Alpha-Cyclodextrin Composite for LC-MS Matrix Effect Reduction
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Solution Overview
Problem
Analytical testing methods like LC/MS-MS face significant errors due to matrix effects from contaminants such as phospholipids, leading to reduced precision, selectivity, and sensitivity, and existing methods for removing these contaminants are inefficient, causing analyte losses and instrument downtime.
Innovation Solution
A matrix-reducing composition comprising α-cyclodextrin and its co-polymer, which forms a complex with matrix-interfering agents, allowing for their separation and reducing their impact on analyte detection, using a system that includes containers with the composition and a porous membrane for filtering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional methods (LLE, PPT, SPE) are used to remove contaminants, then matrix effects are reduced, but analyte losses occur and instrument downtime increases
Solution Approach 1:
The invention uses a composite material consisting of cyclodextrin combined with magnetic particles. The cyclodextrin component selectively binds to matrix-interfering agents through host-guest inclusion complexes, while the magnetic particles enable easy separation and recovery. This composite structure achieves effective contaminant removal without analyte loss, resolving the contradiction between reducing matrix effects and maintaining analyte detection accuracy.
2Object-affected harmful factors
If conventional methods are used to remove phospholipids, then ion suppression is reduced, but extensive solvent washing is required causing instrument downtime
Solution Approach 1:
The invention replaces the conventional mechanical/chemical separation methods (extensive solvent washing, centrifugation, filtration) with a magnetic field-based separation system. The magnetic particles in the composite material respond to an external magnetic field, enabling rapid and easy separation of the cyclodextrin-phospholipid complexes from the analyte solution. This eliminates time-consuming washing steps while effectively reducing ion suppression.
3Object-affected harmful factors
If cyclodextrin is used to bind matrix-interfering agents, then matrix effects are reduced, but separation and recovery of the complex becomes difficult
Solution Approach 1:
The invention introduces magnetic particles as an intermediary carrier for the cyclodextrin. These magnetic particles serve as a bridge between the cyclodextrin binding function and the separation process. The magnetic particles enable the cyclodextrin-phospholipid complexes to be easily manipulated, separated, and recovered using magnetic fields, making the process simple and efficient.
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 composition effectively reduces matrix effects, maintaining analyte sensitivity and reducing downtime by efficiently removing interfering agents, ensuring accurate analyte detection and quantitation.
Implementation Method 1
A matrix-reducing composition comprising α-cyclodextrin and its co-polymer, which forms a complex with matrix-interfering agents
Implementation Method 2
using a system that includes containers with the composition and a porous membrane for filtering
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
Aspects of the present disclosure include a system for analytical sample preparation. In some embodiments, the system includes a container having disposed therein an analytical sample treatment composition including α-cyclodextrin and/or an α-cyclodextrin co-polymer. Also provided is a method of reducing matrix effects in an analytical sample. In some embodiments, the method includes: contacting a sample including a matrix-interfering agent and an analyte with a cyclodextrin composition to produce a matrix-cyclodextrin complex, wherein the cyclodextrin composition comprises an α-cyclodextrin and/or an α-cyclodextrin co-polymer; separating the complex from the contacted sample to produce a matrix-reduced composition; and detecting the analyte in the matrix-reduced composition. Kits and compositions for use in the subject systems and methods are also provided.