JEOL USA Blog

Surface analysis is an analytical technique to elucidate elemental composition, chemical state, and micro structure from material surface layer (several nm to several µｍ). As phenomena such as corrosion, wear, adhesion, and reactions that impact performance and reliability occur primarily on the surface, surface analysis is vital for material evaluation, quality control, and failure analysis.

In this article, we explain the basic principles and analysis methods of COSY and TOCSY, which are representative techniques of 2D NMR. Starting from confirming correlations between adjacent protons using COSY, we introduce spin network analysis with TOCSY and analysis of carbohydrate using 1D and 2D TOCSY, with concrete examples.

NOE (Nuclear Overhauser Effect) is an important NMR measurement technique that can reveal spatial proximity relationships within molecules. In this column, we discuss the difference between difference NOE, 1D NOESY, and 2D NOESY, and how to select each method, the relaxation time that is key for analysis. The causes and solutions for cases when NOE is not detected are also covered. Moreover, we answer the frequently asked questions and explain the key points for effective use of NOE measurement.

In this article, we will explain the structural analysis of organic compound by using 2D-NMR spectrum.

This article provides easy-to-understand explanations about what we can learn from the NMR spectra (chemical shift, integration ratio, and coupling)

Discover how JEOL's pioneering Electron Beam Powder Bed Fusion technology is revolutionizing additive manufacturing, building on over 75 years of innovation in electron microscopy and precision engineering.

Benchtop SEM is used in industry and academia to characterize nanosized particles’ morphological, topographical, and chemical characteristics.

Benchtop SEM is a key analytical tool in investigating materials' batteries, fuel cells, supercapacitors, electrolyzers and heterogeneous catalysts.

Discover how SEM and TEM microscopes are analytical tools that use Energy Dispersive X-ray detectors (EDS or EDX) and SXES for elemental analysis down to Lithium.