All Analytical chemistry articles – Page 3

  • GC simple animation
    Resource

    Chromatography: Techniques

    Learn about two fundamental techniques underpinned by chromatography: high performance liquid chromatography (HPLC) and gas chromatography–mass spectrometry (GC-MS)

  • spin-spin coupling 3
    Resource

    Nuclear magnetic resonance (NMR) spectroscopy: Hydrogen

    Numclear magnetic resonance (NMR) is particularly useful in the identification of the positions of hydrogen atoms (1H) in molecules. This is an invaluable technique in the identification of organic compounds and commonly used in analytical laboratories

  • electron promotion
    Resource

    Ultraviolet–visible (UV-vis) spectroscopy: Explanation of colour

    Why do some compounds appear certain colours? The electron configuration of transition metal complexes is essential in understanding their behaviour. Understand the theory of how d-orbitals influence colour through their shape and crystal field splitting

  • bonding orbitals
    Resource

    Ultraviolet–visible spectroscopy (UV-vis): The origin of colour in organic compounds

    DIscover how unsaturation in organic compounds leads to colour. Such electon configuration allows transitions between orbitals of lower energy and antibonding orbitals occur when electromagnetic radiation of suitable energy is absorbed by the molecule.

  • crystal field splitting
    Resource

    Ultraviolet–visible (UV-vis) spectroscopy: Colour in transition metal compounds

    Transition elements are found in the d-block of the periodic table and the most interesting feature of transition metal compounds is that most are highly coloured.

  • IR regions
    Resource

    Infrared (IR) spectroscopy: More complicated molecules

    Learn about the fundamental physics responsible for the IR spectra of more complicated molecules. Bringing together vibrational modes, bond strengths and dipole moments — and how these translate to the recorded spectra.

  • dipole moment
    Resource

    Infrared (IR) spectroscopy: Energy levels

    Infrared spectroscopy reflects the type of bonding present within a molecule, learn how the energy levels of bond vibrations and dipole moments contribute to the frequencies observed

  • dispersive spectrometer
    Resource

    Infrared (IR) spectroscopy: Uses of IR spectroscopy

    Infrared spectroscopy is a valuable technique in analytical chemistry. Learn about how spectra arise and the instruments used to measure them

  • vibrational frequencies
    Resource

    Infrared (IR) spectroscopy

    Absorption of infrared radiation brings about changes in molecular vibrations within molecules and ‘measurements’ of the ways in which bonds vibrate gives rise to infrared spectroscopy. Atom size, bond length and bond strength vary in molecules and so the frequency at which a particular bond absorbs infrared radiation will be different over a range of bonds and modes of vibration.

  • electromagnetic radiation
    Resource

    Introduction to spectroscopy

    Get back to basics with this primer on the principles of spectroscopic techniques, including infrared (IR), ultraviolet-visible (UV-vis) and nuclear magnetic resonance (NMR). To make it even easier, each technique has clear explanations and descriptions supported by animations.

  • adsorption chromatography
    Resource

    Chromatography

    Chromatography covers a broad range of physical methods used to separate and/or analyse complex mixtures. It can be preparative or analytical and has a wide range of applications.

  • eye rods and cones
    Resource

    Ultraviolet–visible (UV-vis) spectroscopy

    Learn how UV-visible radiation can be used to shed light on chemical identification and how our senses percept colour. From the theory behind molecular orbitals and electronic transitions to the application of this technique with relatable examples. Includes examples and interactive simulations to aid understanding.

  • mass spectrometer
    Resource

    Mass spectrometry (MS)

    Mass spectrometry is a powerful technique in the modern analytic laboratory. Learn the fundamental theory behind the operation of a mass spectrometer.

  • nuclear magnetic resonance
    Resource

    Nuclear magnetic resonance (NMR) spectroscopy

    Discover how nuclear magnetic resonance (NMR) spectroscopy works, with this series of topics breaking down the fundamental theory. Covering the electronic environment of atoms right up to demonstrating the practical identification of molecules. Includes examples and interactive simulations to aid understanding.

  • A photo showing students working on a Chemistry Practical
    Ideas

    Reinventing the chemistry practical

    2018-12-13T10:37:00Z

    Get students to tackle practicals without you 

  • Image
    Resource

    Smartphone spectrometer

    In association with

    Make your own spectrometer with a DVD and a smartphone camera. This resource includes teacher, technician, and student guides.

  • Metal padlock on blue door
    Ideas

    Escape the classroom: basic puzzles

    2018-11-30T13:47:00Z

    Six puzzles to challenge and enthuse your students

  • A hand examines clear glass bottles
    Analysis

    Finding the fake booze

    2018-10-12T14:54:00Z

    Ever wondered what Raman spectrometry is? Here’s how it can find out what’s in a bottle without opening it.

  • RES00002201-L
    Resource

    Qualitative analysis quizzes

    In association with

    Find out more about our quizzes and watch the associated videos. The quizzes consist of 10 questions in each section and focus on providing formative feedback to students. The range of question types includes text response, numerical response, drag and drop and multiple choice. These quizzes are available free to ...

  • Illustration of a kitchen with the chemical structures of molecules found in indoor air pollution
    Feature

    Pollution in your home

    2018-08-28T09:37:00Z

    Measuring air pollutants lurking indoors, with classroom resources