Polymeric MALDI Layer for High-Resolution Broad-Mass Imaging
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Solution Overview
Problem
Current MALDI MSI systems face challenges in accurately measuring small molecule metabolites and proteins due to limitations in matrix materials, which result in low spatial resolution and inability to detect low-mass analytes, and require complex and time-consuming sample preparation procedures.
Innovation Solution
A prefabricated polymeric layer is used in MALDI systems, combining matrix, charge dissipating, and sample holder functions, made from polymeric materials that promote efficient desorption and ionization of analytes across a wide mass range, allowing for high-resolution measurements and simplified sample preparation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional matrix materials are used in MALDI MSI systems, then the system can perform basic mass spectrometry imaging, but the spatial resolution is low and the ability to detect low-mass analytes is limited
Solution Approach 1:
The patent combines the matrix material and charge dissipating layer into a single integrated polymeric layer. This merging eliminates the need for separate layers, simplifying the sample preparation process while maintaining both the mass spectrometry imaging capability and the charge dissipation function, thereby improving spatial resolution without increasing device complexity
Solution Approach 2:
The polymeric layer serves multiple functions simultaneously: it acts as the matrix material for ionization, as a charge dissipating layer to prevent charge accumulation, and as a sample holder substrate. This multi-functionality reduces the number of components needed and simplifies the overall system structure, enabling high-resolution imaging while detecting both low-mass and high-mass analytes
2Adaptability or versatility
If traditional matrix materials are used, then basic analyte detection is possible, but accurate measurement of both low-mass metabolites and high-mass proteins is not achieved
Solution Approach 1:
By merging the matrix and charge dissipating functions into one polymeric layer, the patent eliminates multiple preparation steps. This single-layer structure enables accurate detection across the full mass range from low-mass metabolites to high-mass proteins while significantly reducing the time required for sample preparation
Solution Approach 2:
The patent uses polymeric materials with specific physical and chemical parameters that enable broad mass range detection. The polymer's molecular weight, functional groups, and physical state are optimized to facilitate ionization of both low-mass and high-mass analytes, expanding the detection capability without adding preparation complexity
3Reliability
If a charge dissipating layer is added to prevent charge accumulation, then ionization efficiency is improved, but the system complexity and sample preparation time increase
Solution Approach 1:
The patent merges the charge dissipating layer with the matrix layer into a single polymeric structure. This integration maintains the charge dissipation function to prevent charge accumulation and improve ionization efficiency, while eliminating the need for a separate charge dissipating layer, thereby reducing system complexity
Solution Approach 2:
The polymeric layer is designed to perform multiple functions simultaneously: it provides the matrix function for analyte co-crystallization and ionization, while also serving as the charge dissipating layer. This multi-functionality ensures reliable ionization across multiple laser shots without requiring additional layers or components
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 polymeric layer enables accurate measurement of both low- and high-mass analytes with improved spatial resolution and reduced sample preparation time, enhancing the capability to detect small molecule metabolites and proteins, and facilitating easier use of MALDI systems.
Implementation Method 1
A laser device (e.g., UV lasers such as nitrogen lasers having a wavelength of 337 nm) applies a laser beam (112) to the target material and the matrix. Because the matrix (106) is made of a laser energy absorbing material, parts of the matrix and the target material are undergoing ablation and desorption
Implementation Method 2
Large clusters (122) of the matrix and target material undergo ionization in an ionization zone (124) in the hot plume of the ablated gases molecules
Data Source
AI summary
A prefabricated polymeric layer to be used in a matrix-assisted laser desorption/ionization (MALDI) based system, the prefabricated polymeric layer including a first sublayer; and a second sublayer attached to the first sublayer, wherein the second sublayer includes a sample holder. At least one of the first sublayer and the second first sublayer includes a polymeric material, and the prefabricated polymeric layer is to be added to a target material to be examined by the MALDI system.