Electrochemical Opioid Detection With Internal Standard Quantification
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Solution Overview
Problem
Existing drug testing methods are inadequate for rapidly and accurately detecting and quantifying fentanyl and other opioids in unknown samples, often requiring expensive equipment and providing insufficient safety assessments due to the variability in substance concentrations, which can lead to unintentional overdoses and delayed treatment.
Innovation Solution
A portable, electrochemical apparatus using cyclic voltammetry and a separation process with an internal standard, such as methyl vanillate, for rapid detection and quantification of opioids, allowing for precise dosage calculations based on electrochemical signatures and adsorption onto electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If LCMS is used to identify and quantify opioid concentrations in patients, then measurement precision is improved, but loss of time increases due to laboratory processing delays
Solution Approach 1:
The patent extracts the detection function from centralized laboratory LCMS systems and implements it in portable field devices using electrochemical sensors. This extraction enables on-site opioid concentration measurement, eliminating the time loss associated with transporting samples to laboratories while maintaining sufficient measurement precision for clinical decision-making.
Solution Approach 2:
The patent replaces the complex mechanical LCMS system with an electrochemical detection system. This substitution uses electrochemical principles (measuring current, voltage, or impedance changes) instead of mass spectrometry, enabling portable, rapid opioid detection without sacrificing measurement accuracy for clinical applications.
2Difficulty of detecting and measuring
If existing drug testing methods are used to detect fentanyl presence, then detection capability is provided, but measurement precision deteriorates due to inability to quantify concentration
Solution Approach 1:
The patent implements quantitative measurement capabilities that provide feedback on exact opioid concentrations rather than simple presence/absence detection. The electrochemical sensors measure concentration levels and provide this information back to clinicians, enabling informed decisions about treatment dosing and patient safety assessments.
Solution Approach 2:
The patent changes the detection parameter from qualitative (presence/absence) to quantitative (concentration measurement). By measuring electrochemical parameters such as current or voltage that correlate with opioid concentration, the system provides precise quantification that enables clinical decision-making while maintaining portability.
3Loss of time
If portable electrochemical apparatus is used for rapid opioid detection, then loss of time is reduced, but measurement precision may deteriorate compared to LCMS
Solution Approach 1:
The patent applies partial action by implementing electrochemical detection that provides sufficient measurement precision for clinical decision-making without achieving the absolute precision of laboratory LCMS. This partial precision is adequate for determining treatment dosing and patient safety, enabling rapid field detection while meeting clinical needs.
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
Enables rapid, accurate detection and quantification of opioids in samples, facilitating timely treatment dosages and safety assessments with cost-effective, portable equipment.
Implementation Method 1
The analytes of interest are separated from one another by a separation process
Implementation Method 2
an electrochemical detector that detects the analytes of interest based on electrochemical signatures
Implementation Method 3
adsorption onto electrodes
Data Source
AI summary
Methods and apparatuses for rapid detection and quantification of analytes are disclosed. The analytes may be opioids such as fentanyl. The method includes the use of an internal standard. The internal standard is introduced into the unknown sample. The method may involve a separation step prior to an electrochemical detection step. In some embodiments, the separation step is omitted. The analyte may be selectively adsorbed onto a surface of an electrode by maintaining a potential on the electrode during which a solution containing the dissolved analyte flows through the electrode. Performing electroanalysis on the analyte-adsorbed electrode detects and quantifies only the adsorbed analyte. In some embodiments, the internal standard is methyl vanillate.