Analytical Instrument Documents

In this work, we examine the effects of nitrogen carrier gas on the performance of our GC-TOFMS for high resolution, accurate mass analysis.

In the fall of 2019, SpiralTOF™ was renewed to "SpiralTOF™-plus" with enhanced mass spectrometry imaging capabilities while maintaining the feature of high mass-resolving power. This report introduces the features of SpiralTOF™-plus and its advantages in actual analysis.

We have attempted a rapid analysis of Py-GC/MS method using JMS-Q1500GC by optimizing Py and GC oven conditions, and achieved a cycle time of 14.75 min per measurement. Here, we report the results.

In this application note, we identified the additives and their distribution within a commercially available molded polymer by using GCxGC/HRTOFMS with pyrolysis (PY/GCxGC/HRTOFMS).

Qualitative analysis by combined gas chromatography and mass spectrometry (GC-MS) generally relies on database searching for electron ionization (EI) mass spectra. However, the molecular ion may be weak or absent in EI mass spectra. Chemical ionization (CI) is a widely used soft ionization method that can often provide molecular weight information that is lacking in the EI mass spectra. JEOL msFineAnalysis iQ software makes use of the integrated information from both EI and soft ionization GC-MS data for confident qualitative analysis.

The AccuTOF-DART Ambient Ionization Toolbox™ provides a variety of ambient ionization methods for rapid and convenient analysis of diverse compound types. Here, an isotopically labeled peptide was purchased from a vendor at a suspiciously low price. Inlet ionization with 3-nitrobenzonitrile matrix revealed that the sample did not contain the expected 13C and 15N labels. A separate sample of the isotopically labeled peptide from an alternate supplier showed the expected labeling.

DEP (Direct Exposure Probe) is a technique in which a sample is directly applied to a platinum filament at the tip of the probe and rapidly heated by applying an electric current to the filament. This method enables rapid ionization while minimizing thermal decomposition of the sample, thus requiring little to no complex sample pretreatment and making it suitable for the analysis of nonvolatile substances or those prone to thermal decomposition. In this study, therefore, a direct introduction method using DEP was applied, and the results of rapid qualitative analysis of organic pigments contained in the pigmented layer of an indoor line tape are reported.

In this study, a case was examined in which indoor line tape used for approximately eight months exhibited a degradation phenomenon where the color of the pigmented layer disappeared due to the influence of oblique light. The objective was to evaluate this oblique light-induced degradation and to clarify its underlying causes. For the evaluation, qualitative analysis of the substrate layer and adhesive layer constituting the tape was first carried out using the direct EGA-MS (Evolved Gas Analysis–Mass Spectrometry) method. This technique enabled direct detection of thermally decomposed products from each constituent layer, allowing for characterization of the material composition.

In this study, pyrolysis (Py)/GCxGC/HR-TOFMS system was applied to investigate the pyrolysis products of Vinylpyridine and Divinylbenzene copolymer as the ion exchange resin sample.

In this study, pyrolysis(Py)/GCxGC/HR-TOFMS system was applied to investigate the pyrolysis products of Ethylene-propylene–diene rubber (EPDM).