Near infrared (NIR) spectroscopy

Last changed: 30 May 2016

Near infrared (NIR) spectroscopy is a technique that measures harmonics from the IR region. NIR has a relatively large sample penetration depth so little or no sample preparation is needed. The measurement is rapid (typically 0.5 - 4 min) and some devices can also be used in the field. The technique can be used on all biological and clinical materials and it is also possible to measure inorganic materials (geological and archaeological specimens). Typical measurements on organic materials are: food, feed, biomass, biofuel, clinical samples, pharmaceutical and environmental samples.

BTK has access to a number of NIR spectrometers that enable different measurement techniques

* Foss 6500, fiber optic probe 400-2500 nm and rotating measuring cell for reflection/transflection 400-2500 nm

* Tec 5, fiber optic probe for both transmission, transflection and reflection 300 to 2200 nm

* Perten, rotating sample holder for reflection 950-1650 nm

* GetSpec with integrating measurement cell 912-1709 nm

NIR hyperspectral imaging: BTK has access to a Matrix NIR InGaAs camera with LCTF filter that can take pictures in the size 256x320 pixels at 118 wavelengths (960-1662 nm). Various lenses allowsvarying magnifications. A Sisuchema camera measuring 256x320 pixels at 240 wavelenghths 1000-2500 nm can be made avaialble.

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Paul Geladi, Professor
Department of Forest Biomaterials and Technology, SLU, +46 90-786 87 93, +46 70-270 94 73