The Application Notebook 09-01-2020

In general, many Raman measurements suffer from fluorescence, which forces the use of longer excitation wavelength (lower photon energy) lasers to prevent the fluorescence signal from overwhelming the Raman signal. However, this results in reduced sensitivity of low-cost silicon CCD detectors at higher wavenumbers, making it difficult (or impossible) to observe the “stretch” portion of the Raman spectra.

The Oxigraf state-of-the-art Oxygen Deficiency Monitor, the Model O2iM, is a responsive, accurate, and reliable safety monitor for oxygen displacement monitoring in quantum computer laboratory, MRI, NMR, and liquid nitrogen and helium storage facilities. Our reliable solid-state sensor does not require routine maintenance or factory calibration, and the O2iM is equipped with an automatic, programmable auto-calibration system. The system easily interfaces with alarm system and building management systems.

This application note demonstrates determining the correct orientation of the polarizer for these measurements and illustrates the importance of polarized measurements in specific examples.

Nebulizer selection is a critical but often overlooked aspect of inductively coupled plasma–optical emission spectroscopy (ICP-OES) analyses. There are many different nebulizers available for ICP-OES, and choosing the optimal one can be confusing and difficult. To achieve peak performance from your ICP, it is essential to choose the proper nebulizer based on your sample types in addition to any necessary accessories to maintain long-term performance. In this study, we compare the performance of Glass Expansion’s most popular concentric nebulizer designs for ICP-OES applications as well as a parallel-path nebulizer from another vendor, providing a complete selection guide based on performance and design.

The concentration of ethanol in hand sanitizer was determined using a calibration developed with an automated ATR sampling accessory.

Material identification, also called positive material identification (PMI), is used to analyze and identify materials for quality assurance and quality control to verify proper alloy or material is being used.

This study describes how Raman imaging and correlative Raman scanning electron (RISE) microscopy can characterize and visualize layer numbers in 2D MoS2 and WSe2 samples.