Showing 361 - 380 results of 969 for search '"liquid chromatography"', query time: 0.06s Refine Results
  1. 361

    A Highly Selective Analytical Method Based on Salt-Assisted Liquid-Liquid Extraction for Trace-Level Enrichment of Multiclass Pesticide Residues in Cow Milk for Quantitative Liquid... by Habtamu Bekele, Weldegebriel Yohannes, Negussie Megersa

    Published 2023-01-01
    “…In this study, a simple, inexpensive, selective, and fast salting-out assisted liquid-liquid extraction (SALLE) technique coupled with high-pressure liquid chromatography-diode array detection (HPLC-DAD) was developed for the extraction, preconcentration, and analysis of trace level seven multiclass pesticide residues in pasteurized and raw cow milk samples. …”
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  2. 362

    Detection of Residual Levels and Associated Health Risk of Seven Pesticides in Fresh Eggplant and Tomato Samples from Narayanganj District, Bangladesh by Md. Nur Alam, M. Alamgir Zaman Chowdhury, M. Sabir Hossain, Mohammad Mijanur Rahman, M. Abdur Rahman, Siew Hua Gan, Md. Ibrahim Khalil

    Published 2015-01-01
    “…The analysis of pesticide residues was performed by high-performance liquid chromatography with photodiode array detection. A large percentage of the eggplants (50%) and tomatoes (60%) from the Narayanganj district were contaminated with pesticides, and all of the levels were above the maximum residual limit (MRL) proposed by the EC regulation. …”
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  3. 363

    Development of Nanozyme-Labeled Biomimetic Immunoassay for Determination of Sulfadiazine Residue in Foods by Jingbo He, Li Zhang, Longhua Xu, Feifan Kong, Zhixiang Xu

    Published 2020-01-01
    “…The method was also used for the quantitative analysis of sulfadiazine residues in milk powder and milk samples, producing results which correlated well with those obtained by high-performance liquid chromatography.…”
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  4. 364

    Illumination on Chemical Compounds from Qufeng Zhitong Capsule and Its Potential Pharmacological Mechanism against Rheumatoid Arthritis Based on UHPLC/Q-Orbitrap-MS Combined with N... by Mengjie Xue, Lihua Zhang, Yuting Zhao, Qixuan Mu, Ying Cui, Ke Qian, Xin Chai

    Published 2022-01-01
    “…In this study, 61 compounds including 16 phenylpropanoids, 15 organic acids, 13 alkaloids, seven flavonoids, six iridoids, one saccharide, two aldehydes, and one saponin in QZC were simultaneously identified and traced to their herbal origins by ultra-high performance liquid chromatography tandem Q-Exactive Orbitrap high-resolution mass spectrometry (UHPLC/Q-Orbitrap-MS), where 31 of them were unambiguously identified by reference compounds, and the other 30 were tentatively characterized. …”
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  5. 365

    New discoveries of the action of L-ascorbic acid (vitamin C) - Enhanced efficacy in formulations by Andressa Costa de Oliveira, Ana Lucia Morocho-Jacome, Tércio Elyan Azevedo Martins, Claudinéia Aparecida Sales de Oliveira Pinto, André Rolim Baby, Maria Valéria Robles Velasco

    Published 2025-01-01
    “…Antioxidant activity was assessed using a DPPH assay, and L-AA content was quantified by high-performance liquid chromatography. The thiobarbituric acid reactive substances method characterized the inhibition of lipid peroxides in the stratum corneum ex vivo. …”
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  6. 366

    Determination of Ketorolac in the Effluent from a Hospital Treating Plant and Kinetics Study of Its Photolytic Degradation by Hector Hugo Ortega Soto, Jorge Javier Ramírez García, Paula Gamboa Suárez, Angie Michelle Dávila Estrada

    Published 2017-01-01
    “…Ketorolac was extracted from wastewater samples through solid-phase extraction (SPE) cartridges, then it was identified and quantified by high-performance liquid chromatography (HPLC). Ketorolac was detected in concentrations between 0.1376 and 0.2667 μg/L. …”
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  7. 367

    Analysis of Puerarin and Chemical Compositions Changes in Kudzu Root during Growth Period by Yiguo Zhao, Mei Xu, Zhinneg You, Dongsheng Li, Mingquan Zhou, Yupeng Zhu, Chao Wang

    Published 2014-01-01
    “…In addition, the puerarin content was determined by high performance liquid chromatography (HPLC) method. The results showed that acid-soluble polysaccharides content of kudzu root increased with each growth period. …”
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  8. 368

    How Phenolic Compounds Profile and Antioxidant Activity Depend on Botanical Origin of Honey—A Case of Polish Varietal Honeys by Katarzyna Jaśkiewicz, Teresa Szczęsna, Jacek Jachuła

    Published 2025-01-01
    “…High-performance liquid chromatography with photodiode-array detection (HPLC-DAD) was used to determine the phenolic compound composition of honey extracts. …”
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  9. 369

    Identification of new process-related impurity in the key intermediate in the synthesis of TCV-116 by Testen Ana, Plevnik Miha, Štefane Bogdan, Cigić Irena Kralj

    Published 2019-03-01
    “…Structural elucidation of impurity was achieved by liquid chromatography hyphenated to different high resolution mass analyzers. …”
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  10. 370

    Development of Micellar HPLC-UV Method for Determination of Pharmaceuticals in Water Samples by Danielle Cristina da Silva, Cláudio Celestino Oliveira

    Published 2018-01-01
    “…Method for extraction and determination of amoxicillin, caffeine, ciprofloxacin, norfloxacin, tetracycline, diclofenac, ibuprofen, nimesulide, levonorgestrel, and 17α-ethynylestradiol exploiting micellar liquid chromatography with PDA detector and solid-phase extraction was proposed. …”
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  11. 371

    Quantification of Sterol and Triterpenol Biomarkers in Sediments of the Cananéia-Iguape Estuarine-Lagoonal System (Brazil) by UHPLC-MS/MS by Giovana Anceski Bataglion, Hector Henrique Ferreira Koolen, Rolf Roland Weber, Marcos Nogueira Eberlin

    Published 2016-01-01
    “…Sterols and triterpenols present in sedimentary cores from 12 stations along the Cananéia-Iguape estuarine-lagoonal system were investigated by ultra-high performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS). …”
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  12. 372

    Comparative Studies on the pH Dependence of DOW of Microcystin-RR and -LR Using LC-MS by Gaodao Liang, Ping Xie, Jun Chen, Ting Yu

    Published 2011-01-01
    “…The dependence of the n-octanol/water distribution ratio (DOW) of MC-RR and -LR to pH was measured by high-performance liquid chromatography combined with mass spectrometry (LC-MS). …”
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  13. 373

    Use of Selected Essential Oils to Control Aflatoxin Contaminated Stored Cashew and Detection of Aflatoxin Biosynthesis Gene by Abeer R. M. Abd El-Aziz, Mohamed A. Mahmoud, Monira R. Al-Othman, Munirah F. Al-Gahtani

    Published 2015-01-01
    “…Five commercially essential oils (thyme, garlic, cinnamon, mint, and rosemary) were tested to determine their influence on growth and aflatoxin production in A. flavus and A. parasiticus by performing high-performance liquid chromatography (HPLC). The results showed that the tested essential oils caused highly significant inhibition of fungal growth and aflatoxin production in A. flavus and A. parasiticus. …”
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  14. 374

    Pharmacokinetics study of a supersaturatable self-microemulsifying drug delivery system for ellagic acid by UHPLC-Q-TOF-MS by Wang Jinglong, Fan Liqun, Zhang Lihua, Zheng Dandan, Wang Yingzi, Sun Xiao, Ji Yonghui

    Published 2021-12-01
    “…To evaluate the bioavailability of ellagic acid loaded super-saturatable self-microemulsifying drug delivery system (S-SMEDDS), its pharmacokinetic properties were studied in rats with an ultra-high performance liquid chromatography-quadrupole time-of-flight tandem mass spectrometry. …”
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  15. 375

    Magnetic Solid-Phase Extraction Based on β-Cyclodextrins/Acrylic Acid Modified Magnetic Gelatin for Determination of Moxidectin in Milk Samples by Yinzhu Shang, Jing Luo, Peng Wang, Xiaoya Zhao, Cheng Ye, Shaofei Guo

    Published 2016-01-01
    “…A rapid, simple, and effective method for the analysis of moxidectin in milk samples was established by MSPE coupled with liquid chromatography-fluorescence detection. The limit of detection was 0.1 ng·mL−1 and the recoveries from milk samples were in the range of 93.8%–112.5%. …”
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  16. 376

    Dissipation and Residues of Thiram in Potato and Soil by Shaowen Liu, Aijuan Bai, Li Zhou, Chuanshan Yu, Yanjie Li, Sufang Fan, Canping Pan

    Published 2015-01-01
    “…Thiram residues were determined by methylation derivation method with high performance liquid chromatography (HPLC). Wettable powder (WP) formulation containing 25% thiram was applied at 2320 g active gradient hm−2 (a.i. hm−2) dosage for the dissipation study. …”
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  17. 377

    Diagnosis of Methyl Malonicaciduria from 2013 to 2018 by Alina Concepción Álvarez, Ivette Camayd Viera, Norma Elena de León Ojeda, Alina García García, Laritza Martínez Rey, Daniel Quintana Hernández

    Published 2020-02-01
    “…The identification of methylmalonic acid was performed by gas chromatography / mass spectrometry, while the homocysteine quantification by high performance liquid chromatography. <br /><strong>Results:</strong> chromatographic methods allowed the identification and quantification of methylmalonic acid and homocysteine, respectively. …”
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    Article
  18. 378

    High Levels of Perfluorooctane Sulfonate in Children at the Onset of Diabetes by Barbara Predieri, Lorenzo Iughetti, Cristiana Guerranti, Patrizia Bruzzi, Guido Perra, Silvano E. Focardi

    Published 2015-01-01
    “…Perfluorinated compounds were measured using high performance liquid chromatography with electrospray ionization tandem mass spectrometry. …”
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  19. 379

    Metabolomic Analysis of the Chemical Composition of Chongjue Luohan Tea by QIAN Yuanfeng, YANG Gaozhong, XU Weilin, XU Guodong, DENG Huifang, LAN Bingying, LIN Zhi, LÜ Haipeng

    Published 2025-02-01
    “…To elucidate the chemical material basis of the flavor quality of Chongjue Luohan tea, four representative tea samples (Zifu, Ankang, Ping’an and Jufu teas) were analyzed by sensory evaluation and metabolomics based on ultra-high performance liquid chromatography-quadrupole-mass spectrometry (UPLC-Q-MS). …”
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  20. 380

    Antioxidant Activity and Isolation of Luteoline from Centaurea behen L. Grown in Iran by Akbar Esmaeili, Zahra Mousavi, Maryam Shokrollahi, Ali Shafaghat

    Published 2013-01-01
    “…The product extract has been isolated by UV, column chromatography (CC), and preparative high-performance liquid chromatography (HPLC). The structures involved were elucidated by 1H and 13C nuclear magnetic resonance (NMR) and heteronuclear multiple-bond correlation (HMBC) spectra. …”
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