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NIR Sensor Technology-Spectroscopy

NIR Sensor Technology-Spectroscopy. Moving Grating-Scanning Monochromator AOTF MEMS FTIR Filter Photometer Fixed Grating-Diode Array. Acquisition Time. FTNIR ~ 8 seconds AOTF~10 seconds NIR Diode Array~1 sec or less Scanning Monochromator~30 seconds 50 X 20 msecs = 1 sec

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NIR Sensor Technology-Spectroscopy

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  1. NIR Sensor Technology-Spectroscopy • Moving Grating-Scanning Monochromator • AOTF • MEMS • FTIR • Filter Photometer • Fixed Grating-Diode Array

  2. Acquisition Time • FTNIR ~ 8 seconds • AOTF~10 seconds • NIR Diode Array~1 sec or less • Scanning Monochromator~30 seconds • 50 X 20 msecs = 1 sec In presentation by Martin Warman, Pfizer, Inc. at IFPAC 2004

  3. Types of NIR Spectrometers • Scanning Devices • Moving Grating-Scanning Monochromator • AOTF • MEMS • FTIR • Non-Scanning Devices • Filter Photometer • Fixed Grating-Diode Array

  4. Multiple-sensor detection (CCD’s, diode arrays) An avenue to avoid interference and ambiguity

  5. Sample • For the following unit operations: • Blending • Coating • Drying • Granulation • Roller Compaction • On-Line Content Uniformity • The Sample is Moving!

  6. Resolution & Spectral Range • How much resolution do you need? • What are spectral signatures of the materials you are looking at typically in the NIR spectral range? • What spectral range is adequate?

  7. NIR Diode Array Specifications Standard InGaAs – 1.7 micron * Most popular choice

  8. NIR Diode Array Specifications Extended InGaAs – 2.2 micron * Most popular choice **Not readily available

  9. Other Desirable Features • Ruggedness • Diode Array spectrometers have no moving parts • Ease of use • Low Maintenance

  10. Unique Features of CDI NIRS • Automated built in references for wavelength and amplitude, can add customer specific references • Do not have to remove from vessel to do OQ, can be done on the fly, even during experiment • Meets USP 1119 specifications-generates report • Dual redundant light source • All in one package, Class I Div II, EP available

  11. Cost Speed of Acquisition Robustness Index fti fti 1998 1998 Richness of data Ease of use Instrument Rating PentagonScore: 0 = low; 5 = high

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