A multiresidue analysis of pesticides in tea using supercritical fluid extraction (SFE) and GC-MS was developed. The preprocessing using SFE shortened the total analysis time. The SFE extract contained less matrices than the extract obtained with organic solvents. However, these matrices disturbed instrumental analysis. So, the extract was cleaned up with ENVI™-Carb/NH2 and InertSep™ SI cartridge. A recovery test was carried out for 245 pesticides spiked in samples at the level of 0.1 μg/g. Recovery rates of 178 pesticides ranged from 70 to 120%, the relative standard deviations (RSDs) were less than 15%, and quantitation limits were between 0.01 and 0.05 μg/g. Based on these results, this method is considered to be useful for multiresidue analysis of pesticides in tea samples.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.3358/shokueishi.53.139 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Machine learning-enhanced detection of chlorpyrifos using molecularly imprinted polymer-coated optical fibers.
Talanta
January 2025
Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, 221005, India. Electronic address:
This paper explores the use of large core declad optical fibers coated with molecularly imprinted polymers for chlorpyrifos detection, a key marker of organophosphate pesticides. The performance of sensor is evaluated using artificial neural networks and principal component analysis. By varying the declad length, the performance of molecularly imprinted polymer-coated fibers is compared to uncoated fibers, and both are used to identify commercial and pure samples of chlorpyrifos pesticides.
View Article and Find Full Text PDFElectrochemical sensors: Types, applications, and the novel impacts of vibration and fluid flow for microfluidic integration.
Biosens Bioelectron
January 2025
School of Engineering and Sciences, Tecnologico de Monterrey, Av. Eugenio Garza Sada, NL, 2501, Sur, 64849, Monterrey, Mexico; Department of Mechanical and Aerospace Engineering, University of California Irvine, Irvine, CA, 92697, USA.
Electrochemical sensors are part of a diverse and evolving world of chemical sensors that are impacted by high demand and ongoing technological advancements. Electrochemical sensors offer benefits like cost-efficiency, short response time, ease of use, good limit of detection (LOD) and sensitivity, and ease of miniaturization while providing consistent analytical results. These sensors are employed in various fields-such as healthcare and diagnostics, environmental monitoring, and the food industry-to detect bacteria, viruses, heavy metals, pesticides, and more.
View Article and Find Full Text PDFLong-term exposure to Emamectin benzoate impairs reproductive health in adult zebrafish and alters neurodevelopment in their offspring.
J Hazard Mater
December 2024
Key Laboratory of Pesticide Environmental Assessment and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China. Electronic address:
Emamectin benzoate (EMB) is a widely used insecticide that can accumulate in aquatic environments under specific conditions of high application intensity or improper management, posing potential risks to aquatic organisms and human health. This study aimed to evaluate the reproductive toxicity of long-term EMB exposure in zebrafish (Danio rerio) and neurodevelopmental toxicity in their offspring. Zebrafish embryos were exposed to various concentrations of EMB (0, 0.
View Article and Find Full Text PDFUnlocking new possibility of FeO@C@Ag nanostructures as an advanced SERS substrate for ultrasensitive detection of low-cross-section urea biomolecules.
RSC Adv
January 2025
Phenikaa University Nano Institute (PHENA), Phenikaa University Hanoi 12116 Vietnam
Surface-enhanced Raman spectroscopy (SERS) is widely recognized as a powerful analytical technique, offering molecular identification by amplifying characteristic vibrational signals, even at the single-molecule level. While SERS has been successfully applied for a wide range of targets including pesticides, dyes, bacteria, and pharmaceuticals, it has struggled with the detection of molecules with inherently low Raman scattering cross-sections. Urea, a key nitrogen-containing biomolecule and the diamide of carbonic acid, is a prime example of such a challenging target.
View Article and Find Full Text PDFAn Electrochemiluminescence Biosensor for Detection of Methyl Parathion With a Novel Probe Ru-MIL-100 via the Acetylcholinesterase Inhibition Coupled With the Reaction Between HAc and Triethylamine.
Luminescence
January 2025
College of Environmental Science and Engineering, Guilin University of Technology, Guilin, China.
It is of great significance to develop sensors for trace pesticide residues detection in food. Herein, an electrochemiluminescence (ECL) sensor with high sensitivity for the detection of methyl parathion (MP) was constructed by combining of the acetylcholinesterase (AChE) enzyme-inhibited reaction with tris-2,2'-bipyridyl ruthenium Ru(bpy) -triethylamine (TEA) system for the first time. A new ECL probe of MIL-100 loaded with Ru(bpy) (Ru-MIL-100) was synthesized, and then Ru-MIL-100 and AChE were immobilized on the electrode with Nafion.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!