Analytical Instrument Documents

Recently, it has been possible to efficiently overview the information in the mass spectra of complex polymer mixtures using a Kendrick Mass Defect (KMD) analysis software, msRepeatFinder. Determining the elemental composition of the end groups of the polymer series identified in this way is essential for confirming the state of polymer synthesis reactions, quality control of products, and analysis of degradation mechanisms. In this report, we introduce the procedure for determining the elemental compositions of the end groups from the accurate mass information of the polymer.

In MSTips No. 355, the effectiveness of the FD method in additive analysis was shown using an analysis example of bromine flame retardant in polypropylene products. In this report, we introduce an analysis example of molybdenum dithiocarbamate (MoDTC), which is a friction reducing agent for lubricating oil.

This report shows the result of analysis for two types of polypropylene (PP) products. The difference between sample was not found by the pyrolysis method, but a brominated flame retardants was found as a difference by the FD method.

By gradual heating, unlike Py/GC/MS, moderately fragmented oligomer components can be analyzed by DART-MS. Some of the oligomer components generated include the end group structure by single cleavage of the main chain, which helps to analyze the structure of the polymer. Here, an analysis example of polyphenylene sulfide (PPS) using TDP-DART-MS is reported [2]. PPS is an engineering plastic with excellent heat resistance and chemical resistance. It is important to analyze the structure of the end groups because the difference in the manufacturing method appears in the end groups. However, it was difficult to analyze the end groups of PPS because it is insoluble in general organic solvents.

In this study, it was hypothesized that material degradation under oblique-light conditions would affect the composition and release behavior of outgassed components. Accordingly, differential analysis of outgassed components before and after oblique-light degradation was carried out using thermal desorption–GC/MS.

To more comprehensively evaluate the oblique-light degradation characteristics of indoor line tapes, qualitative analysis of outgassed components was performed using thermal desorption–GC/MS. As a result, compounds presumed to originate from migration from the floor surface materials were detected. To ensure the validity of the evaluation results, these migrated components were assessed prior to the oblique-light degradation study, and the findings are presented below.

In this paper, we focus on the gases generated during the charging and discharging of all-solid-state batteries and present an example of analysis using a mass spectrometer.

We have introduced the oxygen-resistant filament application note for QMS in MSTips No. 320. In this MSTips, we introduce anti-oxygen filament application data for high-resolution TOFMS.

JEOL Ltd. released the 6th generation high-end GC-QMS "JMS-Q1600GC UltraQuad™ SQ-Zeta" in 2021. We report on the construction of a system that enables measurement of all GC-MS items of water quality standards with a single instrument using the JMS-Q1600GC. The system can measure all test items without the need for column replacement by connecting a mid-polar column and a non-polar column to one JMS-Q1600GC in a double column configuration. In addition, by using the new attachment "High-Performance Ion Source (EPIS)", an easier "Scan quantification" is possible instead of the "SIM quantification" that requires complicated condition settings. This MSTips reports the results of the evaluation of the linearity of the calibration curves for each item and the repeatability at a lower concentration limit.

Results using the EI method are reported in MSTips 343. In this report, we describe a highly sensitive negative ion measurement method by TG-MS using the Electron Capture Ionization (ECI) method. In addition to selective detection of molecular ions, which is a feature of the soft ionization method, the ECI method can selectively detect oxygen, sulfur, and various halogen compounds with high electronegativity, a feature of the negative ionization method. Therefore, the ECI method is considered to be effective for the analysis of trace constituents.