Articles by tag "LC-MS/MS"

1. IPPD-Quinone-d5 Handling & Analytical Protocol | Aladdin
   posted this at 15 oct. 2026

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   IPPD-quinone-d5 is a deuterium-labeled (d5) stable-isotope analog of IPPD-quinone—a transformation product of the tire rubber antiozonant N-isopropyl-N′-phenyl-p-phenylenediamine (IPPD)—used primarily as an internal standard for accurate LC-MS/MS quantitation of IPPD-quinone in ...
2. Ractopamine D6 Deuterium-Labeled Standard: Preparation Protocol
   posted this at 15 oct. 2026

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   Ractopamine D6 is a hexadeuterium-labeled stable isotope analogue of ractopamine used as an internal standard in LC-MS/MS quantification of beta-agonist residues in biological matrices and food commodities. Product NameRactopamine D6 SKUR1539471 LabelingHexadeuterium (d6) stable isotope ...
3. Fleroxacin-d3 Internal Standard Protocol for LC-MS/MS Quantification
   posted this at 15 oct. 2026

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   Fleroxacin-d3 is a trideuterium-labeled stable-isotope internal standard designed for accurate, interference-free quantification of the fluoroquinolone antibiotic fleroxacin in biological and environmental matrices by LC-MS/MS. Product NameFleroxacin-d3 SKUF1539420 Isotope LabelingTrideuterium ...
4. Sulfadimethoxine-d4: Deuterated Internal Standard Guide
   posted this at 15 oct. 2026

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   Sulfadimethoxine-d4 is a stable, deuterium-labeled analog of the veterinary sulfonamide antibiotic sulfadimethoxine, widely employed as an isotopically labeled internal standard to enable accurate and precise LC-MS/MS quantification of sulfadimethoxine residues in food, feed, and biological ...
5. PFOA-13C8 Isotope-Labeled Internal Standard for PFAS Analysis
   posted this at 15 oct. 2026

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   Perfluoro-????-octanoic acid (PFOA)-13C8 is a uniformly 13C-labeled isotopologue of PFOA designed as a stable isotope internal standard for highly accurate quantification of perfluoroalkyl and polyfluoroalkyl substances (PFAS) in environmental, biological, and food matrices by LC-MS/MS and ...
6. PFOA-13C8 Isotope-Labeled Internal Standard: Use Guidelines
   posted this at 15 oct. 2026

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   Perfluoro-????-octanoic acid (PFOA)-13C8 is a uniformly 13C-labeled stable isotope analog of PFOA designed for use as an internal standard in quantitative trace-level analysis of per- and polyfluoroalkyl substances (PFAS) by mass spectrometry-based methods. Chemical NamePerfluoro-n-octanoic ...
7. PFOS-13C8 Isotope-Labeled Internal Standard: Protocol & Use Guide
   posted this at 15 oct. 2026

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   Perfluorooctanesulfonic acid 13C8 sodium(PFOS-13C8) is a stable, uniformly 13C-labeled isotopologue of perfluorooctanesulfonic acid sodium salt, specifically designed for use as an isotope dilution internal standard in high-sensitivity LC-MS/MS quantification of PFOS and related per- and ...
8. PFOS-13C8 Stable Isotope Protocol: Preparation & LC-MS Use
   posted this at 15 oct. 2026

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   Perfluorooctanesulfonic acid 13C8 sodium(PFOS-13C8) is a uniformly 13C-labeled stable isotope internal standard used to enable accurate quantification of PFOS and related perfluoroalkyl substances (PFAS) in environmental, biological, and food matrices by isotope dilution liquid ...
9. Choline Metabolism and Detection Methods: Pathway Analysis of Choline, Phosphatidylcholine, Betaine, Acetylcholine, and TMAO
   posted this at 29 juil. 2026

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   Choline metabolism connects cell membrane phospholipid synthesis, methyl donor cycling, cholinergic neurotransmitter generation, hepatic lipid transport, and gut microbiota-related metabolism. Choline metabolism detection should not be limited to free choline alone. Depending on the research ...