I"d appreciate if someone work in microplstics can recommend the best cost-effective method for identifying the polymer types in microplastics. There is no access to a micro FTIR and throu7gh have access to a Raman, still, very difficult to get it to read due to the minute size of the MPs.
Dear R. R. M. K. P. Ranatunga, the following documents deal with major techniques for détection and analysis of microplastics. My Regards
https://doi.org/10.1039/C6AY02558G
https://doi.org/10.1016/j.trac.2018.10.029
10.1039/C6AY02558G
https://doi.org/10.1021/acsomega.9b00222
https://enveurope.springeropen.com/articles/10.1186/s12302-020-00358-x
Dear Abdelkader BOUAZIZ , thank you so much for sharing these documents which I already follow similar protocol as NOAA. But the issue is since MPs are too small that FTIR or even Raman can not detect them.I know the best solution is FTIR with the attached microscope which not available locally
Hi,
Raman spectroscopy is widely used to identify families of plastics in sediments, oceans and marine organisms. The success of the identification depends essentially on the color of the particles: black or transparent particles are often not identified by Raman as plastic. Gas pyrolysis-chromatography coupled with mass spectrometry (Py-GC/MS) is used to characterize the chemical structure of particles. The structure of these particles is determined using the composition of the thermal degradation products obtained on the pyrogram. The analysis of the plastic polymers was carried out after a step of extraction and visual sorting of the particles from the matrix.
Other equipment and other techniques allow the identification of plastic polymers and can be used for the identification of microplastics. Among these methods are : thermogravimetric analysis performed on a solid phase coupled with a thermal desorber coupled with a GC/MS (TED-GC/MS), thermogravimetric analysis coupled with differential scanning calorimetry (TGA-DSC), liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS), elemental analysis coupled to isotope ratio mass spectrometry (EA-IRMS), time-of-flight secondary ionization mass spectrometry (TOF-SIMS), and SEM-EDS.
With my best regards
Hi,
For qualitative and quantitative analysis, it is also possible to use 1H NMR spectroscopy. The realization of a 1H NMR spectrum is generally simple and fast (a few minutes of acquisition). For more details, please see attached document.
With my best regards
Thank you so much dear prof Doufnoune RACHIDA Rachida for providing a wide variety of options to look for. Reall appreciate that and need a check for instrument availability around and will get back if further details needed.
With best regards
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