Results 31 to 40 of about 28,173 (303)

Investigation into the predictive performance of colorimetric sensor strips using RGB, CMYK, HSV, and CIELAB coupled with various data preprocessing methods: a case study on an analysis of water quality parameters

Journal of Analytical Science and Technology, 2021
The potential use of colorimetric sensors has received significant attention due to its feasibility for use in various applications. After reacting with a sample, the image of the colorimetric sensor can be captured and converted into digital data using ...
Nutthatida Phuangsaijai, Jaroon Jakmunee, Sila Kittiwachana   +2 more
doaj   +1 more source

Rapid Trace Detection of Sulfite Residue in White Wine Using a Multichannel Colorimetric Nanozyme Sensor

Foods, 2023
As a commonly used food additive, sulfite (SO32−) is popular with food manufacturers due to the functions of bleaching, sterilizing, and oxidation resistance. However, excess sulfites can pose a threat to human health.
Xiaoyue Yue, Long Fu, Chaoyun Wu, Sheng Xu, Yanhong Bai   +4 more
doaj   +1 more source

Methyl-3-(2-hidroxy-5-nitrophenyl amino)-3-phenylpropanoate Based Colorimetric Sensor for Oxyanions

Indonesian Journal of Chemistry, 2020
A colorimetric anion sensor of methyl-3-(2-hydroxy-5-nitrophenyl amino)-3-phenylpropanoate bearing –OH and –NH groups as binding sites and nitrophenyl as a signaling unit, has been successfully accomplished.
Venty Suryanti, Fajar Rakhman Wibowo, Sekar Handayani   +2 more
doaj   +1 more source

Improving Color Accuracy of Colorimetric Sensors [PDF]

Sensors, 2018
Accurate measurements of reflectance and color require spectrophotometers with prices often exceeding $3000. Recently, new “color instruments” became available with much lower prices, thanks to the availability of inexpensive colorimetric sensors. We investigated the Node+ChromaPro and the Color Muse, launched in 2015 and 2016 by Variable Inc.
Eric Kirchner, Pim Koeckhoven, Keshav Sivakumar   +2 more
openaire   +2 more sources

Colorimetric Detection of the SARS-CoV-2 Virus (COVID-19) in Artificial Saliva Using Polydiacetylene Paper Strips

Biosensors, 2022
The spread and resurgence of the SARS-CoV-2 virus (COVID-19 disease) threatens human health and social relations. Prevention of COVID-19 disease partly relies on fabricating low-cost, point-of-care (POC) sensing technology that can rapidly and ...
Christopher D. Prainito, Gaddi Eshun, Francis J. Osonga, Daniel Isika, Cynthia Centeno, Omowunmi A. Sadik   +5 more
doaj   +1 more source

A colorimetric sensor array of porous pigments [PDF]

The Analyst, 2009
The development of a low-cost, simple colorimetric sensor array capable of the detection and identification of toxic gases is reported. This technology uses a disposable printed array of porous pigments in which metalloporphyrins and chemically-responsive dyes are immobilized in a porous matrix of organically modified siloxanes (ormosils) and printed ...
Sung H, Lim, Jonathan W, Kemling, Liang, Feng, Kenneth S, Suslick   +3 more
openaire   +2 more sources

Evaluation of a low cost wireless chemical sensor network for environmental monitoring [PDF]

, 2008
We present work on the development and testing of a low-cost wireless chemical sensor network (WCSN) for monitoring irritant/toxic gases in the environment.
Dermot Diamond, Jer Hayes, Beirne, Stephen, Lau, King-Tong, Stephen Beirne, King-Tong Lau, Hayes, Jer, Diamond, Dermot   +7 more
core   +1 more source

Dual Colorimetric Sensor for Hg2+/Pb2+ and an Efficient Catalyst Based on Silver Nanoparticles Mediating by the Root Extract of Bistorta amplexicaulis

Frontiers in Chemistry, 2020
Environmental pollution derivated from toxic metals and organic toxins is becoming a serious issue worldwide because of their harmful effects on the ecosystem and human health.
Farid Ahmed, Farid Ahmed, Humaira Kabir, Hai Xiong   +3 more
doaj   +1 more source

In situ monitoring of environmental water quality using an autonomous microfluidic sensor [PDF]

, 2010
An autonomous microfluidic sensor for phosphate in environmental waters has been developed and assessed in laboratory and field trials. The sensor is based on the molybdenum yellow method for phosphate detection in which a phosphate-containing sample is ...
Dermot Diamond, Maher, Damien, Conor Slater, Slater, Conor, Damien Maher, Diamond, Dermot, John Cleary, Cleary, John   +7 more
core   +1 more source

High-Precision Colorimetric Sensing by Dynamic Tracking of Solvent Diffusion in Hollow-Sphere Photonic Crystals

Research, 2022
Expensive instruments and complicated data processing are often required to discriminate solvents with similar structures and properties. Colorimetric sensors with high selectivity, low cost, and good portability are highly desirable to simplify such ...
Qianqian Fu, Jianping Ge, Chen Chen, Zichen Wang, Fan Yang, Yadong Yin   +5 more
doaj   +1 more source