Chromatograph Inlet Liner Projections for Involatile Trapping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Inlet liners for chromatograph systems face challenges in trapping involatile materials without decomposing analytes or requiring frequent cleaning or replacement, as existing designs either adsorb or decompose compounds on glass wool surfaces or allow sample interaction with active inlet sites.
Innovation Solution
An elongate tube inlet liner with projections extending from the inner bore surface into the bore, configured to trap involatile materials by adhering them to the projection surfaces, preventing decomposition and fouling of the chromatograph column, while allowing sample flow to the column without obstruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a glass wool plug is used to trap involatile materials, then involatile materials are trapped, but analytes decompose due to irreversible adsorption or chemical decomposition on the glass wool surface
Solution Approach 1:
The patent removes the glass wool plug entirely from the inlet liner design. Instead, it uses a helical baffle structure that traps involatile materials through physical obstruction of the flow path without requiring adsorptive materials, thereby eliminating analyte decomposition while maintaining trapping functionality.
Solution Approach 2:
The patent introduces a helical baffle as an intermediary structure between the sample flow and the inlet. This baffle creates a helical path that mediates the separation of involatile materials from analytes through flow dynamics rather than direct contact with adsorptive surfaces.
2Object-affected harmful factors
If no glass wool is used in the inlet liner, then analyte decomposition is avoided, but involatile materials are not trapped and can enter the column
Solution Approach 1:
The helical baffle acts as an intermediary structure that enables trapping of involatile materials without requiring glass wool. The baffle creates a helical flow path that causes involatile materials to condense and adhere to the baffle surfaces, preventing them from reaching the column while maintaining a clean surface that does not decompose analytes.
Solution Approach 2:
The patent employs the inner bore surface of the inlet liner and the helical baffle surfaces as trapping surfaces. These surfaces provide adequate surface area for involatile material condensation and adhesion without requiring porous glass wool, thereby achieving trapping functionality with a smooth, non-decomposing surface.
3Reliability
If a helical path is used for sample flow, then involatile materials are trapped at the inlet, but these trapped materials act as adsorptive traps for remaining analytes requiring frequent replacement
Solution Approach 1:
The patent extracts the problematic element of direct involatile material contact with the inlet liner walls by introducing a helical baffle structure. The involatile materials are trapped on the baffle surfaces rather than adhering to the main liner, and can be more easily removed or do not interfere with analyte flow, thereby extending liner service life.
Solution Approach 2:
The patent segments the inlet liner into distinct functional zones: a helical section with baffles for trapping involatile materials, and a smooth outlet section for clean analyte flow to the column. This segmentation prevents trapped materials from interfering with the analytical portion of the liner, extending its usable life.
4Productivity
If the inlet liner allows sample to leave and interact with active sites, then flow is not blocked, but analytes decompose due to interaction with active sites
Solution Approach 1:
The patent applies preliminary action by trapping and removing involatile materials and deactivating potential active sites within the inlet liner structure itself, before the sample reaches the column. The helical baffle structure and surface treatments prepare the flow path in advance to prevent analyte decomposition, ensuring clean samples enter the column without requiring frequent liner replacement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively traps involatile materials, reducing the need for frequent cleaning or replacement of inlet liners and maintaining operational efficiency by preventing analyte decomposition and column fouling.
Implementation Method 1
the projection surfaces, preventing decomposition and fouling of the chromatograph column
Data Source
AI summary
An inlet liner is provided for use in an inlet assembly of a chromatograph system. The inlet liner has an elongate tube that extends along a longitudinal axis and defines a bore that extends along the longitudinal axis and has an inner bore surface. At least one projection extends from the inner bore surface into the bore. Chromatograph systems are provided including the exemplary inlet liner(s). Methods are also provided for analyzing a sample containing a matrix in a chromatograph system having an inlet assembly connected to a chromatograph column. The method includes positioning an exemplary inlet liner in the inlet assembly, flowing the sample through the inlet liner, and adhering a portion of the matrix to a projection surface of at least one projection of the inlet liner.