Fast Gas Chromatograph Column Insertion via Ultrasonic Vibration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fast gas chromatography systems face limitations such as increased friction during column insertion, risk of capillary column breakage, and restricted column length due to the design of the resistively heated metal tube, which impede efficient analysis and flexibility in separation capabilities.
Innovation Solution
The system employs a resistively heated metal tube with an internal diameter over twice the external diameter of the capillary column, allowing multiple loops of the column to be inserted and using an ultrasonic vibrating device to reduce friction during insertion, enabling flexible column length and safe replacement without altering the heated metal tube's dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the heated metal tube length is increased to accommodate longer capillary columns, then separation capability is improved, but friction during column insertion increases and column breakage risk increases
Solution Approach 1:
The patent applies ultrasonic vibration to the metal tube during column insertion to reduce friction between the capillary column and the tube interior surface. The ultrasonic vibrations create a lubricating effect that allows the column to be inserted smoothly without excessive friction, enabling longer column lengths without increasing insertion difficulty or breakage risk
2Speed
If the heated metal tube internal diameter is reduced to minimize thermal mass, then heating speed is improved, but friction during column insertion increases
Solution Approach 1:
Ultrasonic vibration is applied to the metal tube during column insertion to overcome the increased friction that results from the narrow internal diameter. This allows the use of thin-walled, low-mass metal tubes that can be heated quickly while still permitting easy column insertion without excessive friction or breakage
3Length of moving object
If the heated metal tube length is increased to allow longer column insertion, then column length flexibility is improved, but power supply requirements and device size increase
Solution Approach 1:
By using ultrasonic vibration to reduce friction, the patent enables the use of longer metal tubes without proportionally increasing power requirements. The reduced friction allows for smoother insertion of longer columns, and the ultrasonic effect itself is generated by a small piezoelectric transducer that adds minimal complexity to the power supply system
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
This configuration enhances column durability, reduces analysis time, and increases separation efficiency by allowing longer column lengths and multiple column loops, while minimizing thermal mass and power consumption, thus enabling faster and more flexible gas chromatography analysis.
Implementation Method 1
resistively heated metal tube... resistively heating said heated metal tube in a time programmed manner
Implementation Method 2
using an ultrasonic vibrating device to reduce friction during insertion
Data Source
AI summary
A fast gas chromatograph (GC) method and device for obtaining fast gas chromatography analysis, in which a capillary gas chromatography column is inserted into a resistively heated metal tube located mostly outside a heated oven, which serves as a heated transferline to a flexible column that enters a resistively heated metal tube from a gas chromatograph injector and exits into a gas chromatograph detector. The resistively heated metal tube of the fast GC device has an internal diameter that is over twice the external diameter of the GC column so as to enable the insertion of several capillary GC column loops. The process of column insertion into or removal from the heated tube is aided by touching it with an ultrasound vibrating device that remarkably reduces the friction during column insertion into the metal tube heater.