ArticleSe pu = Chinese journal of chromatography2026
[Value assignment technology for 1，3-oleic-2-palmitic triglyceride purity reference material].
Article in Se pu = Chinese journal of chromatography, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
1，3-Oleic-2-palmitic triglyceride （OPO） has received widespread attention as a nutritional fortifier allowed to be added to infant formulas， and there is an urgent need to develop high-purity certified reference material （CRM） to meet the metrological traceability requirements of relevant tests. Value assignment methods for pure materials are a key technical challenge in the development of high-purity CRMs. The commonly used mass balance （MB） method indirectly determines the purity of the material by subtracting impurities， which involves the accurate quantification of structurally similar impurities， moisture， volatile solvents， and non-volatile impurities. Among these steps， the separation and analysis of structurally similar impurities of the main component are the key to MB method. Owing to the lack of ultraviolet/fluorescence chromophores， OPO cannot be effectively detected by liquid chromatography with terminal absorption （190-210 nm）； this technique lacks sufficient sensitivity for low-level related impurities. Therefore， with a universal detector， this study established a high performance liquid chromatography-charged aerosol detector （HPLC-CAD） method for the analysis of structural analogue impurities in OPO， and applied the mass balance method to certify the purity of the reference material. On the other hand， based on quantitative nuclear magnetic resonance （qNMR） technology， a qNMR purity assignment method for OPO purity was established by optimizing key parameters such as NMR internal standards and quantitative peaks. In the mass balance method， an HPLC-CAD was selected as the core technique for quantifying trace structurally similar impurities of OPO. The chromatographic conditions were as follows： Nova Pak C8 column （150 mm×3.9 mm， 4 μm）， acetonitrile-isopropanol （90∶10， volume ratio） at a flow rate of 1.0 mL/min， sample dissolved in
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