Article
Chemistry, Analytical
Radik Mametov, Gulyaim Sagandykova, Fernanda Monedeiro, Boguslaw Buszewski
Summary: The study successfully developed a method for synthesis of polypyrrole coating material and its application in solid-phase microextraction. The coating material was evaluated using various physico-chemical methods, showing good stability in extracting VOCs with low limit of detection values.
Article
Energy & Fuels
Yang-Yang Yan, Chu-Fan Wang, Xing Fan, Zhen-Yu Gao, Wen-Han Wei, Guo-Ming Zhao, Peng Liang, Ran-Ran Hou, Xian-Yong Wei
Summary: Due to the low concentration and detection limit, many compounds in the thermal dissolution extract of coals cannot be detected. Therefore, the introduction of SPME for sampling is necessary to enrich compounds with similar structures and exclude interferences. In this study, SPME with a PDMS coating successfully enriched partial species in the TD extract of Zhaotong lignite and increased the content of aliphatic hydrocarbons.
Article
Chemistry, Analytical
Ida Krasevec, Helena Prosen
Summary: The HF-LPME method was developed for extracting polar benzotriazoles from water samples, with validation for environmental waters using LC-MS/MS. Optimal parameters were determined, with the addition of 0.20 mM EDTA overcoming reduced enrichment factors in natural waters. The method was compared with SPE and DLLME in terms of LODs, repeatability, accuracy, and environmental impact, with HF-LPME showing promising results.
MICROCHEMICAL JOURNAL
(2021)
Article
Biochemical Research Methods
Xiao-Wei Zhang, Yao-Juan Chu, Yu-Hao Li, Xiu-Juan Li
Summary: This study assessed the matrix compatibility of several sol-gel coatings in plasma and whole blood and found that sol-gel coatings exhibited good compatibility in untreated plasma. The sol-gel hydroxy-terminated silicone oil/methacrylic acid fiber demonstrated the highest extraction ability for in vivo sampling. A direct-immersion SPME/gas chromatography-flame ionization detection method was established for the determination of phthalic acid esters in blood, which was rapid, simple, sensitive, and accurate.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Applied
Zolfaghar Aladaghlo, Siamak Javanbakht, Ali Sahragard, Ali Reza Fakhari, Ahmad Shaabani
Summary: An ultrasound-assisted dispersive solid phase microextraction (UA-DSPME) approach was developed for trace level analysis of triazole fungicides in real samples. By using a newly prepared nanosorbent and optimizing extraction parameters, this method achieved good analysis performance.
Article
Environmental Sciences
Pedro Hermano M. Vasconcelos, Andre Luiz M. Camelo, Ari Clecius A. de Lima, Helio O. do Nascimento, Carla B. Vidal, Ronaldo F. do Nascimento, Gisele S. Lopes, Elisane Longhinotti
Summary: Chemometric tools were applied to optimize a fast-solid phase microextraction procedure for the analysis of polycyclic aromatic hydrocarbons in oil-based produced water. The optimized conditions included specific concentrations, time, temperature, and salt concentration, resulting in low detection limits and good recovery rates. This methodology was identified as a suitable and efficient analytical strategy for determining PAHs in produced water from the oil-based industry.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Biochemical Research Methods
Attilio Naccarato, Rosangela Elliani, Antonio Tagarelli
Summary: The present study aimed to develop a simple method for quantitatively determining parabens and bisphenols in human saliva using methyl chloroformate as a derivatizing agent, followed by SPME and GC-QqQ-MS analysis with SRM. Two derivatization strategies were compared and optimized using multivariate analysis, and it was found that the use of methyl chloroformate provided better sensitivity than the classical acetic anhydride derivatization. The performance of the derivatized analytes' sorption process was good using the overcoated fiber (PDMS/DVB/PDMS). The method showed satisfactory results in terms of linearity, limit of quantitation, accuracy, and precision for all parabens and bisphenols, making it a suitable approach for routine biomonitoring purposes.
JOURNAL OF CHROMATOGRAPHY A
(2023)
Review
Biochemical Research Methods
Juan Aspromonte, Steven Mascrez, Damien Eggermont, Giorgia Purcaro
Summary: This review focuses on the applications of solid-phase microextraction and comprehensive multidimensional gas chromatography in food analysis, emphasizing the importance of proper data treatment.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Applied
M. L. Bhavya, R. Ravi, M. Madhava Naidu
Summary: The study used HS-SPME-GC to determine the fingerprinting characteristic of Zingiber zerumbet L. volatiles for differentiating between ginger species. Different fibers, temperature, and time were investigated, with validation showing suitable sensitivity for sesquiterpenes quantification. The developed method's simplicity makes it a convenient tool for comparing different ginger species targeting zerumbone.
NATURAL PRODUCT RESEARCH
(2021)
Article
Chemistry, Analytical
Qidong Yu, Wende Ma, Wenmin Zhang, Hui Chen, Qingqing Ding, Yuheng Guo, Jiangfan Yang, Lan Zhang
Summary: A facile and rapid in-situ room-temperature growth strategy was developed to efficiently fabricate imine-linked COF coated fibers, with high thermal and chemical stability. This strategy was successfully generalized to other two imine-linked COFs and an analytical method for trace pyrethroids detection was developed with high sensitivity and satisfactory recovery when applied to tea samples.
ANALYTICA CHIMICA ACTA
(2021)
Article
Biochemical Research Methods
Catherine E. Sansom, Nigel B. Perry
Summary: Hydrogen is the most efficient carrier gas for gas chromatography, but there are rare reports of artefact formation by hydrogenation of unsaturated compounds on GC. The study found that unsaturated plant volatiles may be hydrogenated on HS-SPME-GC when using H-2 carrier gas with SPME fibre coatings containing DVB polymer or CAR porous particles. It is recommended to conduct parallel analyses with He and H-2 carrier gases or use PDMS-only coated fibres when developing HS-SPME-GC methods for plant volatiles.
PHYTOCHEMICAL ANALYSIS
(2022)
Article
Engineering, Electrical & Electronic
Mansoureh Behzadi
Summary: A pioneer SPME fiber containing polyphenol and graphene oxide nanosheets was successfully utilized for the preconcentration of bisphenol A and bisphenol B with excellent enrichment efficiency and reproducibility. Under optimized conditions, both analytes showed wide linear ranges and low detection limits. The nanocomposite exhibited high recoveries in accuracy tests on real samples.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Chemistry, Analytical
Chen Yu, Fengshou Wu, Xiaogang Luo, Juan Zhang
Summary: A porphyrin-based COF was synthesized and applied for the headspace solid-phase microextraction of PAHs, with optimized parameters leading to a wide linear range, low detection limits, and excellent repeatability. The method showed satisfactory recoveries of PAHs in water and soil samples, indicating its potential for environmental analysis.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Applied
Tiantian Chen, Xinhe Yu, Xinmeng Tian, Jiajia Hu, Yanyan Chen, Guangdou Long, Hui Xu, Guang-Fu Yang
Summary: This study provides in vivo insights into the environmental fates of insecticides in complex living systems with minimized organism damage. Results show that the half-life of insecticides in garlic ranged from 0.43 to 0.96 days, and 55.0% to 80.3% of insecticide residues in garlic were eliminated within the first 24 hours with first-order elimination kinetics.
Article
Pharmacology & Pharmacy
Yanfang Zhao, Jingkun Li, Hanyi Xie, Huijuan Li, Xiangfeng Chen
Summary: This study explores the application of covalent organic nanospheres (CONs) as a fiber coating for the solid-phase microextraction (SPME) of genotoxic impurities (GTIs) from active ingredients (AIs). The synthesized CONs exhibit desirable properties such as high specific surface area, good thermostability, acid and alkali resistance, and suitable crystallinity and porosity. The CON-coated fibers demonstrate high enhancement factors for the target GTIs, and when combined with gas chromatography-mass spectrometry (GC-MS), they enable the sensitive detection of GTIs in a wide linear range with low detection limits, satisfactory recovery, and high repeatability and reproducibility. This suggests that CON-coated fibers hold promise as an alternative for the sensitive detection of GTIs in AI samples.
JOURNAL OF PHARMACEUTICAL ANALYSIS
(2022)
Article
Chemistry, Applied
M. Graca Dias, Elsa Vasco, Francisco Ravasco, Lufsa Oliveira
Summary: This study estimated the vitamin D intake of "adults" and "elderly" populations in Portugal using the TDS methodology. The results showed that the majority of people had inadequate vitamin D intake, well below the Dietary Reference Values.
Article
Chemistry, Applied
Yanan Wang, Jiachen Shi, Yong-Jiang Xu, Chin-Ping Tan, Yuanfa Liu
Summary: This study investigates the variations in lipid digestion profiles among individuals of different ages using in vitro digestion models. The findings suggest that adults have a more comprehensive lipid digestion compared to infants, and infants tend to release shorter chain length and more saturated free fatty acids during digestion. Additionally, the particle sizes in the stomach of the elderly were consistently larger. This study enhances our understanding of how lipids with different degrees of unsaturation undergo digestion in diverse age groups.
Article
Chemistry, Applied
Hyunjong Yu, Huisu Kim, Pahn-Shick Chang
Summary: Chitosan-pectin emulsion-filled hydrogel (EFH) was developed to enhance the bioaccessibility of lipophilic bioactive compounds through intestinal delivery. The EFH, prepared without crosslinking agents, demonstrated improved mechanical strength and compactness with higher pectin concentration. It retained the emulsion at pH 2.0 and released it at pH 7.4, resulting in enhanced release of free fatty acids and improved bioaccessibility of curcumin.
Article
Chemistry, Applied
Tongze Zhang, Siqi Hong, Jia-Rong Zhang, Pin-He Liu, Siyi Li, Zixian Wen, Jianwei Xiao, Guirong Zhang, Olivier Habimana, Nagendra P. Shah, Zhongquan Sui, Harold Corke
Summary: Lactic acid fermentation significantly affects the morphology and physicochemical properties of proso millet starch, including the formation of surface indentations and small pores, decrease in gelatinization temperatures, and changes in hardness and adhesiveness.
Article
Chemistry, Applied
Liqin Kong, Feng Hong, Peng Luan, Yiping Chen, Yaoze Feng, Ming Zhu
Summary: This study presents a novel impedance biosensor using composite nanomaterials and T1R1 as a signal probe, which can competitively and ultra-sensitively detect umami intensity. The biosensor exhibits exceptional analytical performance and is suitable for food flavor evaluation.
Article
Chemistry, Applied
Kunying Lv, Yixin Yang, Qilong Li, Ran Chen, Liang Deng, Yiwei Zhang, Ning Jiang
Summary: Horse's milk, with its high nutritional value and low allergenic proteins, could be a substitute for cow's milk in infant consumption. A proteomic method was used to identify and compare milk fat globule membrane (MFGM) and whey proteins from different horse breeds. The study found differences in protein composition and functionality, which could support the development of formulas more suitable for human infants.
Article
Chemistry, Applied
Enrique Jacobo Diaz-Montana, Helene Brignot, Ramon Aparicio-Ruiz, Thierry Thomas- Danguin, Maria Teresa Morales
Summary: Sensory perception of virgin olive oil is influenced by phenols and volatiles, which are affected by the composition of the oil and biological factors. This study investigated the effect of saliva and phenols on the release of volatiles, and found that the presence of phenols decreased the release of saturated volatiles.
Article
Chemistry, Applied
Wei Zhou, Rui Zhang, Zhen Cai, Fangfang Wu, Yong Hu, Chao Huang, Kun Hu, Yun Chen
Summary: Environmentally friendly and outstanding pH-responsive cationic starch nanoparticles (CSNP) were prepared from pH-sensitive starch. CSNP exhibited nanosize and regular sphere, highly free-flowing molecular chains, and demonstrated excellent pH responsiveness through multiple emulsion/demulsification transitions.
Article
Chemistry, Applied
Andrea Koo, Vinayak Ghate, Weibiao Zhou
Summary: This study suggests that direct seeding may negatively affect the nutritional quality of crops, causing a decrease in ascorbic acid, vitamin K, and total glucosinolate content.
Article
Chemistry, Applied
Tonghao Du, Yazhou Xu, Xiaoyan Xu, Shijin Xiong, Linli Zhang, Biao Dong, Jinqing Huang, Tao Huang, Muyan Xiao, Tao Xiong, Mingyong Xie
Summary: This study successfully improved the ACE inhibitory activity of black sesame seeds by fermenting them with Lactobacillus Plantarum NCU116 and hydrolyzing them using acid protease. The RF-PSO model was used to predict the ACE inhibitory activity during the hydrolysis process. Eight peptides with ACE inhibitory activity were identified from fermented black sesame seed hydrolysates after separation and screening.
Article
Chemistry, Applied
Yao Liu, Songyi Lin, Kexin Liu, Shan Wang, Qiaozhen Liu, Na Sun
Summary: This study analyzed the structural changes of shrimp proteins during digestion, predicted the immunodominant epitopes, and validated their allergenicity. The results showed that shrimp proteins were degraded into peptides during digestion, but still carried IgE epitopes that trigger allergic reactions.
Article
Chemistry, Applied
Tiantian Fu, Hongwei Cao, Yu Zhang, Xiao Guan
Summary: This study investigates the impact of milling on the active components in rice, with a focus on the stability and bioaccessibility of phenols, VB1, and alpha-GABA during cooking and digestion. The findings show that milling exacerbates the instability of gamma-GABA during cooking and VB1 during digestion, and it affects the bioaccessibility of these active compounds.
Article
Chemistry, Applied
Zhihao Yang, Yanru Hou, Min Zhang, Puxin Hou, Chang Liu, Lu Dou, Xiaoyu Chen, Lihua Zhao, Lin Su, Ye Jin
Summary: This study investigated the molecular mechanism of feeding regimes on lamb flavor by using TMT labeling combined with MS. The results showed that pasture-fed groups had higher levels of amino acids and volatile flavor substances compared to concentrate-fed groups. Additionally, several differentially abundant proteins associated with lamb flavor were identified.
Article
Chemistry, Applied
Zixuan Xie, De Zhang, Junyu Zhu, Qianqian Luo, Jun Liu, Jingtao Zhou, Xiaoyong Wang, Yuqiong Chen, Zhi Yu, Dejiang Ni
Summary: This study investigated the acidification of aroma-enhanced black tea during storage. Analysis of non-volatile substances and organic acids using UPLC-Q-TOF/MS and HPLC revealed a decrease in soluble sugars and amino acids, while an increase in organic acids such as oxalic acid, malic acid, and quinic acid. In vitro experiments further demonstrated that the acidification is a result of the decomposition of sugars and amino acids by heating, as well as the oxidation of aromatic aldehydes. Additionally, the study showed that the taste composition of tea infusion is altered, with reduced amino acids, catechins, soluble sugars, and flavonoids. This research provides a theoretical basis for improving the quality of black tea.
Article
Chemistry, Applied
Lin Wang, Falai Ma, Zihan Li, Yan Zhang
Summary: This study developed time-temperature integrators based on amyloglucosidase@Cu3(PO4)2 nanoflowers for monitoring the freshness of chilled pork. The results showed that the integrators were highly reliable and accurate in predicting the quality of chilled pork.