对于静态和动态顶空分析，只有一个专用工具在PAL System使用，并且可以立即使用。即使是用于液体进样或固相微萃取 （SPME）的所有其他工具也可以用于其他方法，且无需任何硬件更改，使PAL System成为任何类型样品的真正多种进样方式设备
  U.S. EPA, 2014. Method 5021A. Volatile Organic Compounds in Various Sample Matrices using Equilibrium Headspace Analysis. SW-846 Update V, Rev.2.
Analysis of Volatile Organic Compounds in Durian by Static Headspace and ITEX-DHS GC-MS
The distinctive onion and fruity odorous compounds were detected by both static headspace and ITEX-DHS techniques.
How to Develop a Method using In-tube Extraction (ITEX) for GC and GC/MS?
In this App Note we focused on in-tube extraction (ITEX) as a powerful alternative to classic purge & trap analysis. The approach is particularly well suited for the analysis of trace organic compounds with a wide range of volatilities. Due do the simplicity of the system, it can be applied successfully to the analysis of heavily loaded samples without the risk of cross contamination and permanent system failure.
A Comparison of ITEX Dynamic Headspace–GC/MS to other Enrichment Techniques for Analysis of Flavoring Compounds
The automated ITEX Dynamic Headspace unit demonstrated equivalent accuracy and precision when compared to purge and trap and overall was more sensitive than the other enrichment techniques. The ITEX unit allows for automated analysis and optimization of conditions which drastically reduces analyst’s time when compared to performing the experiments manually with the purge and trap without any reduction in sensitivity, accuracy and reproducibility.
Analysis of volatile compounds from honeys to differentiate plant and geographical origins
The analysis of volatile organic compounds (VOCs) is a faster approach to identify the honey’s origin than traditional methods, which is important for the quality control of honeys. In-tube extraction dynamic headspace (ITEX-DHS) is a fully automated microextraction technique, in which the enrichment of analytes takes place by repeated aspiring and dispensing of the sample headspace through a sorbent trap
Analysis of flavors, pesticides, and biomarkers directly from complex food matrix using the automated Vacuum In-Tube Extraction (V-ITEX)
Extraction of volatile compounds is a widely used approach for analysis of foods and beverages. By the nature of gas phase sampling, the limiting factor for polar analytes are given by low vapor pressure or higher boiling points of semi-volatile compounds. These limitations can be overcome by sampling at decreased pressure levels using vacuum conditions. This has been shown in several publications using vacuum sampling techniques. In this study, a fully automated approach of Vacuum In-Tube Extraction (V-ITEX) is presented, a simple and fully automated technique using PAL system autosamplers. The application examples include flavors, fragrances, off-flavors, pesticides and biomarkers by extractions directly from the food sample matrix, such as Honey, Bee Wax, Cheese, Onions, Blood and Urine.
Pascal Fuchsmann, Head of Flavor Analytics Agroscope
Stefan Cretnik, Product Manager CTC Analytics AG