Question
Asked 7th Feb, 2020
Lukas Knauth
Lukas Knauth
  • Steinert Unisort GmbH

What are the limits of Raman-Spectroscopy in Polymer-/Waste Detection?

Is Raman-Spectroscopy equaly limited in the detection dark/black materials as NIR-Spectroscopy?
Are there already Raman-Spectrometers with HSI (Hyperspectral Imaging) like possibilities available?
Raman Spectroscopy
Hyperspectral Imaging
Spectroscopy, Near-Infrared
Waste
Near Infrared Spectroscopy

All Answers (2)

Jp Wu
CBRE
From my experiences, dark/black materials generally showed extremely strong fluorescence to make measuring Raman signals impossible.
Cite
Ludovic Duponchel
Université de Lille
Is Raman-Spectroscopy equaly limited in the detection dark/black materials as NIR-Spectroscopy?
Indeed, black samples are often problematic in Raman spectroscopy. Nevertheless we must always try because it is not systematic.
Are there already Raman-Spectrometers with HSI (Hyperspectral Imaging) like possibilities available?
As of this date, there is no hyperspectral imaging system. It's hard to believe that there will ever be one because Raman spectroscopy is really not efficient and we often have to make long acquisitions to get a sufficient signal-to-noise ratio.
Best regards,
Ludovic.
Cite
1 Recommendation

Similar questions and discussions

Hello all,is FT-NIR spectroscopy diffuse refelectance mode used for honey quality analysis including adulteration ?please any one you help me?
Question
3 answers
  • Asked 26th Aug, 2019
  • Teferi DamtoTeferi Damto
I want to analyze the honey quality including adulteration by FT-NIR(Fourier transform near infrared )spectroscopy diffuse refelectance measurement mode .please i need information by any one of you who have experience on this area ?
Can I have done DRS test on thin film Glass substrate by carry 5000 UV-Vis NIR spectroscopy?
Question
2 answers
  • Asked 16th Sep, 2020
  • Yogendra YadawaYogendra Yadawa
Please give the proper answer and how it is performed. Provide a short demo video if as soon as possible.
Looking for large open Database of NIR (Near Infreared Spectroscopy) spectrum of Polymers
Discussion
Be the first to reply
  • Asked 7th Mar, 2021
  • Victor LuidVictor Luid
Hi!
I'm trying to find open database of Polymer's NIR spectrum but the ones I have found are really limited. Could you recommend me any NIR database?
I'm trying to apply a machine learning algorithm for classifying the different types of plastics in the recycling process and it would be very helpful.
Thank you so much!
I am working with near-infrared (NIR) spectroscopy for identifying different materials.To proceed I want to know how near-infrared (NIR) spectroscopy?
Question
1 answer
  • Asked 13th Sep, 2021
  • Keenisha KannanKeenisha Kannan
I need more information on NIR spectroscopy
Is Near Infrared (NIR) Spectroscopy suitable for the accurate determination of moisture in UO2 powder?
Question
6 answers
  • Asked 26th Mar, 2020
  • Balakrishna PalankiBalakrishna Palanki
Traditionally, the Karl Fischer titration has been used for determining the moisture content in UO2 powder samples, for example, as described by Hibbits, 1953 on Google [Attached]. A Metrohm webinar has described the use of NIR spectroscopy for determining the moisture content in pharmaceutical chemicals [ https://www.youtube.com/watch?v=HSKaLZwaJvw ]. First, the moisture content is determined by NIR spectroscopy. Then the same samples are used for determining moisture by Karl Fishcher titration. Then a graph is drawn correlating the two sets of values. Using this graph, only NIR spectroscopy is used for moisture estimation of future samples, dispensing with the Karl Fischer method. Is NIR spectroscopy recommended for UO2 powder as a substitute for Karl Fishcher method?
Can anyone point to a dataset of NIR reflectance measurements on watermelons?
Question
Be the first to answer
  • Asked 29th Aug, 2020
  • Javier Enrique Sanchez Galan FJavier Enrique Sanchez Galan F
I am looking for articles or references to a spectral dataset/database consisting in VIS/Near-Infrared Spectroscopy Reflectance measurements on watermelons for a project.
The dataset can be an open or closed (that the authors need to contacted).
How can we use Vis nir spectroscopy for monitoring water quality at varying qualities?
Question
3 answers
  • Asked 26th Oct, 2019
  • Nativ RotbartNativ Rotbart
Drinking water is heterogeneous and of variable quality. I would like to examine their mineral contents and other water quality parameters themselves. How can spectral changes in the visible and NIR light spectra be monitored? What measures will help me deal with the variability of the water solution rule?
Preprint of first cross-device / cross-software comparison for microplastics measurements: Are we measuring the same metrics?
Discussion
5 replies
  • Asked 22nd Jul, 2021
  • Benedikt HufnaglBenedikt Hufnagl
This preprint compares the most advanced automated commercial analysis approaches for vibrational spectroscopy including Bruker Lumos II in combination with Purency Microplastics Finder R2021a (FPA-FTIR), Agilent 8700 LDIR (QCL) in combination with Clarity, and WITec alpha300 R in combination with Particle Scout.
Its really worth reading.
https://chemrxiv.org/engage/api-gateway/chemrxiv/assets/orp/resource/item/60dc37140783605ce14cda1c/original/automated-analysis-of-microplastics-based-on-vibrational-spectroscopy-are-we-measuring-the-same-metrics.pdf

Related Publications

View
Detection and Quantification of Adulterants in Roasted and Ground Coffee by NIR Hyperspectral Imaging and Multivariate Curve Resolution
Article
Full-text available
  • Jan 2020
In this work, a methodology was proposed for detection and quantification of the four main roasted and ground coffee adulterants: coffee husks, roasted and powdered corn kernels, wood sticks, and soil, based on the combination of near-infrared hyperspectral imaging and multivariate curve resolution (MCR). By using this procedure, it was possible to...
View
View
Got a technical question?
Get high-quality answers from experts.
Ask a question