Sensitive colorimetric detection of Cu2+ by simultaneous reaction and electrokinetic stacking on a paper-based analytical device

2018 ◽  
Vol 139 ◽  
pp. 357-362 ◽  
Author(s):  
Lei Liu ◽  
Mao-Rong Xie ◽  
Fang Fang ◽  
Zhi-Yong Wu
Keyword(s):  
Colorimetric Detection ◽  
Electrokinetic Stacking ◽  
Analytical Device

Highly efficient sample stacking by enhanced field amplification on a simple paper device

Lab on a Chip ◽  
2016 ◽  
Vol 16 (18) ◽  
pp. 3460-3465 ◽  
Author(s):  
Biao Ma ◽  
Yi-Zhen Song ◽  
Ji-Cheng Niu ◽  
Zhi-Yong Wu
Keyword(s):  
Sample Stacking ◽  
Highly Efficient ◽  
Field Amplification ◽  
Paper Device ◽  
Signal Improvement ◽  
Electrokinetic Stacking ◽  
Analytical Device

Electrokinetic stacking based on field amplification was firstly introduced to a paper-based analytical device, and over 1000-fold signal improvement was achieved.

Fast and highly efficient multiplexed electrokinetic stacking on a paper-based analytical device

2021 ◽  
pp. 107041
Author(s):  
Yu-Qi Liu ◽  
Bin Ji ◽  
Xiang-Hong Yan ◽  
Shuang Lv ◽  
Fang Fang ◽  
...  
Keyword(s):  
Highly Efficient ◽  
Electrokinetic Stacking ◽  
Analytical Device

scholarly journals Molecular Diagnostic of Ochratoxin A with Specific Aptamers in Corn and Groundnut via Fabrication of A Microfluidic Device

2021 ◽  
Author(s):  
Deepshikha Shahdeo ◽  
Azmat Ali Khan ◽  
Amer M Alanazi ◽  
Yun Suk Huh ◽  
Shruti Shukla ◽  
...  
Keyword(s):  
Ochratoxin A ◽  
Limit Of Detection ◽  
Colorimetric Assay ◽  
Animal Health ◽  
Colorimetric Detection ◽  
Molecular Diagnostic ◽  
Detection Range ◽  
Vis Spectroscopy ◽  
Wide Range ◽  
Analytical Device

Abstract Ochratoxin A (OTA) is one of the predominant mycotoxins that contaminate a wide range of food commodities. In the present study, a 36-mer aptamer was used as a molecular recognition element coupled with gold nanoparticles (AuNPs) for colorimetric detection of OTA in a microfluidic paper-based analytical device (µPADs). The µPADs consisted of three zones: control, detection, and sample, interconnected by channels. The biophysical characterizations of aptamer conjugated AuNPs were done by UV-vis spectroscopy (UV-vis), dynamic Light Scattering (DLS), and transmission electron microscopy (TEM). The developed colorimetric assay for OTA showed a limit of detection of 242, 545, and 95.69 ng/mL in water, corn, and groundnut, respectively. The HPLC detection method achieved acceptable coefficient in standard curves (r2 = 0.9995), better detection range, and recovery rates in spiked corn and groundnut samples as 43.61 ± 2.18% to 87.10 ± 1.82% and 42.01 ± 1.31% to 86.03 ± 2.64% after multiple sample extractions and cleanup steps. However, the developed µPADs analytical device had the potent ability to rapidly detect OTA without any extraction pre-requirement, derivatization, and cleanup steps, thus illustrating its feasibility in the animal health sector, agricultural, and food industries.

scholarly journals A Microfluidic Paper-Based Analytical Device for Type-II Pyrethroid Targets in an Environmental Water Sample

Sensors ◽  
2020 ◽  
Vol 20 (15) ◽  
pp. 4107 ◽  
Author(s):  
Sumate Pengpumkiat ◽  
Jintana Nammoonnoy ◽  
Watcharaporn Wongsakoonkan ◽  
Pajaree Konthonbut ◽  
Pornpimol Kongtip
Keyword(s):  
Water Sample ◽  
Detection System ◽  
Low Cost ◽  
Colorimetric Detection ◽  
Environmental Water ◽  
Type Ii ◽  
Environmental Water Sample ◽  
Detection Approach ◽  
Hydrophobic Barrier ◽  
Analytical Device

A detection method for type-II pyrethroids in an environmental water sample using a microfluidic paper-based analytical device (µPAD) is reported here. The detection approach is based on the formation of cyanide from the hydrolysis of type-II pyrethroids and the colorimetric detection of cyanide on a layer-based µPAD. Parafilm and inexpensive laminating pouches were used to create a hydrophobic barrier for the assay on the µPAD. This detection approach was selective to type-II pyrethroids in water for which an environmental water sample was tested. The calibration curves for cypermethrin, deltamethrin, cyhalothrin, and fenvalerate ranged from 2 to 40 µg/mL without sample preconcentration. The lower concentrations of type-II pyrethroids can be assessed by including a preconcentration step prior to the detection on a µPAD. This detection system provides an alternative platform for fast, semiquantitative testing for pesticide contamination in environmental surface water by allowing for portability, low reagent/sample consumption, and low-cost testing.

A novel, simple and low-cost paper-based analytical device for colorimetric detection of Cronobacter spp.

2018 ◽  
Vol 1036 ◽  
pp. 80-88 ◽  
Author(s):  
Luhong Sun ◽  
Yujun Jiang ◽  
Ruili Pan ◽  
Mingyu Li ◽  
Rui Wang ◽  
...  
Keyword(s):  
Low Cost ◽  
Colorimetric Detection ◽  
Analytical Device

Two orders of magnitude electrokinetic stacking of proteins in one minute on a simple paper fluidic channel

2017 ◽  
Vol 9 (18) ◽  
pp. 2703-2709 ◽  
Author(s):  
Biao Ma ◽  
Song-Fang Xie ◽  
Lei Liu ◽  
Fang Fang ◽  
Zhi-Yong Wu
Keyword(s):  
Bovine Hemoglobin ◽  
Fluidic Channel ◽  
Model Protein ◽  
Stacking Effect ◽  
Electrokinetic Stacking ◽  
Analytical Device

New insights were brought into the field amplified stacking effect implemented on a paper-based analytical device, and a model protein of bovine hemoglobin was 150-fold stacked within 60 sec.

scholarly journals Development of a paper-based analytical device for colorimetric detection of uric acid using gold nanoparticles–graphene oxide (AuNPs–GO) conjugates

2016 ◽  
Vol 8 (38) ◽  
pp. 6965-6973 ◽  
Author(s):  
Sanjay Kumar ◽  
Pulak Bhushan ◽  
Shantanu Bhattacharya
Keyword(s):  
Gold Nanoparticles ◽  
Uric Acid ◽  
Graphene Oxide ◽  
Colorimetric Detection ◽  
Analytical Device

A novel paper-based device for colorimetric detection of uric acid was developed based on the peroxidase-like activity of gold nanoparticles–graphene conjugates (AuNPs–GO).

Paper-based analytical device for colorimetric detection of Cu2+ in Brazilian sugarcane spirits by digital image treatment

2020 ◽  
Vol 159 ◽  
pp. 105463
Author(s):  
Gabriel M. Fernandes ◽  
Júlia de Sousa ◽  
João Flávio da Silveira Petruci ◽  
Alex D. Batista
Keyword(s):  
Digital Image ◽  
Colorimetric Detection ◽  
Analytical Device
Sign in / Sign up

Export Citation Format

Share Document