Poly(diacetylene) sensor arrays for characterizing aqueous solutions

A technology of sensor arrays and polydiacetylene, applied in instruments, scientific instruments, and analysis using chemical indicators, can solve complex labor intensity and other problems

Inactive Publication Date: 2020-10-20
AARHUS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Today's dominant protocols are still quite complex and labor-intensive, centered on gas chromatography and / or sensing panels

Method used

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  • Poly(diacetylene) sensor arrays for characterizing aqueous solutions
  • Poly(diacetylene) sensor arrays for characterizing aqueous solutions
  • Poly(diacetylene) sensor arrays for characterizing aqueous solutions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0300] Example 1 - Sensor stability when exposed to ambient environment

[0301] Paper-based PDA sensors were fabricated from 1 mM H, P, and T and their mixtures (H / T, P / H, and T / P, all 1:1 by volume). To characterize the stability of the paper-based PDA sensors, i.e. their propensity to change color in the absence of any specific stimulus, they were exposed to the environment for between 2 min and 1440 min, and the RGB changes were compared with the sensor at time 0. Scanned pictures of the sensor array visually show that all sensors containing H are red-shifted, while others retain their original blue color.

[0302] Specific RGB intensity maps confirm this observation ( Figure 1a to Figure 1f ). These figures also show that the H-containing sensor is stable after about 7 hours. Therefore, for all subsequent experiments, the paper-based PDA sensor was reused approximately 12 h after fabrication.

Embodiment 2

[0303] Example 2 - Plotting Water-Ethanol Mixtures: DA Monomer Ratio

[0304] As a first step to using paper-based PDA sensors in the context of alcoholic beverages, the effect of ethanol (EtOH) in water on the RGB color change has to be considered.

[0305] Different paper-based PDA sensors were fabricated from 1 mM H, P, and T and their mixtures (H / T, P / H, and T / P, 3:1, 1:1, and 1:3 volume ratios). These arrays were evaluated after exposure to 100% EtOH, 10% EtOH, and 100% ultrapure water (H 2 O) RGB color change before and after. Scanned images of the sensor show a strong red shift for 100% EtOH in all cases. Further, only sensors containing H were exposed to 10% EtOH and 100% H 2 O showed a visible color change. Specific RGB intensity plots confirm that 100% EtOH causes the largest changes in red and blue for all tested sensors, while the H-containing sensor was exposed to 10% EtOH and 100% H 2 The variation of O is dominant (Fig. 2a to Fig. 2c).

[0306] Effective...

Embodiment 3

[0307] Example 3 - Plotting Water-Ethanol Mixtures: DA Monomer Concentration

[0308] Next, to further improve the sensitivity and selectivity of the sensor array assembled from T and P, the DA concentration used for its fabrication was decreased stepwise from 100 mM to 10 mM. We hypothesized that lower amounts of PDA on paper might exhibit more sensitive responses when exposed to different solutions. Since the response from the sensor composed of H (moiety) showed a visible color shift from blue to red when 100 mM DA was used during fabrication, lower concentrations were not tested for this component.

[0309] Sensor arrays fabricated from different concentrations of T, T / P (1:1 volume ratio), and P were exposed to 100% EtOH, 10% EtOH, and 100% H 2 Scanned images before and after O revealed a visible color shift from blue to red that varied according to different DA concentrations. Specific RGB intensity maps supported this qualitative assessment (Fig. 3a to 3c). Specifi...

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Abstract

The present invention relates to colorimetric polydiacetylene (PDA) sensor arrays for detection of analytes and levels thereof in aqueous solutions. In particular the present invention relates to methods of characterizing an aqueous solution for at least one analyte, comprising the steps of a) providing a sensor array comprising at least two different poly-diacetylenes, wherein said poly-diacetylenes are spatially separated and individually addressable,b) contacting said sensor array with a sample of said aqueous solution,c) measuring the colorimetric response of said poly-diacetylenes to theaqueous solution,wherein said poly-diacetylenes are polymerized from a composition comprising one or more diacetylene monomer(s) said poly-diacetylenes are capable of a colorimetric response upon contact with said analyte, and wherein the at least one analyte is selected from the group consisting of an organic molecule with a molecular weight below 2000 g / mol, salts thereof and an inorganic salt.

Description

technical field [0001] The present invention relates to colorimetric polydiacetylene (PDA) sensor arrays for detecting analytes and levels of the analytes in aqueous solutions. In particular, the invention relates to the use of such sensors to detect the presence and levels of analytes in beverages such as beer and beer precursors. Background technique [0002] Methods to detect flavor quickly and reliably from complex mixtures such as dairy products or alcoholic and non-alcoholic beverages have important implications for product development, quality and safety. [0003] Today's dominant solutions are still quite complex and labor-intensive, centered on gas chromatography and / or sensing panels. Electronic tongue sensors employing artificial membranes and electrochemical techniques are an emerging concept, but many technical, material, and computational challenges still need to be addressed before they can become widely applicable. Alternatives that allow rapid on-site scre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/52C08F38/02G01N33/14
CPCC08F38/00G01N33/04G01N33/146G01N33/521G01N31/22
Inventor 布丽吉特·玛丽亚·斯塔德勒耶尔维·斯潘杰尔斯法比安·罗伯特·伊特尔
Owner AARHUS UNIV
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