Fentanyl Test Strip Layout for Low-Concentration Saliva Detection
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Solution Overview
Problem
Existing fentanyl detection methods, such as urine and saliva test strips, have low sensitivity and detection thresholds of 20 ng/mL, failing to detect lower concentrations effectively.
Innovation Solution
A rapid test system comprising a base layer, sample pad, first and second conjugate pads, reaction pad, and absorption pad, utilizing gold conjugated fentanyl antibodies and trithiocyanuric acid complexes to enhance detection sensitivity and signal intensity, allowing detection down to 10 ng/mL.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional fentanyl test strips are used, then the test is simple and rapid, but the detection sensitivity is low with a threshold of 20 ng/mL
Solution Approach 1:
The test system is divided into multiple functional pads (sample pad, first conjugate pad, second conjugate pad, reaction pad, absorption pad) arranged in sequence. Each pad performs a specific function in the detection process, allowing the system to achieve high sensitivity through segmented functional distribution while maintaining operational simplicity through automated capillary flow
Solution Approach 2:
Gold conjugated fentanyl antibody complexes and gold conjugated trithiocyanuric acid complexes serve as intermediary elements that mediate between the fentanyl analyte and the detection signal. These intermediary complexes enable the system to detect low concentrations of fentanyl by providing amplified signal transmission through the capillary flow path
2Illumination intensity
If conventional test strips are used, then the device is simple, but the detection signal intensity is weak
Solution Approach 1:
The system changes the parameters of the detection complexes by using gold conjugated fentanyl antibody complexes and gold conjugated trithiocyanuric acid complexes with specific molecular weights and surface areas. This parameter optimization enhances the signal intensity produced during capillary flow while maintaining the simplicity of the test strip structure
Solution Approach 2:
The conjugate pads utilize composite material structures combining gold particles with fentanyl antibodies and trithiocyanuric acid. This composite approach amplifies the detection signal through synergistic effects of the different materials while keeping the overall device structure simple and maintaining capillary flow characteristics
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 system provides high-intensity detection signals and high sensitivity, effectively detecting low concentrations of fentanyl in saliva with reduced false negatives and positives.
Implementation Method 1
The first conjugate pad includes a plurality of gold conjugated fentanyl antibody complexes, and the plurality of gold conjugated fentanyl antibody complexes are configured to bind with fentanyl
Implementation Method 2
The second conjugate pad includes a plurality of gold conjugated trithiocyanuric acid complexes
Implementation Method 3
the sample pad, the first conjugate pad, the second conjugate pad, the reaction pad and the absorption pad are sequentially arranged above the base layer along a first direction
Data Source
AI summary
A rapid test system for detecting fentanyl concentration is provided, the rapid test system includes a base layer, a sample pad, a first conjugate pad, a second conjugate pad, a reaction pad and an absorption pad, the sample pad, the first conjugate pad, the second conjugate pad, the reaction pad and the absorption pad are sequentially arranged above the base layer along a first direction, the first conjugate pad includes a plurality of gold conjugated fentanyl antibody complexes, the second conjugate pad includes a plurality of gold conjugated trithiocyanuric acid complexes, and the plurality of gold conjugated fentanyl antibody complexes are configured to bind with fentanyl.