We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
A Facile and Rapid Strategy for Quantifying PCBs in Cereals Based on Dispersive Solid-Phase Extraction and Gas Chromatography–Mass Spectrometry: A Reference for Safety Concerns in Sustainable Textiles
Summary
Researchers developed a rapid method using dispersive solid-phase extraction and gas chromatography–mass spectrometry to detect 18 polychlorinated biphenyls in cereals, incorporating carbon nanotubes as a novel cleanup material to improve accuracy and reduce matrix interference.
Cereals and their derivative products such as starch and cyclodextrin are significant natural materials for sustainable textile processing (e.g., sizing, dispersing, etc.). However, the contamination of cereals with polychlorinated biphenyls (PCBs) is often neglected, which has led to increasing concerns due to the adverse effects on end users. Therefore, monitoring PCBs in cereals is of great importance in preventing health risks. However, high starch, protein, and fat contents make cereals a complicated matrix and can challenge the analysis of PCBs in cereals. This work describes a facile and rapid strategy for quantifying 18 PCBs in cereals that included corn, wheat, and rice through dispersive solid-phase extraction and gas chromatography with mass spectrometry. Importantly, this was the first time that carboxyl-modified, multi-walled carbon nanotubes were incorporated in the detection of PCBs in cereals. The influences of several parameters on the extraction and clean-up efficiency were investigated; these included the type and volume of extraction solvent, sonication time, and the type and dosage of the adsorbent. The matrix effects on quantification were also evaluated. This approach exhibited a better clean-up performance. All the analytes showed weak matrix effects, and thus a solvent standard plot could be prepared for their quantification. Spiking experiments in the selected matrices at three concentration levels from 0.5 to 10 μg/kg resulted in satisfactory recoveries that ranged from 79.2% to 110.5% with relative standard deviations (RSDs; n = 6) less than 10.3%. The limits of detection (LODs) and quantification (LOQs) ranged from 0.04 to 0.1 μg/kg and 0.1 to 0.4 μg/kg, respectively. The practical application of this method was investigated by analyzing actual cereal samples, which demonstrated that the proposed approach was a facile and efficient strategy for PCB determination and provided a reference for the safety evaluation of sustainable textiles. The method also could be generalized to other troublesome samples for testing of multiple PCBs.
Sign in to start a discussion.
More Papers Like This
Particle and gas phase sampling of PCDD/Fs and dl-PCBs by activated carbon fiber and GC/MS analysis
Researchers validated an activated carbon fiber filter as an accurate, faster, and cheaper alternative to standard methods for collecting and measuring toxic dioxins and PCBs — persistent organic pollutants — in air samples. The new filter matched the precision of conventional methods while reducing the time and cost of environmental air monitoring.
Strong Sorption of PCBs to Nanoplastics, Microplastics, Carbon Nanotubes, and Fullerenes
Researchers measured PCB sorption to nanoplastics, microplastics, carbon nanotubes, and fullerenes, finding that nanoplastics sorbed PCBs strongly — with sorption coefficients comparable to carbon nanotubes — suggesting nanoplastics may be effective vectors for hydrophobic chemical contaminants.
Magic extraction: solid-phase extraction and analytical pyrolysis to study polycyclic aromatic hydrocarbon and polychlorinated biphenyls in freshwater
A new solventless solid-phase extraction method was tested for extracting polycyclic aromatic hydrocarbons and polychlorinated biphenyls from freshwater samples. The Magic Chemisorber material selectively captured these persistent organic pollutants without the need for large volumes of organic solvents. This cleaner analytical technique reduces hazardous waste while maintaining good recovery of target contaminants.
Simultaneous determination of persistent and emerging organic pollutants in microplastics
Researchers developed and validated a new analytical method to simultaneously detect 45 persistent and emerging organic pollutants sorbed onto microplastics. The method was tested on several polymer types including polypropylene and polyethylene, both pristine and weathered, using solvent extraction and gas chromatography-mass spectrometry. The study provides a practical tool for assessing the chemical contamination that microplastics can carry and transport through the environment.
Chia seed-assisted separation and detection of polyvinyl chloride microplastics in water via gas chromatography mass spectrometry
Scientists used hydrated chia seed mucilage to capture and concentrate PVC microplastics from water, then quantified them via a chemical marker using mass spectrometry. This novel low-cost separation technique could improve the efficiency of detecting PVC microplastics in water samples.