An IICA Tech Night presentation Part 1 To see the sections covered in this video please scroll down. Presentation summary Light interacts with a product's organic molecules causing variations in light absorption. The transmitted or reflected light can be measured with a spectrometer and the resultant spectral signature used to qualify or quantify properties of the product. The discussion will include - how light interacts with molecules, characteristics of the different electromagnetic spectral bands, in-line hardware required to collect light, and fundamentals of chemometrics. Presenter -- Gary Brown Gary Brown is one of the principle engineers with Australian Innovative Engineering and has spent the last 12+ years developing in-line instrumentation using NIR spectroscopy to measure properties of fresh fruit. He is now concentrating his efforts in applying the technology for in-line product authentication for the food and pharmaceutical industries For more information on test and measurement solutions or equipment please visit our website or follow us: Website: http://www.techrentals.com.au LinkedIn: http://www.linkedin.com/company/techrentals Twitter: http://twitter.com/techrentals Google+: http://www.google.com/+TechRentals Place on the Electro Magnetic Spectrum (0:47) How light is used (1:33) Glucose Water Spectra (3:11) Regions of Spectroscopy (4:02) Molecular Spectroscopy (6:00) Molecular Groups (7:17) MIR versus NIR (8:01) NIR overtones and combinations (8:36) NIR Region (9:03) Beers Law (9:39) The Beers' Law not perfect (10:37) Better Beers (11:20) Collection of Spectra (11:55) Diffuse reflection (13:50) Interactance (14:38) Beers Law (15:30) How to Measure (16:27) Wavelength Selection (16:59) NIR region detectors (21:05) MIR region detectors (22:15) Transmission of light - Fibre Optics vs. Length (22:34)

• published: 09 Dec 2013
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