Mass Spectrometry Reagent with Permanent Charge for Sensitivity
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Solution Overview
Problem
Current mass spectrometry techniques face challenges in sensitivity, particularly for analyzing low-abundance analytes from complex biological matrices, due to inefficiencies in derivatization reagents that lead to insufficient labeling, structural isomer generation, and suboptimal ionization and fragmentation behaviors.
Innovation Solution
Development of a novel compound with a permanent charge capable of covalently binding to analytes, allowing for enhanced sensitivity through improved fragmentation behavior and MS signal enhancement, forming daughter ions with specific mass-to-charge ratios for precise detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If derivatization reagents are used to improve sensitivity of MS analysis, then detection sensitivity is improved, but labeling efficiency is insufficient and structural isomers are generated
Solution Approach 1:
The patent changes the chemical parameters of the derivatization reagent by incorporating a permanent charge (quaternary ammonium or sulfonium group) and specific functional groups (hydrazine, hydroxylamine, thiol, amine) that enable more efficient and specific labeling reactions, thereby improving both detection sensitivity and labeling efficiency simultaneously
Solution Approach 2:
The derivatization reagent combines multiple functional groups within a single molecular structure: a permanent charge carrier (quaternary ammonium or sulfonium), a reactive functional group for covalent bonding, and optional chromatographic separation groups. This composite structure enables simultaneous achievement of efficient labeling, isomer prevention, and improved detection sensitivity
2Measurement precision
If derivatization reagents with permanent charge are used to improve ionization efficiency, then ionization efficiency is improved, but fragmentation behavior becomes suboptimal due to many fragmentation pathways
Solution Approach 1:
The patent applies local quality by positioning the permanent charge (quaternary ammonium or sulfonium) at a specific location within the reagent molecule, away from the analyte binding site. This localized charge placement ensures efficient ionization while the rest of the molecule structure is designed to minimize unwanted fragmentation pathways, creating distinct and simplified fragmentation patterns
3Measurement precision
If derivatization reagents are used to enhance detection sensitivity, then sensitivity is improved, but chromatographic separation performance deteriorates
Solution Approach 1:
The derivatization reagent is designed with multi-functionality: it contains a permanent charge for ionization, a reactive functional group for covalent bonding to the analyte, and optional chromatographic separation groups that improve peak shape and retention. This universal design enables the single reagent to simultaneously achieve sensitive detection, efficient labeling, and improved chromatographic separation across different analyte types
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 novel compound significantly enhances the sensitivity and efficiency of mass spectrometric detection of analytes, enabling more accurate and reliable analysis of low-abundance molecules by altering fragmentation pathways and maintaining molecular information post-fragmentation.
Implementation Method 1
said compound is capable of covalently binding to the analyte
Implementation Method 2
which makes it capable to being already ionized and therefore circumvent the ionization step within an ion source
Implementation Method 3
said compound is capable of forming at least one daughter ion having a mass m2
Data Source
AI summary
The present invention relates to compounds which are suitable to be used in mass spectrometry as well as methods of mass spectrometric determination of analyte molecules using said compounds.