Analytical Instrument Documents

The blank‑tube FI (Field Ionization) method introduces a sample into the GC inlet, passes it through a blank tube, and detects it by FI soft ionization. This method enables detection of molecular ions within less than one minute. When hydrocarbon mixtures such as oils are analyzed, complex mass spectra containing multiple molecular ion peaks are obtained. For their interpretation, Kendrick Mass Defect (KMD) analysis in the polymer‑analysis software msRepeatFinder is effective. In addition, difference analysis function is useful for extracting subtle differences between samples. In this MSTips, commercial oil and experimentally prepared model oil were analyzed. The results obtained from difference analysis are introduced.

In this application note, labeled N‑linked glycans (Fig. 1) were analyzed using the JMS‑S3000, and results of accurate mass measurements in the SpiralTOF mode and structural analysis in the TOF‑TOF mode are presented.

In this application note, dipeptides extracted from natto were analyzed. The results of amino acid composition analysis using the SpiralTOF mode and structural analysis using the TOF‑TOF mode are reported.

This report presents an example of the rapid, simultaneous analysis of these musty odor compounds using the SPME-GC-MS/MS method. Solid Phase Microextraction (SPME) is a technique in which a fine, polymer-coated fiber is exposed to the sample water (or its headspace) to adsorb and concentrate target components. We evaluated the detectability at a concentration of 1 ppt using standard samples, as well as the linearity of the calibration curves for quantification and the repeatability at the lower limit of quantification.

Pyrolysis‑GC‑MS provides structural information on substructures originating from monomers and end groups. While many detected pyrolysis products are not registered in the NIST library, automated analysis be achieved using AI structure analysis with msFineAnalysis AI.

In this report, we attempt to improve the image quality of extracted mass images using the FINE-AI Filter, which was developed by applying a machine-learning model for noise filtering—originally created from secondary electron images obtained by scanning electron microscopy (SEM)—to MALDI-MSI.

In this report, we attempted end group analysis using high-precision MALDI-TOFMS after SEC fractionation of polycarbonate (PC) with high polydispersity.

This report introduces a phase analysis method using vertex component analysis (VCA). Furthermore, a machine learning-based noise reduction method (FINE-AI Filter) was applied as a preprocessing step.

This is a compendium of organic chemistry related applications notes and JEOL News articles based on the data acquired on JEOL ultra-high mass-resolution MALDI-TOFMS JMS-S3000 SpiralTOF™ series.

msFineAnalysis iQ is automated qualitative analysis software for JEOL JMS-Q1600GC and JMS-TQ4000GC gas chromatograph-quadrupole mass spectrometers that combines EI mass spectral library database (DB) searching, retention index (RI), automatic molecular ion confirmation using soft ionization (SI), and isotopic pattern analysis on the molecular ion for a new type of qualitative analysis called "integrated qualitative analysis".