Pei Wu

Lab Journal

  • HPLC Analysis of Paracetamol and Caffeine

    Experiment conducted on September 23, 2024 Overview This experiment explored the application of High-Performance Liquid Chromatography (HPLC) for quantitative analysis of pharmaceutical compounds. Using an Agilent 1100 Series HPLC with VWD detector and reversed-phase C18 column, we aimed to separate and quantify paracetamol and caffeine in a mixture. Method Calibration standards were prepared using stock…

  • Determination of ethanol in alcoholic beverages

    Experiment conducted on October 7, 2024 Overview This experiment focused on determining ethanol content in alcoholic beverages using gas chromatography with an internal standard method. Using an Agilent GC-7820a with FID and a J&W Scientific DB-WAXETER column, we aimed to quantify ethanol content and compare it with labeled values. The analysis employed 2-butanol as an…

  • Analysis of an unknown alkane mixture (GC)

    Experiment conducted on September 16, 2024 Overview This experiment explored the application of gas chromatography (GC) for qualitative analysis of alkane mixtures. Using retention time analysis, we aimed to identify individual components in various unknown mixtures. The hypothesis centred on the ability to identify compounds based on their characteristic retention times, which was tested using…