Showing 81 - 100 results of 1,443 for search '"mass spectrometry"', query time: 0.07s Refine Results
  1. 81

    Comparison of external calibration and isotope dilution methods for iodine determination in foods by inductively coupled plasma mass spectrometry by Juntima Photi, Premmin Srisakda, Tiyanun Jurkvon, Christophe Zeder, Kunchit Judprasong

    Published 2025-01-01
    “…This study sought to validate the external calibration curve (CAL) method for iodine analysis in 26 selected foods and then to compare the test result with the isotope dilution mass spectrometry (IDMS). Iodine was extracted by tetramethylammonium hydroxide (TMAH) and determined by ICP-MS using CAL and IDMS methods. …”
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  2. 82

    Determination of Polar Pesticides Based on a Modified QuPPe with Liquid Chromatography Coupled to Tandem Mass Spectrometry by Gözde Türköz Bakirci

    Published 2023-01-01
    “…An analytical approach for determining polar pesticides using a Hypercarb column that is based on a modified quick polar pesticide (QuPPe) extraction process combined with liquid chromatography-tandem mass spectrometry (LC-MS/MS) was examined. Maleic hydrazide, glyphosate, glufosinate N-acetyl, glufosinate ammonium, fosetyl Al, ethephon, chlormequat chloride, aminomethyl phosphonic acid N-acetyl, aminomethyl phosphonic acid, cyanuric acid, ethylene thiourea, phosphonic acid, propylene thiourea, and acidified methanol solution were used to extract tomato, wheat, olive, sunflower, and herbal tea samples. …”
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  3. 83

    Determination of Senegenin and Tenuifolin in Mouse Blood by Ultra-High Performance Liquid Chromatography-Tandem Mass Spectrometry and Their Pharmacokinetics by Xiuwei Shen, Xiangyi Dai, Yifan He, Congcong Wen, Qingwei Zhang

    Published 2022-01-01
    “…An ultra-high performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) method for the determination of senegenin and tenuifolin in mouse blood was developed. …”
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    Article
  4. 84

    Some Rare Earth Elements Analysis by Microwave Plasma Torch Coupled with the Linear Ion Trap Mass Spectrometry by Xiaohong Xiong, Tao Jiang, Wenhao Qi, Jun Zuo, Meiling Yang, Qiang Fei, Saijin Xiao, Aimin Yu, Zhiqiang Zhu, Huanwen Chen

    Published 2015-01-01
    “…For some REEs, the generated composite ions were detected in both positive and negative ion modes and further characterized in tandem mass spectrometry. Under the optimized conditions, the limit of detection (LOD) was at the level 0.1 ng/mL using MS2 procedure in negative mode. …”
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  5. 85

    Liquid Chromatography-Mass Spectrometry-Based Metabolomic Analysis of Metabolites and Metabolic Pathways of Selenium-Enriched Auricularia auricula by YUE Shibo, CUI Hang, SHEN Qin, CAO Dongmei

    Published 2025-02-01
    Subjects: “…selenization; auricularia auricula; liquid chromatography-mass spectrometry; non-targeted metabolomics…”
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  6. 86

    Trends towards Effective Analysis of Fluorinated Compounds Using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) by Ruth Lorivi Moirana, Thomas Kivevele, Josephine Mkunda, Kelvin Mtei, Revocatus Machunda

    Published 2021-01-01
    “…Inductively coupled plasma mass spectrometry (ICP-MS) is a promising technique for analysis of FCs and has been rated as the most powerful tool in analytical chemistry. …”
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    Article
  7. 87

    Isolation and Identification of Chemical Constituents from Zhideke Granules by Ultra-Performance Liquid Chromatography Coupled with Mass Spectrometry by Guangqiang Huang, Jie Liang, Xiaosi Chen, Jing Lin, Jinyu Wei, Dongfang Huang, Yushan Zhou, Zhengyi Sun, Lichun Zhao

    Published 2020-01-01
    “…Chemical constituents from Zhideke granules were rapidly isolated and identified by ultra-performance liquid chromatography (UPLC) coupled with hybrid quadrupole-orbitrap mass spectrometry (MS) in positive and negative ion modes using both full scan and two-stage threshold-triggered mass modes. …”
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  8. 88

    Comparison of inductively coupled plasma mass spectrometry and molybdenum blue colorimetry for total phosphorus determination in freshwater invertebrates. by Molly S Costanza-Robinson, Baker J Angstman, Qiting Cai, Charles Forbes, Julia S Keon, Shuyi Lin, Emma D Neill, Elizabeth G Peebles, Ella Roelofs, Eric K Moody

    Published 2025-01-01
    “…However, other elemental methods for P determination are available, including inductively coupled plasma mass spectrometry (ICP-MS). Given the extensive literature using MBC to determine P in organismal samples, it is important to assess P analyses by ICP-MS and MBC to ensure that the two methods produce comparable data. …”
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  9. 89

    Response in Ambient Low Temperature Plasma Ionization Compared to Electrospray and Atmospheric Pressure Chemical Ionization for Mass Spectrometry by Andreas Kiontke, Susan Billig, Claudia Birkemeyer

    Published 2018-01-01
    “…Modern technical evolution made mass spectrometry (MS) an absolute must for analytical chemistry in terms of application range, detection limits and speed. …”
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  10. 90

    Determination of Vitamin B12 in Milk and Dairy Products by Isotope-Dilution Liquid Chromatography Tandem Mass Spectrometry by Baifen Huang, Jingshun Zhang, Mengli Wang, Zengxuan Cai

    Published 2022-01-01
    “…An isotope-dilution liquid chromatography tandem mass spectrometry method was established for the determination of vitamin B12 in milk and dairy products. …”
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  11. 91

    Determination of 4-Methylimidazole in Ammonia Caramel Using Gas Chromatography–Tandem Mass Spectrometry (GC-MS/MS) by Martyna N. Wieczorek, Krzysztof Przygoński, Henryk H. Jeleń

    Published 2018-01-01
    “…A method of 4-MeI determination based on ion-pair extraction and derivatisation with isobutyl chloroformate with subsequent gas chromatography-tandem mass spectrometry analysis was proposed. Tandem mass spectrometry was applied to reduce the influence of matrix and increase the selectivity and sensitivity of the method. …”
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  12. 92
  13. 93

    Study of Grape Polyphenols by Liquid Chromatography-High-Resolution Mass Spectrometry (UHPLC/QTOF) and Suspect Screening Analysis by Riccardo Flamini, Mirko De Rosso, Luigi Bavaresco

    Published 2015-01-01
    “…This method, coupled to liquid chromatography-high-resolution mass spectrometry, is effective in the study of grape metabolomics, in particular for characterization of flavonols, stilbene derivatives, and anthocyanins. …”
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  14. 94
  15. 95

    Optimization and Validation of Thermal Desorption Gas Chromatography-Mass Spectrometry for the Determination of Polycyclic Aromatic Hydrocarbons in Ambient Air by Iñaki Elorduy, Nieves Durana, José Antonio García, María Carmen Gómez, Lucio Alonso

    Published 2018-01-01
    “…Thermal desorption (TD) coupled with gas chromatography/mass spectrometry (TD-GC/MS) is a simple alternative that overcomes the main drawbacks of the solvent extraction-based method: long extraction times, high sample manipulation, and large amounts of solvent waste. …”
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  16. 96

    Compound-Specific Chlorine Isotope Analysis of Organochlorine Pesticides by Gas Chromatography-Negative Chemical Ionization Mass Spectrometry by Jing Zhang, Shenghua Liu, Jianye Gui, Xiaoya Li, Guochen Qi

    Published 2021-01-01
    “…To overcome the mentioned problems, a novel method has been developed for the CSIA-Cl of eight organochlorine pesticides using gas chromatography-negative chemical ionization mass spectrometry (GC-NCI-qMS) in this study. The instrument parameters, acquisition mode, and required injection amounts were optimized in terms of the precision of GC-NCI-qMS. …”
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  19. 99

    Extraction-Free, Direct Determination of Caffeine in Microliter Volumes of Beverages by Thermal Desorption-Gas Chromatography Mass Spectrometry by Xianglu Peng, Melanie Brown, Paul Bowdler, Kevin C. Honeychurch

    Published 2020-01-01
    “…Using a pyrolysis-gas chromatography mass spectrometry system, the conditions required for the direct thermal desorption-gas chromatography mass spectrometry (TD-GC/MS) determination of caffeine were optimised. …”
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  20. 100