Analytical Instrument Documents

Electron Spin Resonance (ESR) method is a useful technique which can detect polarons and trapped radicals as a change of magnetic moments, sensitively and selectively. In contrast, Electrically Detected Magnetic Resonance (EDMR, as shown in Fig. 2(b)) can selectively detect electron spins related to recombination currents, which are associated with device performance.

We present an example of defect structure evaluation based on the angular dependence of ESR signals. In silicon crystals, the resonance magnetic field and the g-value of an ESR signal vary with the orientation of the external magnetic field relative to the crystal axes ([100], [110], [111], etc.). Analysis of this angular dependence provides valuable information about the symmetry and electronic structure of vacancy-related defects. Here, we measured the angular dependence of the g-value by varying the direction of the applied magnetic field using a silicon single crystal oriented along the [111] direction.

In this report, we analyzed the oligomer region of the same samples using a high-resolution MALDI-TOFMS JMS-S3000 "SpiralTOF™-plus 2.0" in combination with Kendrick Mass Defect (KMD) analysis.

In this application, we report the analysis of off-flavor components in natural rubber by using HS-GC/MS/MS.

In this report, we performed structural analysis of the end groups of poly(methyl methacrylate) by using MALDI-TOFMS and pyrolysis GC-TOFMS in a complementary manner.

This application note reports the syringe sampling procedure, and measurement results of example compounds that are sensitive to heat and light.

In MSTips No. 333, we reported the measurement results of anionic surfactants less than m/z 1000. In this application note, we report the measurement of polyethylene glycol (average molecular weight 5000) having phosphate groups as an end group.

In this report, simazine and thiobencarb, pesticides subject to environmental standards for water pollution, were measured with hydrogen carrier gas. The results show good linearity of the calibration curve and reproducibility at the lower limit of quantification.

In this application note, two types of commercially available PET resins are analyzed by reactive pyrolysis GC-TOFMS and NMR, and the results of analysis to determine whether they are PET or G-PET are reported.

Here, we will report on the binary copolymer search function newly added to msRepeatFinder V6 and the resulting compositional analysis of EO-PO copolymers using the degree of polymerization plot.