A method for the determination of vitamin A in milk powder was developed by high performance liquid chromatography-isotope dilution mass spectrometry(HPLC-ID MS) and using deuterium-labeled vitamin A as an internal st...A method for the determination of vitamin A in milk powder was developed by high performance liquid chromatography-isotope dilution mass spectrometry(HPLC-ID MS) and using deuterium-labeled vitamin A as an internal standard.RSD of the method was 2.85%.This method was applied in the determination of standard reference material SRM 1849 with satisfactory results.展开更多
A GC-MS method was established for determination of 10 pyrethroids in apple juice concentrate.The sample was extracted by acetone and hexane,and the 10 pyrethroids were separated on a capillary column(DB-5,30 m×2...A GC-MS method was established for determination of 10 pyrethroids in apple juice concentrate.The sample was extracted by acetone and hexane,and the 10 pyrethroids were separated on a capillary column(DB-5,30 m×250 μm×0.25 μm) and determined by GC-MSD.The recoveries of pyrethroids were range of 84%-96% with the detection limits of 3-46 μg/kg.The relative standard deviations were range of 0.68%-5.11%.展开更多
The principle and analysis standards of stable isotope ratio technique were reviewed in this article.The application of isotope ratio mass spectrum in fruit juices authentication and origin traceability was introduced.
文摘A method for the determination of vitamin A in milk powder was developed by high performance liquid chromatography-isotope dilution mass spectrometry(HPLC-ID MS) and using deuterium-labeled vitamin A as an internal standard.RSD of the method was 2.85%.This method was applied in the determination of standard reference material SRM 1849 with satisfactory results.
文摘A GC-MS method was established for determination of 10 pyrethroids in apple juice concentrate.The sample was extracted by acetone and hexane,and the 10 pyrethroids were separated on a capillary column(DB-5,30 m×250 μm×0.25 μm) and determined by GC-MSD.The recoveries of pyrethroids were range of 84%-96% with the detection limits of 3-46 μg/kg.The relative standard deviations were range of 0.68%-5.11%.
文摘The principle and analysis standards of stable isotope ratio technique were reviewed in this article.The application of isotope ratio mass spectrum in fruit juices authentication and origin traceability was introduced.
