Low-Interference Polyester Substrates for Fluorescence Spectroscopy
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Solution Overview
Problem
Fluorescence spectroscopy is hindered by interference from substrate fluorescence, leading to deviations in analyte concentration calculations due to high fluorescence absorption and emission, resulting in reduced sensitivity and precision.
Innovation Solution
A polyester composition with low fluorescence excitation and emission signals at specific wavelengths, combined with additives for oxidative degradation prevention, is used to minimize substrate interference and enhance sensitivity and precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional substrate is used in fluorescence spectroscopy, then the substrate provides structural support, but the substrate's fluorescence absorption and emission interfere with the analyte's fluorescence signal
Solution Approach 1:
The patent changes the optical parameters of the substrate by selecting a polyester composition with specific fluorescence characteristics - one that has minimal fluorescence absorption and emission in the wavelength range of interest (485 nm excitation, 535 nm emission). This parameter change in the substrate's optical properties eliminates the interference between substrate and analyte fluorescence signals, thereby improving measurement precision.
Solution Approach 2:
The patent uses a composite polyester composition that combines polyester base material with specific additives (antioxidants, UV stabilizers) in controlled amounts. This composite material approach allows optimization of the substrate's fluorescence properties while maintaining its structural support function, resolving the contradiction between providing support and avoiding optical interference.
2Measurement precision
If blank measurements are performed to correct substrate interference, then some interference can be compensated, but residual interference remains especially when substrate has high fluorescence absorption and emission
Solution Approach 1:
The patent extracts the harmful fluorescence property from the substrate by selecting a polyester composition that inherently lacks strong fluorescence absorption and emission characteristics. Instead of relying on blank measurements to compensate for interference, the substrate itself is designed to minimize interference from the outset, making blank measurements unnecessary and eliminating residual interference that would compromise reliability.
3Measurement precision
If a substrate with low fluorescence absorption and emission is used, then interference is minimized, but the substrate must be specifically selected or modified
Solution Approach 1:
The patent establishes specific parameter criteria for substrate selection - polyester composition with fluorescence excitation signal at 485 nm and/or emission signal at 535 nm below certain thresholds. By defining these quantitative parameters, the patent makes the substrate selection process systematic and reproducible, improving ease of manufacture while ensuring low interference for precise fluorescence measurements.
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 method achieves lower fluorescent background noise and improved detection threshold, resulting in more precise and sensitive fluorescence spectroscopy.
Implementation Method 1
a polyester composition having a relatively low fluorescence excitation signal at 485 nm and/or a relatively low fluorescence emission signal at 535 nm
Data Source
AI summary
The present disclosure relates to a fluorescence spectroscopic method and to several products that can be analyzed using this method, the fluorescence spectroscopic method comprising the following steps: a) implementing : - at least one product to be irradiated, comprising at least one substrate and, optionally, at least one analyte, - at least one light source for irradiating the product(s), - optionally, at least one optical filter; b) irradiating the product with the light source(s); c) assessing the fluorescence excitation and/or emission of the product, qualitatively and/or quantitatively, wherein the substrate and/or the optical filter, if present, comprise(s) a polyester composition having an excitation signal at 485 nm and/or an emission signal at 535 nm.