نتایج جستجو برای: infrared spectrometer
تعداد نتایج: 123942 فیلتر نتایج به سال:
We present a new design of robust cavity-enhanced frequency comb-based spectrometer operating under the continuous-filtering Vernier principle. The is based on compact femtosecond Er-doped fiber laser, medium finesse cavity, diffraction grating, custom-made moving aperture, and two photodetectors. removes requirement for high-bandwidth active stabilization in previous implementations technique,...
We report a microfluidic device, using segmented flow in a two-phase system of immiscible liquids, which delivers aqueous droplets into a modified commercial mass spectrometer. The interface coupling the microfluidics to the mass spectrometer achieves up to 96% sample transfer efficiency to the vacuum chamber. Sample ionization is assisted by multipass infrared laser beam in the interface. The ...
Introduction The Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) is a very high resolution near infrared spectrometer currently orbiting Mars on board the Mars Reconnaissance Orbiter (MRO). Since each mineral has a unique spectral signature, it is possible to use the measurements from this instrument to identify minerals on the surface of Mars. This project describes a method[1] to...
General H NMR and C NMR spectra were recorded with a JEOL JNM-Alice 400 spectrometer (400 MHz and 100 MHz, respectively). Chemical shifts are given in parts per million (δ) downfield from internal tetramethylsilane. Infrared spectra were obtained with a Perkin-Elmer FT-IR (Model 1600). Both conventional and high resolution mass spectra were recorded with a JEOL JMS-DX303HF spectrometer. GC Mass...
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