Near IR Spectral Response of Natural Rubber Latex in the Reflectance Mode
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چکیده
The near Infrared (NIR) region of the electromagnetic spectrum extends from the upper wavelength end of the visible region at about 770 nm to 2500 nm (13,000 to 4000 cm"). Absorption bands in this region are overtones or combinations of fundamental stretching vibrational bands that occur in the region of 3000 crnvto 1700 cm". The bonds involved are usually C-H, N-H and O_H'·2 Near-Infrared Reflectance Spectroscopy (NIRS) is an important tool in chemical analysis", It is a secondary technique to obtain primary patterns (a calibration set) to analyze substances" NIRS can be used in a laboratory for routine scanning of samples, but continual monitoring is necessary to ensure accurate results. This system for monitoring is detailed by Shenk et al". Traditionally, NIRS has been used to determine the composition of agricultural products, but today, it is also used in other areas, such as the oil industry, pharmaceuticals, polymers, food industry, and clinical
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