Ratiometric detection of p-nitrophenol and its’ derivative using dual-emissive neuron cell-like carbonized probe based on π···π stacking quenching mechanism

The Analyst ◽  
2021 ◽  
Author(s):  
Feng Li ◽  
Qi-Le Li ◽  
Lei Hu ◽  
Hong-Yu Zhu ◽  
Wenjuan Wang ◽  
...  
Keyword(s):  
Rapid Detection ◽  
Quenching Mechanism ◽  
Π Stacking ◽  
Detection Technology ◽  
Ratiometric Detection ◽  
Earth Ecosystem

p-Nitrophenol and its’ derivative can produce serious harm to mankind’s health and earth ecosystem. Therefore, it is necessary to develop a novel and rapid detection technology of p-nitrophenol and its’...

scholarly journals The Rapid Detection Technology of Lamb Wave for Microcracks in Thin-Walled Tubes

2019 ◽  
Vol 9 (17) ◽  
pp. 3576 ◽  
Author(s):  
Yang ◽  
Wang ◽  
Yang
Keyword(s):  
Lamb Wave ◽  
Rapid Detection ◽  
Detection Method ◽  
Lamb Waves ◽  
Thin Plates ◽  
Depth Information ◽  
Amplitude Curve ◽  
Dispersion Characteristics ◽  
Detection Technology ◽  
Thin Walled

Thin-walled tubes are a kind of pressure vessel formed by a stamping and drawing process, which must withstand a great deal of sudden pressure during use. When microcrack defects of a certain depth are present on its inner and outer surfaces, severe safety accidents may occur, such as cracking and crushing. Therefore, it is necessary to carry out nondestructive testing of thin-walled tubes in the production process to eliminate the potential safety hazards. To realize the rapid detection of microcracks in thin-walled tubes, this study could be summarized as follows: (i) Because the diameters of the thin-walled tubes were much larger than their thicknesses, Lamb wave characteristics of plates with equal thicknesses were used to approximate the dispersion characteristics of thin-walled tubes. (ii) To study the dispersion characteristics of Lamb waves in thin plates, the detection method of the mode was determined using the particle displacement–amplitude curve. (iii) Using a multi-channel parallel detection method, rapid detection equipment for Lamb wave microcracks in thin-walled tubes was developed. (iv) The filtering peak values for defect signal detection with different depths showed that the defect detection peak values could reflect the defect depth information. (v) According to the minimum defect standard of a 0.045-mm depth, 100,000 thin-walled tubes were tested. The results showed that the missed detection rate was 0%, the reject rate was 0.3%, and the detection speed was 5.8 s/piece, which fully meets the actual detection requirements of production lines. Therefore, this study not only solved the practical issues for the rapid detection of microcracks in thin-walled tubes but also provided a reference for the application of ultrasonic technology for the detection of other components.

scholarly journals Smartphone-based molecularly imprinted sensors for rapid detection of thiamethoxam residues and applications

PLoS ONE ◽  
2021 ◽  
Vol 16 (11) ◽  
pp. e0258508
Author(s):  
Sihua Peng ◽  
Aqiang Wang ◽  
Yuyang Lian ◽  
Xi Zhang ◽  
Bei Zeng ◽  
...  
Keyword(s):  
Pesticide Residues ◽  
Rapid Detection ◽  
Rapid Determination ◽  
Detection System ◽  
Residue Analysis ◽  
Differential Pulse ◽  
Detection Technology ◽  
Screen Printed Carbon Electrode ◽  
Relative Standard

In order to achieve rapid detection of thiamethoxam residues in mango, cowpea and water, this study modified the screen printed carbon electrode (SPCE) to make a specific molecular imprinting sensor (Thiamethoxam-MIP/Au/rGO/SPCE) for thiamethoxam. An integrated smartphone platform was also built for thiamethoxam residue analysis. The performance of the complete system was analyzed by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The system was then applied for the rapid determination of thiamethoxam residues in water, mango and cowpea samples. The results showed that the molecular sensor showed good linearity in the range 0.5–3.0 μmol/L of thiamethoxam. The detection limit of thiamethoxam was 0.5 μmol/L. Moreover, the sensor had good reproducibility and anti-interference performance. The average recovery rates of the pesticide residues in water, mango and cowpea samples were in the range of 90–110% with relative standard deviations < 5%. The rapid detection system for thiamethoxam residue constructed in this study was simple, reliable, reproducible and had strong anti-interference. It has broad application prospects in the field detection of thiamethoxam residue, and serves as a valuable reference for the further development of rapid detection technology of pesticide residues in the field of environment and food safety.

scholarly journals Research progress of near-infrared fluorescence immunoassay

2019 ◽  
pp. 001-007
Author(s):  
Ma Ai Jin
Keyword(s):  
Rapid Detection ◽  
Near Infrared ◽  
Infrared Detection ◽  
Research Progress ◽  
Recent Improvement ◽  
Basic Principles ◽  
Detection Technology ◽  
Food Borne ◽  
Highly Sensitive ◽  
Application Potential

Near-infrared fl uorescence immunoassay has been widely studied in the bio analytical fi eld. This review mainly introduces the basic principles of near-infrared spectroscopy and near-infrared detection technology, and summarizes the properties, characteristics and recent improvement of optical properties and signal intensity of three near-infrared fl uorescence probes (i.e. organic fl uorophores, quantum dots and rare earth compounds). We describe the applications of near-infrared fl uorescence technology in immunoassay, and prospect the application potential of lateral fl ow assay (LFA) based on this probe in the rapid detection of pathogens. Our team intends to establish a new platform which has highly sensitive near-infrared fl uorescence probes (NIFPs) combined with portable and simple immunochromatographic test strips (ICTSs) for rapid detection of food borne viruses. This will provide technical support for a rapid detection on the port.

Research on Rapid Detection Technology for Irregular Surface Products

2012 ◽  
Vol 468-471 ◽  
pp. 1148-1151
Author(s):  
Xin Zhang ◽  
Da Wei Wu ◽  
Yu Zhu Li
Keyword(s):  
Rapid Detection ◽  
Detection System ◽  
Secondary Development ◽  
Measurement Technology ◽  
Digital Measurement ◽  
Irregular Surface ◽  
Space Efficiency ◽  
Detection Technology

In this paper, the digital rapid detection system is established, which includes digital measurement technology, secondary development of CATIA technology, multi-point flexible clamping platform, and searching algorithm of positioning point. This system effectively solves the rapid detection and registration issues for space irregular surface products. The principle of digital rapid detection system is introduced. This instances shows that the system can greatly improve the space efficiency of the detection of irregular surface products, and makes the results more reliable.

Trace Detection of Organophosphorus Pesticides in Vegetables via Enrichment by Magnetic Zirconia and Temperature-Assisted Ambient Micro-Fabricated Glow Discharge Plasma Desorption Ionization Mass Spectrometry

The Analyst ◽  
2021 ◽  
Author(s):  
Yuhan Yang ◽  
Yuting Li ◽  
Zhijun Huang ◽  
Yonghui Tian ◽  
Cheng Qian ◽  
...  
Keyword(s):  
Glow Discharge ◽  
Rapid Detection ◽  
Discharge Plasma ◽  
Organophosphorus Pesticides ◽  
Glow Discharge Plasma ◽  
Ionization Mass ◽  
Trace Detection ◽  
Desorption Ionization ◽  
Plasma Desorption ◽  
Detection Technology

In this study, an innovative rapid detection technology for quickly screening and quantifying organophosphorus pesticides (OPPs) in vegetables was developed based on ambient micro-fabricated glow discharge plasma desorption / ionization...

Ion mobility spectrometry fingerprints: A rapid detection technology for adulteration of sesame oil

2016 ◽  
Vol 192 ◽  
pp. 60-66 ◽  
Author(s):  
Liangxiao Zhang ◽  
Qian Shuai ◽  
Peiwu Li ◽  
Qi Zhang ◽  
Fei Ma ◽  
...  
Keyword(s):  
Ion Mobility Spectrometry ◽  
Ion Mobility ◽  
Rapid Detection ◽  
Sesame Oil ◽  
Detection Technology
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