Absorbance Cell Signal Conversion Using Reverse Dispersion Modeling

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Solution Overview

Problem

Converting long cell detection data to short cell equivalents in chromatography is challenging due to dispersion differences, leading to difficulties in maintaining the signal-to-noise ratio and chromatographic efficiency.

Innovation Solution

A method involving dispersion models and noise reduction filters is applied to transform long path cell signal data into shorter path cell signal data, using parameters derived from a dispersion model to account for differences between cell types, and applying these models in reverse to generate shorter path cell data, with optional noise reduction filters to improve signal quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a long path cell is used for absorbance detection, then the signal-to-noise ratio is improved, but dispersion increases leading to distorted chromatographic data

Engineering Contradiction:

Improvesignal-to-noise ratioVSAvoidchromatographic data accuracy

Core Design Contradiction:

Measurement precisionVSManufacturing precision

Solution Approach 1:

The invention extracts and removes the dispersion effect from the long path cell data through mathematical deconvolution. By treating dispersion as a separable factor that can be modeled and removed, the method isolates the true chromatographic signal from the distorting dispersion effects, thereby resolving the contradiction between maintaining high signal-to-noise ratio and preserving chromatographic data accuracy

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention changes the parameter of optical path length virtually through mathematical transformation rather than physically. By applying deconvolution algorithms, the method transforms long path cell data into equivalent short path cell data, allowing the system to maintain the high signal-to-noise ratio of long path cells while achieving the low dispersion characteristics of short path cells

Inventive Principle:

Principle #35Parameter changes

2Manufacturing precision

If a short path cell is used for absorbance detection, then dispersion is reduced improving chromatographic efficiency, but the signal-to-noise ratio decreases

Engineering Contradiction:

Improvechromatographic efficiencyVSAvoidsignal-to-noise ratio

Core Design Contradiction:

Manufacturing precisionVSMeasurement precision

Solution Approach 1:

The invention creates a virtual copy of short path cell data from long path cell measurements. Through deconvolution, the method generates chromatographic data that represents what would be observed in a short path cell, copying the low-dispersion characteristics while utilizing the high signal-to-noise ratio data from the long path cell

Inventive Principle:

Principle #26Copying

Solution Approach 2:

The invention introduces mathematical deconvolution as an intermediary process between long path cell measurement and short path cell equivalent data. This intermediary transformation allows the system to bridge the gap between the high signal-to-noise ratio of long path cells and the low dispersion of short path cells

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of operation

If long cell data is converted to short cell equivalents without dispersion correction, then the conversion is simple, but the converted data is inaccurate due to uncorrected dispersion differences

Engineering Contradiction:

Improvedata conversion simplicityVSAvoidconverted data accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The invention performs preliminary dispersion correction by determining the dispersion function beforehand through calibration experiments. By pre-characterizing the dispersion behavior of the specific detector cell, the method prepares the necessary correction parameters in advance, making the subsequent conversion process both accurate and relatively simple

Inventive Principle:

Principle #10Preliminary action

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 method effectively converts long path cell data to short path cell data while maintaining or improving the signal-to-noise ratio and chromatographic efficiency, allowing for accurate representation of chromatographic separation data across different cell lengths.

Implementation Method 1

converting long cell detection data to short cell equivalents has proven to be challenging due to dispersion differences between a long cell and a short cell

Methodology Applied

Scientific EffectDispersion: Dispersion (of waves)

Implementation Method 2

UV-VIS absorbance detectors (ADs) being the ubiquitous sensors of choice

Methodology Applied

Scientific EffectAbsorbance detection: Absorption Spectroscopy

Data Source

PatentUS12553871B2Conversion of long cell data to short cell equivalent

Publication Date: 2026.02.17 BOARD OF RGT THE UNIV OF TEXAS SYST

AI summary

A method of converting longer path cell signal data to shorter path cell signal data comprising: obtaining a longer path absorbance signal tracing and a shorter path absorbance signal tracing for at least one analyte band under the same conditions; obtaining an approximate superimposable match between the longer path absorbance signal tracing and the shorter path absorbance signal tracing using an amplitude scaling factor and one or more parameters derived from a dispersion model that accounts for dispersion differences between a short cell and a long cell; and applying the dispersion model in reverse using the derived parameters to future longer path absorbance signal traces from the longer path cell signal data to generate the shorter path cell signal data.