NanoESI Mass Spectrometry Analyte Detection
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Solution Overview
Problem
Current mass spectrometry techniques face challenges in achieving sensitive detection of analytes from complex biological matrices, particularly due to matrix effects and low abundance of analytes, which limits detection sensitivity and requires high sample concentration, complicating high-throughput analysis.
Innovation Solution
A method involving pretreatment, derivatization, and dilution of samples followed by nanoESI mass spectrometry, using specific compounds to form covalent bonds with analytes and solvents for improved ionization and reduced matrix interference, allowing for sensitive detection without the need for extensive sample concentration or chromatographic separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If normal flow ESI is used with HPLC separation, then chromatographic separation is achieved, but ion yield is reduced due to matrix effects
Solution Approach 1:
The patent introduces an intermediary step (sample pretreatment and derivatization) between the complex biological matrix and the mass spectrometry analysis. This intermediary processing transforms the analytes into forms that are less susceptible to matrix effects while maintaining separability, thus resolving the contradiction between achieving separation and maintaining ion yield.
Solution Approach 2:
The patent changes the physical and chemical parameters of the sample through pretreatment and derivatization processes. By modifying the analyte structure and sample composition before analysis, the method alters the interaction between analytes and matrix components, thereby improving ion yield while preserving chromatographic separation capabilities.
2Measurement precision
If sample concentration is increased to improve detection sensitivity, then detection limits are improved, but analysis complexity and time increase
Solution Approach 1:
The patent performs preliminary actions (pretreatment and derivatization) on the sample before analysis to enhance analyte detectability. By preparing the sample in advance with these modification steps, the method achieves high detection sensitivity without requiring extensive sample concentration or repeated analyses, thus maintaining high throughput.
3Measurement precision
If derivatization reactions are used to improve detection limits, then sensitivity increases, but ionization is interfered with by auxiliary reagents
Solution Approach 1:
The patent carefully controls the parameters of the derivatization process, including reagent selection, concentration, and reaction conditions. By optimizing these parameters, the method achieves sufficient derivatization for enhanced sensitivity while minimizing the excess reagent concentration that would interfere with ionization, thus resolving the contradiction between detection limits and ionization efficiency.
4Reliability
If nano-ESI sources are used to improve ion yields, then sensitivity increases, but sample volume is limited
Solution Approach 1:
The patent performs preliminary enrichment and concentration of the analyte in the sample matrix before nano-ESI analysis. By pre-concentrating the analyte of interest while removing or reducing matrix components, the method ensures sufficient analyte quantity for nano-ESI's low sample volume requirements while maintaining high ion yield and sensitivity.
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 approach enhances detection sensitivity and reduces matrix interference, enabling accurate and efficient analysis of low-concentration analytes like steroids in biological samples, improving signal-to-noise ratio and detection limits without the complexity of HPLC separation, thus facilitating high-throughput analysis.
Implementation Method 1
Derivatizing the analyte of interest, preferably in the pretreated sample
Implementation Method 2
Determining the level of the analyte of interest in the pretreated sample using nanoESI mass spectrometry
Data Source
AI summary
The present invention relates to a method, a diagnostic system, a kit and the use thereof for efficiently detection of an analyte of interest by nanoESI mass spectrometry.