Enzyme-Linked Upconversion Fluorescence Ciprofloxacin Detection
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Solution Overview
Problem
Traditional methods for detecting ciprofloxacin in meat products are costly, time-consuming, and involve complex steps, making them unsuitable for rapid and high-sensitivity detection.
Innovation Solution
A method utilizing an enzyme-linked upconversion fluorescence and potassium titanium oxalate system, which involves mixing enzyme-linked upconversion nanoparticle solution with aptamer-bound magnetized polydopamine solution to create a fluorescence-ultraviolet dual-signal detection system, establishing standard curves, and calculating ciprofloxacin content based on signal characteristic values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional detection methods (high-performance liquid chromatography, liquid chromatography-tandem mass spectrometry) are used, then detection accuracy is improved, but detection cost and device complexity increase
Solution Approach 1:
The patent replaces expensive, complex instruments (HPLC, LC-MS/MS) with a disposable, simple enzymatic detection system using upconversion nanoparticles and aptamers. This system provides sufficient detection accuracy for food safety applications while eliminating the need for expensive chromatography and mass spectrometry equipment.
Solution Approach 2:
The patent transforms the detection approach by changing from instrument-based physical separation/detection to a biochemical signal amplification system. The upconversion nanoparticles provide enhanced fluorescence signals that can be detected with simple equipment, achieving accurate quantification without complex instrumentation.
2Measurement precision
If traditional detection methods are used, then detection accuracy is improved, but detection time increases
Solution Approach 1:
The patent employs pre-designed aptamer-nanoparticle conjugates that are ready for immediate use. The aptamers are pre-selected and conjugated to upconversion nanoparticles, eliminating the need for time-consuming sample preparation, chromatography separation, and instrument calibration required by traditional methods.
Solution Approach 2:
The patent skips the time-consuming intermediate steps of traditional chromatography methods by using direct binding between aptamers and ciprofloxacin targets. The enzymatic amplification and upconversion fluorescence provide rapid signal generation, reducing detection time from hours to minutes while maintaining accuracy.
3Measurement precision
If traditional detection methods are used, then detection accuracy is improved, but operational complexity increases
Solution Approach 1:
The patent creates a self-assembling detection system where aptamers automatically bind to ciprofloxacin targets and upconversion nanoparticles provide automatic signal amplification. The system requires minimal operator intervention, eliminating the complex sample preparation, instrument operation, and data analysis steps required by traditional methods.
Solution Approach 2:
The patent introduces aptamers as intermediary molecules that specifically recognize and bind to ciprofloxacin, and upconversion nanoparticles as signal intermediaries that amplify the detection signal. This intermediary system simplifies operation by providing a direct, intuitive readout without requiring complex instrumental procedures.
4Reliability
If traditional detection methods are used, then detection reliability is improved, but detection cost increases
Solution Approach 1:
The patent changes the detection paradigm from expensive instrument-based methods to a cost-effective biochemical assay using commercially available upconversion nanoparticles and aptamers. This approach maintains detection reliability through specific aptamer-target binding and signal amplification while reducing costs by eliminating expensive consumables and instrument maintenance.
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 method improves detection efficiency and sensitivity by using magnetized polydopamine for signal separation and quenching, and potassium titanium oxalate for colorimetric detection, allowing for accurate and rapid determination of ciprofloxacin in meat samples.
Implementation Method 1
enzyme-linked upconversion nanoparticle solution
Implementation Method 2
aptamer-bound magnetized polydopamine solution
Implementation Method 3
potassium titanium oxalate system
Implementation Method 4
colorimetric standard curve
Data Source
AI summary
A method for determining ciprofloxacin in a meat product based on an enzyme-linked upconversion fluorescence and potassium titanium oxalate system is provided. An enzyme-linked upconversion nanoparticle solution is mixed with an aptamer-bound magnetized polydopamine solution to obtain a fluorescence-ultraviolet dual-signal detection system. A fluorescence standard curve and a colorimetric standard curve for the ciprofloxacin content determination are created through the fluorescence-ultraviolet dual-signal detection system in combination with potassium titanium oxalate and hydrogen peroxide. A fluorescence intensity signal characteristic value and an ultraviolet absorbance signal characteristic value of a meat sample solution are determined. A ciprofloxacin content in the meat sample is calculated according to the fluorescence standard curve and the colorimetric standard curve.