Ascorbic Acid Modified Metal Nanoparticles for Manganese Ion Detection
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Solution Overview
Problem
Flame atomic absorption spectrometry is expensive and bulky, making it unfavorable for reducing measurement costs and facilitating quick detection and field measurements, especially for determining metal ion concentrations like manganese ions.
Innovation Solution
Modified metal nanoparticles, such as gold or silver nanoparticles, are surface-modified with ascorbic acid to enhance interaction efficiency with manganese ions, allowing for colorimetric detection using a color card set and electrochemical methods to determine manganese ion concentrations, and a portable concentration detection device is developed for these purposes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If flame atomic absorption spectrometry is used for metal ion concentration determination, then measurement accuracy is improved, but device cost and bulkiness increase
Solution Approach 1:
The patent extracts the detection function from the complex flame atomic absorption spectrometry system and implements it using simple metal nanoparticles with characteristic colors. The nanoparticles themselves serve as the detection element, eliminating the need for expensive and bulky spectrometry apparatus while maintaining the ability to determine metal ion concentrations through color observation.
Solution Approach 2:
The patent employs inexpensive metal nanoparticles as disposable detection reagents. These nanoparticles can be easily prepared and do not require expensive instrumentation, making them suitable for low-cost, portable detection applications where the detection system itself rather than expensive equipment performs the measurement function.
2Measurement precision
If flame atomic absorption spectrometry is used for metal ion concentration determination, then measurement accuracy is improved, but detection speed and portability decrease
Solution Approach 1:
The patent extracts the detection function from the complex flame atomic absorption spectrometry system and implements it using simple metal nanoparticles with characteristic colors. The nanoparticles themselves serve as the detection element, eliminating the need for expensive and bulky spectrometry apparatus while maintaining the ability to determine metal ion concentrations through color observation.
Solution Approach 2:
The metal nanoparticles inherently possess color characteristics that enable direct visual detection of metal ions without requiring complex instrumentation. The system is self-sufficient, using the natural optical properties of the nanoparticles to perform detection, which dramatically simplifies the apparatus and enables portable, rapid field measurements.
3Reliability
If metal nanoparticles are surface-modified with ascorbic acid, then interaction efficiency with metal ions is improved, but manufacturing complexity increases
Solution Approach 1:
The patent uses ascorbic acid as an intermediary substance to modify the surface of metal nanoparticles. This intermediary layer enhances the interaction between the nanoparticles and metal ions, improving detection reliability. The ascorbic acid modification is achieved through a relatively simple chemical process that coats the nanoparticle surfaces, balancing improved performance with manageable manufacturing complexity.
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 enables cost-effective, quick, and portable detection of manganese ion concentrations, offering a lower-cost alternative to traditional spectrometry with enhanced sensitivity through electrochemical methods, suitable for field measurements.
Implementation Method 1
a surface modification step is conducted, wherein the metal nanoparticles and the ascorbic acid solution are mixed, such that surfaces of the metal nanoparticles are modified by the ascorbic acid molecules and/or ions
Implementation Method 2
an electrochemical step is conducted, wherein the analyte solution undergoes an electrochemical reaction, so as to obtain a current peak value of the analyte solution
Implementation Method 3
a colorimetry step is conducted, wherein a color of the mixing solution is compared with the colors of the color cards
Data Source
AI summary
A method for manufacturing modified metal nanoparticles includes steps as follows. Metal nanoparticles are provided, wherein each of the metal nanoparticles is a gold nanoparticle or a silver nanoparticle. An ascorbic acid solution is provided, wherein the ascorbic acid solution includes ascorbic acid molecules and/or ascorbic acid ions. A surface modification step is conducted, wherein the metal nanoparticles and the ascorbic acid solution are mixed, such that surfaces of the metal nanoparticles are modified by the ascorbic acid molecules and/or ascorbic acid ions to obtain the modified metal nanoparticles.