Hamamatsu is a major manufacturer and supplier of components needed to build analytical instruments, such as spectrometers. Numerous types and designs of such devices exist, with setups for infrared absorption/emission, Fourier-transform, and Raman spectroscopy being popular. Common to these three spectroscopic techniques is the requirement that the setup has a source of light: a broadband IR source for the former two and a laser for the latter. Additionally, the setups require an IR photodetector or image sensor. The choice of the photodetector depends on the detection mode (point-detection versus image sensing) and the wavelength range.
Although also employed to determine the chemical composition of the sample, the operating principles behind mass spectrometry differ from those in the traditional light-based spectroscopy. The traditional light-based spectroscopy is non-destructive: the information about the sample comes from the way it interacts with light. The objective of mass spectrometry is the elemental composition of the sample (what atoms the sample is made of); thus, before the analysis, the sample is vaporized – if not already a gas – and then ionized. The resulting ions can then be, for example, spatially separated depending on the mass-to-charge ratio of the ions, leading to the chemical identification of the ions. It is a common practice to combine mass spectrometers with gas and liquid chromatographs. Hamamatsu supports manufacturers of mass spectrometers by providing ionizers and ion detectors.
Below learn more details of different spectroscopic techniques and find associated product solutions for each.
Fourier Transform Infrared (FTIR) remains a popular technique in IR spectroscopy. Transmitted/reflected light from a sample creates an interferogram, which is converted to spectra. Data spans across many wavelengths and is well suited to characterize unknown samples or analyze multiple species.
IR radiation is used to probe solid, liquid, and gaseous samples for components that are undetectable in the visible range as well as provide information on component concentrations.
Mass Spectrometry is a widely used analytical technique that identifies and quantifies a substance. By ionising the atoms and molecules of a substance and measuring its mass number and number of ions, its mass-to-charge ratio can be calculated. Compared to other analytical techniques, this allows for a great deal of information to be collected from a single analysis.
The intensity of inelastically scattered light provides molecular information useful for identifying and differentiating chemical compounds and their isotopes.
Several light-based methods can be used to inspect and measure water quality.
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