Chemiluminescence oxidation analyzer series

The chemiluminescence (CL) analyzer from our new partner Tohoku Electronic Industrial Co. allows the analysis of the oxidation behavior of polymers and organic materials under the influence of different gases and temperatures. Main focus of the analysis are factors like initial oxidation level or determination of the oxidation induction time (OIT) and temperature (OOT). 

Features
Highest light sensitivity with up to 50 photons/cm² per second
Variable heated sample holder with Tmax of 350 °C and gas purging
Dynamic and isothermal tests
Recording of full CL spectrum
Considerable advantages over dynamic differential scanning calorimetry

In today's polymer industry, characterization of the oxidation content of polymers and the resistivity to oxidation when antioxidants are added is an important part of quality control.

With chemiluminescence it is possible to analyze polymers and other organic substances in this respect. Chemiluminescence or CL is a physical phenomenon which is caused by chemical reactions. Compounds which are transferred into an excited state by chemical reactions relax back to their ground state under the emission of light. Submitted to normal ambient conditions, most materials show chemiluminescence as consequence of oxidation reactions.

Normally, the CL signal of a sample is weak. By using a highly sensitive photomultiplier tube (PMT) with a sensitivity of up to 50 photons/cm² per second, the Tohoku CL analyzer guarantees maximum quantum yield.

Typically, dynamic differential scanning calorimetry is used for oxidation characterization though chemiluminescence has some advantages over this technique. The main advantage is that experiments can be performed at low temperatures below the melting point of the sample. This allows both OIT and OOT to be determined without destroying/melting the sample. In addition, our CLA oxidation analyzer allows the determination of the initial oxidation content of the sample.  So chemiluminescence is an attractive alternative to dynamic differential scanning calorimetry.

Main benefits of chemiluminescence:

  • Evaluation of the initial oxidation state and oxidative stability
  • Determination of oxidation induction time OIT and oxidation induction temperature OOT
  • Direct measurements of peroxides
  • Multiple measurements; sample imaging via CCD camera
  • Detection of active oxygen, micro analysis with high sensitivity
  • Monitoring of sono and physiological luminescence processes

Advantages over dynamic differential scanning calorimetry (DSC)

  • DSC requires higher temperatures and degradation of the sample
  • Determination of OIT and OOT at low temperatures and in early stages
  • Determination of the oxidation level of the sample
Oxidation of polymers, colors and rubber
  • Stability forecast of newly developed materials in R & D
  • Control of incoming substances and materials
  • Quality control
  • Determination of the optimal state for the forming process
  • Characterization of recycled materials
Oxidation of oils, foodstuffs and chemicals
  • Durability analysis
  • Product quality control
  • Shortens development time
Microanalysis

Detection of peroxides, hydroperoxides, hydrogen peroxides etc. with highest sensitivity (femtomol, ppb level)

Ultra-sensitive fluorescence analysis

for example in cancer research and surface analysis

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