| Author | Message | ||
     Lura Peters |
I currently am working in FTIR but have had several request to develop the NIR technique for the analysis of polymer density (sample would be in the powder form) as well as applications for solutions. These studies would be research analyses and not in-line monitoring. We currently have a Matteson research series spectrometer but I am considering the upgrade of a Nicolet Magna 550 to do NIR analysis. My understanding of the technique is very vague and I can use all of the basic information that I can get. As far as sample prep what are the different ways to analyze samples (i.e. can I use a diffuse reflectance accessory used in Mid IR analyses for NIR?) Any information would be greatly appreciated. | ||
| Shihying Chang |
We (Orbital/Analect FTIR)had some experience while developing process implementations for those FTNIR applications. The DRIFT device for MIR is not appropriate for NIR aplication. Even for MIR range there are a series of signal repeatability problems associated with the traditional DRIFT device. Integrating sphere may have its own problems of stray light and practical implementations. You may easily get a density accuracy (reference to lab NMR measurements)in the range of 0.001 or better for polyolefins (density ca. 0.910 to 0.970) from a lab FTNIR setup. However, validation and repeatability will be challenging. Good luck. | ||
| Tony Davies (Td) |
Lura, Do you want to come on an NIR training course? NIR Publications is running one of our regular courses in Chichester, UK from 1st to 3rd May. I agree with the above comments. I would also advise caution concerning upgrading old instruments to do NIR spectroscopy. You need to discuss it with the experts at Thermo Nicolet. Good luck, Tony | ||
| Lars Axrup |
Lura, We have used a Nicolet Magna 560 as NIR for several years now and it works perfect. You need the fiberoptic probe and port with PbS detector, a halogen light source and a XT KBR or Quarts beam splitter. The 560 and 550 are essentially the same instruments but the 550 was not made for upgrading. However you can still upgrade the 550 but you have to unscrew the beam splitter instead of just releasing it with a lever. This will blow the warranty but if the instrument is old this is not an issue. The question is if the parts still are available and if they are worth the money compared to the cost of a new FT-NIR instrument Good luck Lars Axrup | ||
| C_Real |
Who know what is "NIRM" and how work to feedstuff? I am earing any about GMO detection by NIRM, is true? Thank a lot Cristian Real H. Biochemist ARIZTIA Co. (CHILE) |