Article
Chemistry, Multidisciplinary
Ying Zhou, Yahui Yu, Qian Huang, Huixin Zheng, Ruyi Zhan, Luting Chen, Xingang Meng
Summary: A Quick, Easy, Cheap, Effective, Rugged, and Safe (QuEChERS) pretreatment technique combined with HPLC-MS/MS was successfully applied to detect 26 pesticides in traditional Chinese medicinal leeches. The method involved acetonitrile solution extraction, cleanup with a specific mixture, separation on an ACQUITY BEH C18 column, and determination in dynamic multiple reaction mode. The optimized conditions resulted in good linearity, high recovery rates, low limits of quantification and detection, making it a viable method for pesticide residue detection.
Article
Plant Sciences
Rozalia Veronika Salamon, Adriana Dabija, Agota Ferencz, Gyorgy Tanko, Marius Eduard Ciocan, Georgiana Gabriela Codina
Summary: The production of heavily hopped beers, such as Indian Pale Ale (IPA) styles, is becoming popular in Central European markets. This study investigates the dissolution rate of the main volatile component of hops, beta-myrcene, using a modified dry hopping method. The experiment demonstrates that the modified process provides a higher concentration of beta-myrcene compared to previous studies in the field.
Article
Polymer Science
Andrea Schweighuber, Alexander Felgel-Farnholz, Thomas Boegl, Joerg Fischer, Wolfgang Buchberger
Summary: The importance of mechanical recycling of polymers has increased in recent decades due to government regulations worldwide. The increased thermo-mechanical stress during the recycling process can significantly impact the quality of recyclates. Research has shown the occurrence of odd-numbered linear alkane chains in polyethylene samples and oxidized branched alkanes in polypropylene samples during the recycling process.
POLYMER DEGRADATION AND STABILITY
(2021)
Review
Chemistry, Applied
B. K. Kolita Kamal Jinadasa, Chris Elliott, Tai-Sheng Yeh
Summary: Non-nutritive sweeteners are widely used in the food industry to replace sugar and their determination in foods and the environment is crucial for quality control and product safety. This study reviews mass spectrometry-based methods for the sensitive detection and precise quantification of these compounds. The advantages, disadvantages, and sample preparation procedures of each method are discussed, along with information on the regulations governing the use of sweeteners.
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
(2023)
Article
Biochemical Research Methods
Ana Flavia Barbosa de Oliveira, Aline de Melo Vieira, Jandyson Machado Santos
Summary: Wastewater-based epidemiology (WBE) is an effective tool for quantifying illicit drug biomarkers (IDBs) in wastewater samples to study drug consumption. However, the different chemical properties of IDBs pose challenges in developing analytical methods for multi-analyte analysis. Recent workflows have focused on simplifying and optimizing the analytical workflows to reduce uncertainties, analysis times, and costs in quantifying IDBs. This review article provides an overview of studies published since 2020, highlighting the challenges and trends in analytical workflows for the multi-analysis of IDBs in wastewater samples.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
David J. Bettinardi, M. Alex Brown, Alena Paulenova, Yifen Tsai, Peter Tkac
Summary: This study proposes two methods for separating ultratrace levels of Re from a bulk Mo matrix using either solvent extraction or extraction chromatography, combined with inductively coupled plasma quadrupole mass spectrometry (ICP-MS) detection. The total decontamination factors for Mo achieved are up to 1,700 for solvent extraction and 3,500 for extraction chromatography. Detection and quantification limits were optimized to allow detection and quantification of Re in strip solutions at specific levels.
SEPARATION SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Chemical
Zhijin Hu, Tao Zhang, Li Lv, Yanxiao Chen, Benhe Zhong, Shengwei Tang
Summary: This study systematically investigated the extraction of Fe3+ from phosphoric acid using TBP as extractant, and characterized the extraction phase using FT-IR and UV-vis. DFT simulation was used to analyze the interaction between TBP and HFeCl4, revealing a strong bond formation between Fe and TBP in the extraction process. The results provide insights into the extraction mechanism and complex structure of TBP in extracting Fe3+ from phosphoric acid.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Analytical
Ederina Ninga, Steven J. Lehotay, Yelena Sapozhnikova, Alan R. Lightfield, Gary D. Strahan, Sergio H. Monteiro
Summary: The analysis of chemical residues in foods is a major challenge for developing countries due to limited resources, but implementing simple multiclass, multi-residue methods in monitoring programs can provide significant benefits. This study investigated a streamlined mega-method for analyzing fatty muscle matrices of goat and lamb, which proved to be an effective and efficient approach to replace multiple methods currently used for the same analytical scope.
ANALYTICAL METHODS
(2022)
Article
Engineering, Chemical
Man Feng, Marco Wenzel, Shaona Wang, Hao Du, Yi Zhang, Jan J. Weigand
Summary: The study focused on purifying sodium vanadate solutions by selectively extracting Cr(VI) from strong alkaline aqueous solutions, achieving high purity sodium vanadate through a new approach. The use of Aliquat 336 in combination with TBP showed high extraction power for Cr(IV) while realizing no extraction of V(V) under optimized conditions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Forestry
Eelis S. Halmemies, Hanna E. Brannstrom, Juha Nurmi, Otto Laspa, Raimo Alen
Summary: The study showed that storage season and temperature significantly influenced the chemical composition and degradation rate of bark extractives. Winter-stored bark retained more hydrophilic extractives than summer-stored bark, while lipophilic extractives were higher during summer. Monomeric stilbenoids were also significantly higher during the winter storage period.
Article
Multidisciplinary Sciences
Seung-Hyun Yang, Hoon Choi
Summary: A reliable residue analysis method using HILIC-LC-MS/MS was developed for simultaneous detection of several nereistoxin compounds in animal-origin foods. The method demonstrated good limit of quantitation, linearity, and recovery efficiency, satisfying the criteria outlined in international guidelines.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Analytical
Nicole E. E. Heshka, Kara Rathie, Dani Degenhardt
Summary: This study presents a methodology to accurately extract and quantify diluent hydrocarbons from froth treatment tailings using gas chromatography. Diluent hydrocarbons are separated from residual bitumen using a cold-start temperature program and quantified using commercial standards as well as unprocessed diluent. The quantification of diluent in tailings samples is demonstrated from 60 to 5329 μg/g, with an average diluent recovery of 100 ± 10% shown in the results from quality control standards.
JOURNAL OF SEPARATION SCIENCE
(2023)
Article
Environmental Sciences
Abdulaziz Ibrahim Almohana, Sattam Fahad Almojil, Abdulrhman Fahmi Alali, Khaled Twfiq Almoalimi
Summary: An efficient MOF-801/GO sorbent was fabricated and utilized for the detection of OSPs using GC-FPD. The proposed SPE method showed a linear dynamic range of 0.5-300 mu g L-1 and a detection limit of 0.1-1.1 mu g L-1 for OSP samples. The application of the MOF-801/GO sorbent in dSPE of OSP analytes proved to be a reliable and sensitive methodology for pesticides monitoring in various environmental samples.
Article
Chemistry, Analytical
Fabio Xavier Antunes Sampaioa, Madson Moreira Nascimento, Valdiria Almeida de Oliveira, Sabrina Teixeira Martinez, Jailson Bittencourt de Andrade, Maria Elisabete Machado
Summary: This study successfully applied a miniaturized solid-liquid extraction method combined with dispersive micro-solid-phase extraction to determine the concentration of fourteen polycyclic aromatic sulfur heterocycles (PASH) in the ascidian Phallusia nigra. The results showed that the method was effective and ten PASHs were quantified, with the highest concentrations found in the branchial basket.
MICROCHEMICAL JOURNAL
(2023)
Article
Biochemistry & Molecular Biology
Fengyu Jiang, Weiming Chen, Kai Zhang, Mengmiao Mo, Zhendong Ding, Yongguang Bi, Fansheng Kong
Summary: In this study, sugarcane molasses essential oils (SMEOs) were extracted using microwave-assisted hydrodistillation (MAHD) and analyzed by gas chromatography-mass spectrometry (GC-MS). SMEOs were loaded into mesoporous silica nanoparticles (MSNPs) and evaluated for sustained-release activity. In vivo anti-inflammatory activity assays showed that the main components of SMEOs can inhibit inflammation. The development and application of SMEOs in the fields of food and medicine have certain potential.
