identifying low-level odorants in wine by automated high-capacity sorptive extraction with GC–MS This study shows that immersive sorptive extraction using high-capacity HiSorb probes, automated on the new Centri multi-mode sampling and concentration system for gas chromatography–mass spectrometry (GC–MS), can be used to screen wine for ppb levels of two yeast-derived spoilage compounds, as well as a range of other compounds.

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