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Papers
61,005 resultsShowing papers similar to Portable potentiometric device for determining the antioxidant capacity
ClearCost-Effective and Wireless Portable Device for Rapid and Sensitive Quantification of Micro/Nanoplastics
Researchers developed a wireless portable device for rapid quantification of micro- and nanoplastics in water samples, offering a field-deployable alternative to laboratory-based analysis for environmental monitoring.
Portable Impedance-Sensing Device for Microorganism Characterization in the Field
This study developed a portable microfluidic device using impedance spectroscopy to rapidly detect and characterize individual microorganisms in heterogeneous field samples. Portable detection technologies are also being applied to monitoring microorganisms associated with microplastic surfaces (the plastisphere) in water.
Analytical applications of smartphones for agricultural soil analysis
Researchers reviewed how smartphones are being used as portable chemical analysis tools for testing agricultural soil quality, covering detection of nutrients, heavy metals, and organic pollutants directly in the field. While smartphone-based methods offer low cost and convenience, their precision currently lags behind lab instruments, but the technology is advancing rapidly.
Electron exchange capacity of pyrogenic dissolved organic matter (pyDOM): complementarity of square-wave voltammetry in DMSO and mediated chronoamperometry in water
Researchers developed a complementary electrochemical method using square-wave voltammetry in DMSO to measure the electron-exchange capacity of pyrogenic dissolved organic matter, offering a faster and mediation-free alternative to existing chronoamperometry approaches.
Performance of a Portable FT-NIR MEMS Spectrometer to Predict Soil Features
Researchers evaluated a portable FT-NIR spectrometer based on micro-electromechanical systems technology for predicting soil properties, finding it performed comparably to laboratory instruments for several key soil features while offering the advantages of portability and lower cost for agricultural monitoring.
Cost-Effective Spectrophotometer for Real-Time Monitoring of Microbial Growth, Analysis of Soil Nutrients, and Detection of Microplastics
Researchers designed and developed a cost-effective spectrophotometer for real-time monitoring of microbial growth, soil nutrient analysis, and microplastic detection, addressing the limitations of high-end instruments that are expensive and confined to sophisticated laboratory settings.
Rapid Microfluidic Electrochemical Sensor for the Detection of Heavy Metal Ions in Water Sample
This paper reviews the development of a microfluidic electrochemical sensor for detecting toxic heavy metal ions in water samples. Human activities including mining, industrial waste, and improper disposal of microplastics in water bodies release heavy metals that pose serious health risks. The sensor offers a rapid, low-cost alternative to laboratory analysis for monitoring water quality.
Integrated Electrochemical Biosensors for Detection of Waterborne Pathogens in Low-Resource Settings
This review covers the development of electrochemical biosensors integrated with microfluidic components for detecting waterborne pathogens, highlighting their potential for portable, affordable water quality monitoring in developing countries. The authors discuss how these devices could address critical gaps in current water safety infrastructure in low-resource settings.
Electrochemical Sensors and Biosensors for Food, Environmental and Biomedical Analysis
Researchers reviewed the field of electrochemical sensors and biosensors, evaluating their sensitivity and selectivity for applications in food safety, environmental monitoring, and biomedical diagnostics as miniaturized alternatives to conventional analytical gold standards.
Smartphone-enabled rapid quantification of microplastics
A smartphone-based system was developed to rapidly quantify microplastics from environmental samples, reducing analysis time from hours or days to a much faster workflow without requiring expensive lab equipment. The method was validated against standard techniques and shown to be suitable for field-deployable microplastic monitoring.
Advances in Portable Heavy Metal Ion Sensors
This review covers advances in portable sensors for detecting heavy metal ions in the environment, including electrochemical, optical, and smartphone-based devices. While focused on heavy metals rather than microplastics directly, the technology is relevant because microplastics often carry heavy metals that can leach into water and food. Better field-testing tools could help track how microplastics transport toxic metals into the environment and human food sources.
A Droplet-Based Microfluidic Impedance Flow Cytometer for Detection of Micropollutants in Water
A droplet-based microfluidic impedance cytometer was designed and tested for in-situ detection of microplastic particles in water, offering a portable and rapid alternative to laboratory-based analytical methods.
Optimization of Electrolytes with Redox Reagents to Improve the Impedimetric Signal for Use with a Low-Cost Analyzer
Researchers investigated the optimization of electrolytes with redox reagents to improve impedimetric signal quality for use with low-cost point-of-care analyzers. The study identified electrolyte formulations that enhance sensitivity and signal-to-noise ratio, providing a pathway for transitioning affordable electrochemical sensing systems toward meeting ASSURED criteria.
A smartphone-assisted photoelectrochemical POCT method via Z-scheme CuCo2S4/Fe3O4 for simultaneously detecting co-contamination with microplastics in food and the environment
Researchers developed a smartphone-based portable testing method that can simultaneously detect two harmful chemicals commonly associated with microplastic contamination in food and the environment. The system achieved extremely sensitive detection limits and showed reliable results when tested on real food and environmental samples. This portable approach could make it easier and more affordable to monitor microplastic-related chemical contamination outside of traditional laboratory settings.
A Method for Extracting Debye Parameters as a Tool for Monitoring Watered and Contaminated Soils
Researchers implemented a microwave reflectometry system using a customized bifilar probe and miniaturized vector network analyzer to monitor soil water content and contaminant presence, developing an automated procedure to extract Debye dielectric parameters from frequency-domain measurements for low-cost quasi-real-time in situ soil contamination monitoring.
Development of microfluidic device to monitor the contamination in drinking water using impedance spectroscopy
Researchers developed a microfluidic device using electrical impedance spectroscopy to detect and monitor microplastic particles in drinking water. The device aimed to provide a real-time, sensitive method for MP contamination monitoring at the point of use.
Field-Portable Microplastic Sensing in Aqueous Environments: A Perspective on Emerging Techniques
This review examines emerging field-portable technologies for detecting and quantifying microplastics in aqueous environments, discussing optical, spectroscopic, and electrochemical sensing approaches. Researchers identify the lack of a standardized, rapid on-site method as the primary bottleneck limiting accurate real-world microplastic monitoring.
A Low-Cost Electrochemical Cell Sensor Based on MWCNT-COOH/α-Fe2O3 for Toxicity Detection of Drinking Water Disinfection Byproducts
A low-cost electrochemical sensor based on MWCNT-COOH/α-Fe2O3 was developed to detect toxicity of drinking water disinfection byproducts, offering a simpler and faster alternative to traditional bioassays for assessing health risks in treated water supplies.
Electrochemical Biosensors for Express Analysis of the Integral Toxicity of Polymer Materials
Electrochemical biosensors based on an oxygen electrode, mediator electrode, and microbial fuel cell using Gluconobacter oxydans bacteria were developed and tested for rapid assessment of the integral toxicity of polymer materials and chemical compounds.
Protocol for low-cost quantification of microplastics through electrochemical impedance spectroscopy from aqueous matrices
Most methods for detecting microplastics in water require expensive equipment or time-consuming laboratory steps. This study presents a simple protocol using electrochemical impedance spectroscopy (EIS) — measuring how microplastics change the electrical resistance of a solution — to rapidly and cheaply quantify plastic particles in water samples. Validated against conventional optical methods, the approach could make routine microplastic monitoring more affordable and accessible, particularly for lower-resource settings or high-throughput screening applications.
Electrochemical approaches for detecting micro and nano-plastics in different environmental matrices
This review evaluates electrochemical sensor technologies as alternatives to conventional spectroscopy methods for detecting micro- and nanoplastics in environmental samples. Researchers found that electrochemical approaches offer advantages in cost, portability, and speed, making them better suited for widespread field monitoring. The study identifies key technical challenges that need to be resolved before these sensors can be broadly adopted for routine environmental surveillance.
Portable Microplastics Electrochemical Sensor: Combining Experiment and Density Functional Theory
Researchers developed a portable electrochemical sensor for on-site microplastic detection in water, integrating density functional theory (DFT) calculations to elucidate electron transfer mechanisms at the sensor interface. The device, controlled via smartphone, demonstrated a sensitive electrochemical response to microplastics in environmental water samples, offering a new paradigm for in-situ pollution monitoring.
Electrochemical and Colorimetric Nanosensors for Detection of Heavy Metal Ions: A Review
This review covers nanosensor technologies being developed to detect heavy metal contamination in environmental and food samples, which is important because heavy metals are linked to cancer, neurological disorders, and developmental problems. While focused on metal detection rather than plastics directly, these affordable and portable sensor technologies could be adapted for detecting microplastic-associated contaminants in water and food.
PortAqua: a low-cost, compact water quality meter for science communication
Researchers designed PortAqua, a low-cost, two-parameter water quality meter capable of measuring pH and conductivity using basic electronics, and tested it in hands-on workshops with students. The device aims to make water quality monitoring accessible to low-income communities that currently rely on smell, color, and taste to judge water safety.