Echo MS Analyte Screening With Single-Tube Calibration
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Solution Overview
Problem
Current methods for screening and quantifying target analytes in samples, such as immunoassays and liquid chromatography mass spectrometry, are slow, cumbersome, and lack specificity, often resulting in cross-reactivity with non-target substances in complex samples, necessitating the development of alternative systems for rapid and accurate high-throughput analysis.
Innovation Solution
The method involves providing a sample in a sample reservoir, ejecting it into a sampling interface using an acoustic droplet ejector, and performing mass spectrometry to detect and quantify target analytes, potentially with calibration standards and internal standards, and may include solid phase microextraction and differential ion mobility separation to enhance specificity and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If immunoassays and liquid chromatography mass spectrometry are combined for screening and quantification, then sensitivity and specificity are improved, but analysis time and operational complexity increase significantly
Solution Approach 1:
The patent combines the screening and quantification functions into a single mass spectrometry-based workflow, eliminating the need for separate immunoassay and LC-MS steps. The acoustic droplet ejection system directly introduces samples into the mass spectrometer for both detection and quantification in one continuous process, resolving the time loss caused by sequential multi-technique analysis.
Solution Approach 2:
The mass spectrometer is configured to perform multiple functions: initial screening for target analytes, identification of specific compounds through mass-to-charge ratio analysis, and quantification using calibration curves. This multi-functional approach replaces the need for separate specialized techniques while maintaining detection accuracy.
2Measurement precision
If traditional multi-step sample preparation and analysis methods are used, then comprehensive analyte characterization is achieved, but device complexity and resource requirements increase
Solution Approach 1:
The patent extracts only the essential analytical function from complex preparation systems. By using acoustic droplet ejection to directly introduce prepared samples into the mass spectrometer without intermediate chromatography columns or multiple transfer steps, the system eliminates unnecessary device complexity while preserving the core capability of analyte characterization through mass spectrometric analysis.
Solution Approach 2:
The patent replaces mechanical chromatography separation systems with acoustic field-based droplet ejection and manipulation. The acoustic droplet ejection system uses sound waves to precisely control sample introduction, replacing complex mechanical pumping, valve switching, and column flow systems, thereby reducing device complexity while maintaining analytical precision.
3Measurement precision
If extensive sample preparation and multiple calibration standards are used, then quantification accuracy is improved, but the number of reagents and operational steps increase
Solution Approach 1:
A single calibration standard solution serves multiple purposes: it establishes the calibration curve for quantification, validates the mass spectrometer response, and provides a reference for detecting unknown analytes. This multi-functional use of calibration standards reduces reagent consumption while maintaining quantification accuracy through rigorous calibration procedures.
Solution Approach 2:
The system uses internal calibration and self-validation mechanisms where the calibration standards and quality control samples serve to automatically verify system performance and correct for variations. This self-service approach reduces the need for extensive external validation and additional reagents while maintaining measurement precision.
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 enables rapid, sensitive, and specific detection and quantification of target analytes, reducing analysis time from minutes to seconds, minimizing errors, and reducing the need for extensive sample preparation and reagents, while improving the limit of quantitation compared to existing methods.
Implementation Method 1
ejecting it into a sampling interface using an acoustic droplet ejector
Implementation Method 2
ionizing the at least one sample; and detecting by a first analysis by mass spectrometry the presence of ions of the target analyte
Data Source
AI summary
Disclosed are methods for detecting and quantifying target analytes in a sample by mass analysis that include detecting the presence of ions of the target analyte in the sample and quantifying the amount of the target analyte. The methods can include one or more standards (e.g., internal and/or external standards) that may be labelled (e.g., isotopically labelled).