Measurement of broadband spectrum using automatic wide range measurement system

Generally, Mid-IR spectroscopy (4000~400 cm-1) is widely used for qualitative and quantitative analysis of the substance (mainly organic substance), since the information on normal vibration and rotation of molecule can be obtained. Apart from this, Near-IR spectroscopy (15000~4000 cm-1) utilizing overtone and combination tone is used with a focus on the non-destructive quantitative analysis of food, drug and various industrial products, and Far-IR (Terahertz) spectroscopy (400~10 cm-1) using stretching and lattice vibration between heavy atoms is used with a focus on the quantitative analysis of inorganic substance and crystal structure analysis. One spectrum in Mid, Near and Far-IR range can be measured using a single FTIR instrument by changing four elements such as light source, detector, beam splitter (BS) and windows. Namely, one FTIR instrument enables to obtain the information on overtone, combination tone, lattice vibration as well as normal vibration for overall evaluation of a sample. This time JASCO has developed the automatic wide-range measurement system which can be incorporated in FT/IR-6000 series to measure in the range from Near-IR to Far-IR fully automatically. FT/IR-6000 series are originally equipped with the automatic switching system for light source and detector, and automatic wide-range measurement system provides automatic switching for BS and windows.

In this report, the details of the system and measurement example using automatic wide-range measurement system are illustrated.