C12.6 Instrumental analysis
No description yet. This curated deck is ready for daily study.
Card preview (9)
What are some benefits of modern instrumental methods over older methods?
They are highly accurate and sensitive They are quicker They enable very small samples to be analysed
What are the main disadvantages of using instrumental methods?
It is usually very expensive Takes special training to use Gives results that can often be interpreted only by comparison with data from know substances?
What is the purpose of using flame emission spectroscopy?
Analyse samples for metal ions
How is flame emissions spectroscopy carried out?
The sample is heating in a flame The energy provided excites electrons in the metal ions - making them jump into higher energy levels When they fall back to a lower energy level - the energy is released as light energy
What is the purpose of a spectroscope?
To analyse the wavelengths of the light produced in the spectrometer
What is the line spectrum?
Each type of metal ion absorbs and gives out its own characteristic pattern of radiation
How can the concentration of the metal ions present in a sample be determined?
The spectrometer can measure the intensity of light with a specific wavelength known to be characteristic of a particular metal ion
What are the benefits of using flame emission spectroscopy?
Can provide accurate ways to monitor water for metal ions Mercury is a dangerous toxin that can build up in your body - therefore it needs to be detected
What is the use of flame emission spectrometers in the steel industry?
Steel is a mixture of elements with iron The steelmakers need to control carefully the amount of trace metals present - as the quality of steel depends on this