首页>
外国专利>
THERMAL DESORBER FOR GAS CHROMATOGRAPHY SAMPLE INTRODUCTION WITH IMPROVED COMPOUND RECOVERY AND ENHANCED MATRIX MANAGEMENT
THERMAL DESORBER FOR GAS CHROMATOGRAPHY SAMPLE INTRODUCTION WITH IMPROVED COMPOUND RECOVERY AND ENHANCED MATRIX MANAGEMENT
展开▼
机译:改进的气相色谱回收率和增强的矩阵管理功能的气相色谱样品热解吸器
展开▼
页面导航
摘要
著录项
相似文献
摘要
A system to thermally desorb a sample into a multi-column GC or GCMS system that can use both the desorption system and GC system for optimizing injection rates, matrix management (e.g., water elimination), optimizing recovery of a specific range of chemicals, and system cleanup is described. Reversing the flow through a first column inside the GC can facilitate the elimination of excess, condensed water as well as heavy chemicals that could otherwise affect the operation and background of the GC. The elimination of flow through both the thermal desorber and a first column in the GC during sample preheat can accommodate the pre-expansion of the sample that could otherwise result in pre-release to the active carrier gas flow in other systems. Transfer lines and rotary valves can be avoided, improving system performance and longevity, with simple maintenance achieved by replacing a desorption liner and the first GC column.
展开▼