Article
Food Science & Technology
Josep Pons, Alex Bedmar, Nerea Nunez, Javier Saurina, Oscar Nunez
Summary: The study utilized HPLC-UV and HPLC-FLD fingerprinting methods to authenticate different types of teas and effectively detect and quantify chicory adulteration, ensuring the quality and authenticity of food products.
Article
Chemistry, Analytical
Wan-Jun Long, Hai-Long Wu, Tong Wang, Ming-Yue Dong, Ru-Qin Yu
Summary: The proposed strategy in this study combines HPLC-DAD with a second-order calibration method for fast and simultaneous determination of twelve preservatives in cosmetic products. The method shows good accuracy, green characteristics, and reduced solvent consumption, making it an attractive alternative for multiple preservatives determination in complex cosmetic samples.
MICROCHEMICAL JOURNAL
(2021)
Article
Agriculture, Dairy & Animal Science
Francesca Onofrio, Francesca Longo, Tabita Mauti, Elena Pagani, Patrizia Baravalle, Bruno Neri
Summary: A single-step analytical method utilizing HPLC and pre-column derivatisation was developed for simultaneous determination of eleven amino acids in pet food and feed. The method showed high sensitivity and specificity with the use of diode array and fluorometric detectors. Method validation using certified reference materials demonstrated good linearity, precision, recovery, and specificity. The method was successfully applied to assess the nutritional quality of feed materials and verify the completeness of pet foods for dogs and cats.
ANIMAL FEED SCIENCE AND TECHNOLOGY
(2023)
Article
Plant Sciences
Miguel Baltazar, David Oppolzer, Ana Carvalho, Irene Gouvinhas, Luis Ferreira, Ana Barros, Jose Lima-Brito
Summary: Seed hydropriming or nutripriming improves the quality and nutritional value of wheat grain without the need for repeated pre-sowing treatment.
Article
Food Science & Technology
Ana M. Ares, Laura Toribio, Jesus A. Tapia, Amelia Gonzalez-Porto, Mariano Higes, Raquel Martin-Hernandez, Jose Bernal
Summary: This study investigated the use of free amino acids as markers for the geographical origin and harvesting period of bee pollen. The results showed that the differences in amino acid composition can be used to determine the source and harvesting period of bee pollen. This study provides a new method for the authentication of bee pollen using free amino acids as biomarkers.
Article
Biochemistry & Molecular Biology
Juliana A. Barreto Peixoto, Gerardo Alvarez-Rivera, Rita C. Alves, Anabela S. G. Costa, Susana Machado, Alejandro Cifuentes, Elena Ibanez, M. Beatriz P. P. Oliveira
Summary: The study found that rosemary infusions are rich in various phenolic compounds and free amino acids, exhibiting strong antioxidant potential and providing the body with necessary antioxidants. Consuming rosemary infusions helps maintain the body's antioxidant status and prevent oxidative stress-related diseases.
Article
Environmental Sciences
Anna Krol, Monika Gajec, Ewa Kukulska-Zajac
Summary: In the oil and gas industry, tracers are essential for estimating residual oil saturation, marking fracture locations, identifying fluid flow directions, locating faults, etc. The developed HPLC/FLD method for determining the fluorescent tracer uranine in formation water samples has been validated and can be successfully applied in similar substances.
Article
Chemistry, Analytical
Irina Timofeeva, Kira Stepanova, Andrey Bulatov
Summary: The new automated microextraction method demonstrated efficient extraction of polycyclic aromatic hydrocarbons in tea infusion with fast sample processing speed and no need for centrifugation.
Article
Food Science & Technology
Emmanuel Oladeji Alamu, Abebe Menkir, Michael Adesokan, Segun Fawole, Busie Maziya-Dixon
Summary: This study developed and applied NIRS prediction models for quantifying amino acids in biofortified quality protein maize. The NIRS method proved to be fast, cost-effective, and non-destructive for screening multiple genotypes in maize breeding. The calibration models showed good prediction performances for certain amino acids but need improvement for others. Further work is recommended to enhance the model's accuracy.
Article
Chemistry, Multidisciplinary
Osama I. Abdel Sattar, Hamed H. M. Abuseada, Mohamed S. Emara, Mahmoud Rabee
Summary: Three eco-friendly and cost-effective analytical methods were developed and optimized for quantitative analysis of veterinary drug residues in production wastewater samples. These methods included chemometric analysis, thin layer chromatography, and high performance liquid chromatography. The proposed methods were validated and showed no significant difference in accuracy and precision compared to official and reported methods.
Article
Chemistry, Analytical
Rui Han, Fei Wang, Chuanfeng Zhao, Meixing Zhang, Shihai Cui, Jing Yang
Summary: In this study, amino- and carboxyl-functionalized magnetic KIT-6 materials were designed for the solid phase extraction of pyrethroids and neonicotinoids. The characterization of the materials was conducted, and factors such as material dosage and solution pH were optimized. Both physical and chemical adsorption mechanisms were observed during the adsorption process. The two nanocomposites were successfully used to enrich the insecticides in environmental water samples, suggesting great potential for insecticide monitoring in complex environmental samples.
Article
Chemistry, Analytical
Ting Wang, Jie Cheng, Jinmao You, Zhiwei Sun
Summary: A selective and rapid HPLC-FLD method based on D-mu -SPE and precolumn derivatization was established for determining fumonisins. The method utilized MIL-101 as sorbents to selectively enrich fumonisins from feed samples, and the labeled extracts showed strong fluorescence. The method achieved excellent linearity and sensitivity, and was successfully applied to the analysis of fumonisins in feed samples.
MICROCHEMICAL JOURNAL
(2023)
Article
Food Science & Technology
Laura Barp, Sabrina Moret, Giorgia Purcaro
Summary: Polycyclic aromatic hydrocarbons (PAHs) are common environmental and processing contaminants generated by organic matter combustion processes. The contamination of PAHs in vegetable oils can come from various sources, including environmental pollution, oil processing, and migration from food contact materials. A purification method using solid-phase extraction (SPE) and high performance liquid chromatography-fluorometric detector (HPLC-FLD) analysis was developed to isolate PAHs from the complex matrix of edible oil. Evaluation of the pomace oil supply chain revealed an increase in PAH contamination with storage time and a significant contribution of the pomace drying process to the total PAH content.
Article
Nutrition & Dietetics
Jian Li, Junmei Ma, Qiang Li, Sufang Fan, Lixin Fan, Hongyu Ma, Yan Zhang, Lei Zheng
Summary: This research demonstrates the development of a simple, sensitive, and accurate method for simultaneous determination of 35 free amino acids in tea samples using UPLC-Q-TOF/MS. The method showed good linearity, low limits of detection, and high recovery rates.
FRONTIERS IN NUTRITION
(2021)
Article
Chemistry, Analytical
Quinn Neale, Alexandre Prefontaine, Taylor Battellino, Benilde Mizero, Darien Yeung, Victor Spicer, Nediljko Budisa, Helene Perreault, Rene P. Zahedi, Oleg V. Krokhin
Summary: This study systematically evaluates the chromatographic behavior of post-translationally/chemically modified peptides and validates the results using data from over 70 relevant modifications. By comparing the retention properties of modified and nonmodified peptides, the effect of modifications can be described and predictions can be made.
ANALYTICAL CHEMISTRY
(2023)