876 results
Search Results
Now showing 1 - 10 of 876
Item Metadata only Determination of mineral contents in Thai herbs using inductively coupled plasma mass spectrometry(Mahidol University. Mahidol University Library and Knowledge Center, 2000) Sarawut Lunvongsa; Juwadee Shiowatana; Duangjai Nacapricha. This work attempted to determine 24 metals in 17 common Thai herbs and 5 herb capsules using a multielemental analytical technique, Inductively Coupled Plasma Mass Spectrometry (ICP-MS). The performance of ICP-MS has been investigated as a function of a... values probably due to incomplete digestion. As, Cr, Fe and Se gave higher values than certified values possibly owing to positive polyatomic interferences. The isotope ratios after mass bias correction of 53Cr/52Cr, 54Fe/57Fe and 82Se/77Se were foundItem Metadata only Feasibility of tablet identification by direct injection electrospray Ionization high resolution time of flight mass spectroscopy(Mahidol University. Mahidol University Library and Knowledge Center, 2014) Kieran Misser; Prapin Wilairat; Nopadol ChaikumThe objective of this work was to study the feasibility of identifying unknown tablet samples by directly introducing the sample as solution into the electrospray ionization port of a high resolution time-of-flight mass spectrometer (HRTOF-MS...) without prior separation by liquid chromatography. Thirty-four known drugs were analyzed by this method, among which 65% were identified, 26% were identified with some condition and 9% could not be identified from their mass spectrum. A procedureItem Metadata only Development of method for analysis of urinary trinitrotoluene and its metabolites by gas chromatography mass spectrometry(Mahidol University. Mahidol University Library and Knowledge Center, 2009) Smart Preklang; Pornpimol KongtipItem Metadata only Determination of lead, barium and antimony by Inductively Couple Plasms-Mass Spectrometry (ICP-MS) and Scanning Electron Microscope-Energy Dispersive X-ray (SEM/EDX) on hands of occupations(Mahidol University. Mahidol University Library and Knowledge Center, 2010) Apiwadee Tongsong; Chairat Manasatienkij; Chachawin RangbphaiItem Metadata only Multiresidue analysis of [beta]-agonists in porcine tissues by capillary electrophoresis-mass spectrometry(Mahidol University. Mahidol University Library and Knowledge Center, 2008) Oraphan Anurukvorakun; Noppamas SoonthornchareonnonItem Metadata only Source identification of elephant ivory and rice based on multi-element fingerprinting and selenoproteomic analysis of rice using Mass Spectrometry based approaches(Mahidol University. Mahidol University Library and Knowledge Center, 2023) Pracha Cheajesadagul; Atitaya Siripinyanond; Juwadee Shiowatana; Szpunar, Joanna; Waret VeerasaiThe present PhD research is focused on analytical chemistry challenges based on mass spectrometry-based approaches concerning source identification of elephant ivory and rice based on multi-element fingerprinting and selenoproteomic analysis of rice.... In the first part, the so-called micro-analytical technique, named laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) was developed for source identification of Asian and African elephant ivories. Thirty-seven ivory samples with knownItem Metadata only Investigation of reduction of iodate to iodide prior to kinetic determination of iodine using cerium(IV)-arsenic(III) reaction(Mahidol University. Mahidol University Library and Knowledge Center, 2001) Supasin Suwannachoat; Duangjai Nacapricha; Prapin WilairatItem Metadata only Multiresidue analysis of banned substances in livestock drinking water by high-performance liquid chromatography-mass spectrometry(Mahidol University. Mahidol University Library and Knowledge Center, 2013) Chusak Ardsoongnearn; Leena Suntornsuk; Nongluck Ruangwises), and ion trap MS using electrospray ionization (ESI) in tandem mass spectrometry mode (MS/MS) were optimized. The eight antimicrobial agents were separated in 22 min using gradient elution of acidified water (pH 5.0) and acetonitrile, nebulizer gas at 35... in animal feed and drinking water. This work focused on development of liquid chromatography coupled to an ion trap mass spectrometer (LC-MS ion trap) for the simultaneous separation of these drugs in animal drinking water. The HPLC analysis was performedItem Open Access Development of MRM based ultra-performance liquid chromatography in combination with a mass spectrometry method for the absolute quantification of targeted phospholipid in the zebrafish model(Mahidol University. Mahidol University Library and Knowledge Center, 2022) Thapa, Kajol, 1996-; Sakda Khoomrung; Chalermchai Mitrpantquadrupole-mass spectrometry (UPLC-TQ-MS) method for the absolute quantification of targeted PLs. In brief, the mixture of twelve lipid standards and an internal standard (IS) was extracted using MTBE/MeOH (5:1 v/v). Then, the polar and neutral lipids were... can give rise to thousands of isomers/isobars. Considering the complexity of PLs, a number of different approaches have been proposed in lipidomics earlier, ranging from high-throughput technologies such as shotgun to highly sensitive tandem massItem Open Access งานสังเคราะห์ เรื่อง การพัฒนาวิธีวิเคราะห์ระดับยาในสารคัดหลั่งจากร่างกายมนุษย์และเภสัชผลิตภัณฑ์ด้วยเทคนิค Liquid Chromatography with Mass Spectrometry และการตรวจสอบเพื่อยืนยันความถูกต้องของวิธีวิเคราะห์ตามมาตรฐานสากลเพื่อใช้ในงานเภสัชวิทยาคลินิก(2560) ปิยาภัทร พงศ์นรินทร์; มหาวิทยาลัยมหิดล. คณะแพทยศาสตร์ศิริราชพยาบาล. สาขาเภสัชวิทยาคลินิก