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How strong is your decaff tea really? An analytical approach to survey
A quick survey of a typical decaffeinated tea showed some interesting results. Showcased here are some analytical procedures typically used to evaluate levels of caffeine in samples. Limitation of this single point determination are discussed.
See this link for how the method was developed: ua-cam.com/video/gBBXQPu7U-E/v-deo.htmlfeature=shared
Chapters:
0:00 Overview
00:30 Brewing the tea
01:32 Submitting samples for analysis
03:52 Interpreting the data from reports
08:35 Summarizing the results
Переглядів: 38

Відео

LC-MS Method Development: Accurate Mass Acquisition on Time of Flight (TOF) instrument
Переглядів 127Місяць тому
Showcasing the entire workflow from instrument calibration, method parameters, submitting worklists and evaluating the data. Here an example analysis demonstrates submission of a caffeine standard at 500 PPB (or 500 ng/mL), alongside blanks, some basic UV interpretation, as well as accurate mass error evaluation.
MassHunter Qualitative Analysis - Ep08 - with molecular structure correlator (MSC)
Переглядів 3746 місяців тому
How to export a .cef file from Qualitative Analysis and interpret the spectra based on in silico fragmentation in molecular structure correlator (MSC)
MassHunter Qualitative Analysis - Ep07 - exporting results in CSV, PDF, custom workflows
Переглядів 7156 місяців тому
using DA reprocessor and custom workflow builder for automating acquisitions (importing formulae from a worklist)
MassHunter Qualitative Analysis - Ep06 - Compound Discovery with TOF MS/MS data in a workflow
Переглядів 7116 місяців тому
How to confirm identification of molecular features using MS/MS. See video Ep05 in the series for creating MS/MS inclusion list.
MassHunter Qualitative Analysis - Ep05 - Compound Discovery with TOF MS data
Переглядів 6386 місяців тому
Using Molecular Feature Extraction (MFE) - estimating background noise, formula prediction using molecular formula generation (MFG). Using databases to assign IDs and exporting for MS/MS
MassHunter Qualitative Analysis - Ep04 - RNA Oligo UV purity determination
Переглядів 5176 місяців тому
Manual reviewing and automated workflow of RNA Oligonucleotide UV data, verifying delay times and determining the purity of the peak using different approaches. Includes some tips on integration algorithms.
MassHunter Qualitative Analysis - Ep03 - Navigation
Переглядів 6776 місяців тому
how to extract Base peak chromatograms (BPCs), Extract ion chromatograms (EICs), instrument curves from data files.
MassHunter Qualitative Analysis Ep02 - Navigation and Extract ion chromatograms.
Переглядів 1,5 тис.6 місяців тому
Extracting spectra, different ways of creating extracted ion chromatograms (EICs), subtracting background spectra, using the Mass caliper, Mass isotope calculator. Basic EIC extraction from MS/MS data files, basic fragment interpretation.
MassHunter Qualitative Analysis Ep01 - Basic Navigation
Переглядів 2,5 тис.6 місяців тому
Qualitative Analysis - Ep01 - Navigation Part 1. Basic navigation, opening files, zooming, layouts, basic subtracting of spectra.
FIY: Fabricate It Yourself - Camera mount adapter (ONSHAPE part design, Cura slicing)
Переглядів 7210 місяців тому
Informative video on how to start fabricating a camera mount adapter that will repurpose existing action camera accessories. An M6 bolt is used instead of ¼” screw, as this was readily available. We delve into the Onshape part design and Cura slicing. See the link for the basic design in Onshape: cad.onshape.com/documents/1050dbd8a0cf5437b7817899/w/f9da46b6c147699889c8469b/e/72558fab94499ff4b72...
Openlabs CDS Chemstation installation configuration and licensing
Переглядів 2,8 тис.Рік тому
How to install Openlab CDS Chemstation, configure an instrument, and load license
Qualitative LC MS HRMS Part 2 - Fragment confirmation for confidently confirming compounds
Переглядів 3992 роки тому
A subsequent follow-on discussion of confirming MS/MS or fragmentation of diazepam in High Resolution Mass Spectrometry (HRMS).
Qualitative LC MS HRMS - interpreting mass accuracy and isotope patterns
Переглядів 2,5 тис.2 роки тому
Brief evaluation of LC-MS high resolution mass spectrometry (HRMS) data with discussions around mass accuracy (or error) and what we can infer from isotopologues.
Agilent LC-MS 6545 QTOF HILIC Target Suspect screening
Переглядів 8182 роки тому
Agilent LC-MS 6545 QTOF HILIC Target Suspect screening
Agilent 8890 GC-MS SIM Quant Data
Переглядів 4 тис.2 роки тому
Agilent 8890 GC-MS SIM Quant Data
Quantitative Analysis GCMS
Переглядів 12 тис.2 роки тому
Quantitative Analysis GCMS
Agilent 8890 GC MS Qualitative Analysis TMS derivatization
Переглядів 2,1 тис.2 роки тому
Agilent 8890 GC MS Qualitative Analysis TMS derivatization

КОМЕНТАРІ

  • @jorgecabrera9406
    @jorgecabrera9406 4 місяці тому

    Thanks for video, can you upload the carpet fot this chromatogram please

  • @syednoman3617
    @syednoman3617 6 місяців тому

    how do you choose qualifier and quantifier ions?

    • @openlabsolutions
      @openlabsolutions 6 місяців тому

      Typically we use the most abundant fragment as quantifier, it will be collision energy dependent, however it was optimized on your system. A qualifier is also carefully chosen not to interfere with other analogues or isomeric/isobaric species.

  • @komalhayat417
    @komalhayat417 8 місяців тому

    Is this some software? Because i do lcms that doesn't show such interface and options

  • @narthanaasenavarayan7564
    @narthanaasenavarayan7564 10 місяців тому

    Hi I have chromatography graph of lcms data but i cannot list out the compouds can you help me find it i am a Research Scholar

  • @ruthbarrientos9239
    @ruthbarrientos9239 Рік тому

    Thank you so much 😊