Vitamin D Blood Detection Using LDI-MS Without Matrix Interference
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Solution Overview
Problem
Current methods for detecting vitamin D in blood are cumbersome, time-consuming, and lack sensitivity and high-throughput capabilities, making real-time analysis and large-scale sample processing difficult, which hinders immediate disease diagnosis and drug treatment response.
Innovation Solution
The use of laser desorption/ionization mass spectrometry (LDI-MS) with a tungsten ditelluride nanoflake layer for sample loading, allowing for direct, precise, and high-throughput detection of vitamin D in blood without matrix interference, enabling real-time analysis and accurate quantitative measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If liquid chromatography tandem mass spectrometry (LC-MS/MS) is used for vitamin D detection, then measurement accuracy is improved, but analysis time increases and productivity decreases
Solution Approach 1:
The invention extracts and eliminates the time-consuming liquid chromatography separation step from the traditional LC-MS/MS workflow. By using LDI-MS with tungsten ditelluride nanoflakes, the method directly ionizes vitamin D molecules from blood samples without requiring complex chromatographic separation, thereby maintaining measurement accuracy while dramatically reducing analysis time and increasing throughput.
Solution Approach 2:
The invention replaces the mechanical chromatographic separation system with a laser-based ionization system. Instead of using liquid flow and physical separation columns, the method employs laser desorption/ionization to directly ionize vitamin D molecules, substituting a complex mechanical separation process with a more efficient optical ionization approach that achieves both high accuracy and high throughput.
2Reliability
If multiple experimental steps are used in traditional methods, then measurement reliability is improved, but device complexity and ease of operation worsen
Solution Approach 1:
The invention merges multiple separate experimental steps (sample preparation, chromatographic separation, and mass spectrometry detection) into a single integrated LDI-MS measurement process. The tungsten ditelluride nanoflake-coated substrate performs both sample loading and ionization functions, eliminating the need for separate chromatography columns and reducing the overall number of operational steps while maintaining measurement reliability.
Solution Approach 2:
The tungsten ditelluride nanoflake layer serves multiple functions simultaneously: it acts as a sample loading substrate, a ionization catalyst, and a signal enhancement agent. This multi-functional component replaces multiple separate devices and steps, simplifying the overall system while maintaining or improving measurement reliability through the synergistic effects of the nanoflakes.
3Measurement precision
If traditional methods are used for vitamin D detection, then comprehensive analysis is achieved, but real-time detection capability is lost
Solution Approach 1:
The invention performs preliminary action by pre-coating the substrate with tungsten ditelluride nanoflakes, which are specifically designed to enhance ionization efficiency for vitamin D molecules. This pre-preparation eliminates the need for time-consuming sample processing steps during actual measurement, enabling rapid real-time detection while maintaining high precision through the optimized nanoflake surface.
Solution Approach 2:
The invention skips the time-consuming intermediate steps of liquid chromatography separation and extensive sample preparation by directly introducing blood samples onto the LDI-MS substrate. The method rushes through the analysis process by utilizing the unique ionization properties of tungsten ditelluride nanoflakes to directly detect vitamin D molecules in real-time, achieving both speed and accuracy.
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 simplifies the measurement process, significantly reduces analysis time, enhances sensitivity and precision, and allows for the simultaneous detection of various vitamin D subtypes and metabolic analysis, providing immediate and accurate results even at low concentrations.
Implementation Method 1
laser desorption/ionization mass spectrometry (LDI-MS)
Data Source
AI summary
A method of detecting vitamin D in blood using laser desorption/ionization mass spectrometry (LDI-MS) and an apparatus therefor according to the present invention are not complicated in a measurement, do not require a number of measurement steps, and allow for easy measurement and collection of results in real time with a quick analysis. In addition, precise analysis may be performed even at a lower concentration of a sample, such that sensitivity and precision are excellent, various subtypes of vitamin D may be simultaneously detected, a throughput is high, and structural analysis and quantitative analysis of vitamin D that has undergone a metabolic process in blood may be accurately performed without a matrix interference.