• Home
    • Testimonials
  • How it works
  • About
    • Technical documentation
  • Advantages
  • Contact
  • Press
  • Membership
  •   | FR |
LinkiLab LinkiLab
  • Home
    • Testimonials
  • How it works
  • About
    • Technical documentation
  • Advantages
  • Contact
  • Press
  • Membership
  •   | FR |

Technical Documentation

Chemical analysis: Absorbance spectrophotometer and atomic emission

Principle : The spectroscopy of absorption or emission is probably the oldest analytical method used in the world. it includes two methods of quantitative analysis that can be used to measure the concentrations of approximately 70 elements (metals, metalloids and non-metals). the principle behind these methods of analysis of elements depends on the measurements made in an analyte that is transformed in the form of an atom, the free (atomization). once the atoms cannot rotate or vibrate as molecules, only in this case, the electronic transitions take place when the energy is absorbed. because the transitions are quantized, one obtains a spectrum of lines and elements are detected by spectrometry with optical or mass. this technique is based on the absorption of the radiation to be monochromatic by a cloud of atoms. the atoms in the ground state absorb energy in a certain wavelength produced by a source composed by the same atoms to be analyzed from a source (lamp with hollow cathode). this source produces an electromagnetic radiation intense with a wavelength similar to that absorbed by the atoms. the sensitivity of this technique is proportional to the number of atoms in the ground state.

When an atom absorbs energy from this source, an electron jumps from the ground state to a state less stable « excited state ». returning to the ground state, a photon of light energy is emitted with an intensity proportional to the concentration of the element to be analyzed. the efficiency and reproducibility of the atomization determine the sensitivity, accuracy and reproducibility of this technique. the sensitivity is in the range of parts per million (ppm) and parts per billion (ppb), with additional benefits including speed, high sensitivity and the moderate costs of the instrument.

Interest/Objective:

  • The applications include the analysis of food, cement, ceramics, glass and metals, as well as biochemical, geochemical and environmental.

Spectroscopy NMR

Chemical analysis
8

Photoelectron microscopy

Chemical analysis
7

Mass spectroscopy of secondary ions

Chemical analysis
5

Mass spectrometry

Chemical analysis
7

Absorbance spectrophotometer and atomic emission

Chemical analysis
4

Gas chromatography

Chemical analysis
4

Size-exclusion chromatography

Chemical analysis
4

X-ray fluorescence spectroscopy

Chemical analysis
7
  • Chemical analysis: Absorbance spectrophotometer and atomic emission
  • Available service providers at LinkiLab: +10
Connect to the online marketplace of research services
4
Share

Related Projects

Connectez-vous sur notre application et créez votre compte aujourd'hui. Allons-y !

  • LinkiLab
  • Lyon, France
  • +33 07 56 80 40 71
  • contact@linkilab.fr
  • https://www.linkilab.fr

• A propos
• Fiches techniques
• Conditions Générale d’Utilisation et de Vente

© 2023 LinkiLab | Mentions Légales | Legal

Prev Next