JEOL Resources

Analysis of gases generated from all solid-state Li-ion batteries using sulfide-based solid electrolytes

Wed, 05 Aug 2026 12:06:04 GMT

MSTips No. 351

Understanding the gases generated inside a rechargeable battery when it is in use is considered in terms of performance maintenance and quality control. By using an experimental battery from which internally generated gases can be extracted, it is possible to identify the gas species generated and estimate changes in the amount of gas generated, although this is different from the actual operating environment of the battery, which is an enclosed space. 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.

Analysis of calcium oxalate and polystyrene in oxidizing atmosphere using high-resolution TG-TOFMS

Wed, 05 Aug 2026 12:03:35 GMT

MSTips No. 350

Thermogravimetric-mass spectrometry (TG-MS) is a measurement technique for obtaining weight change and qualitative information of evolved gas during heating. It is used to evaluate resins and synthetic rubber products. Usually, the inert gas such as helium and nitrogen are used as the TG atmosphere gas. On the other hand, oxidizing atmosphere measurement such as the air will be effective for product development and quality control. However, the electron ionization (EI) method, which is a standard ionization method, is difficult to analyze for a long time under oxygen due to deterioration of the filament. We have developed an oxygen-resistant filament to solve this issue. 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.

Improving efficiency in drinking water analysis by high-end GC-QMS ~ Scan quantification of VOCs, 2-MIB & Geosmin, haloacetic acids, formaldehyde, Phenol by double column connection

Wed, 05 Aug 2026 12:01:28 GMT

MSTips No. 346

Of the drinking water quality standards in Japan, the GC-MS method is adopted as the inspection method for 19 test items. The 19 test items covered by the GC-MS method are classified into 5 groups as volatile organic compounds (VOCs), substances causing musty odors (2-methylisoborneol, geosmin), haloacetic acids, formaldehyde, and phenols. One or more official methods have been established for each group. We already have reported an analysis application using the same column for the purpose of improving operational efficiency in these water quality analyses. The same column analysis of VOCs, 2-MIB, and geosmin using a mid-polar column was reported in MSTips No.334. The same column analysis of haloacetic acids, formaldehyde, and phenols using a non-polar column was reported in MSTips No.325.

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.

Generated gas analysis of styrene-butadiene rubber using high-resolution TG-TOFMS (2)

Wed, 05 Aug 2026 11:57:48 GMT

MSTips No. 344

Styrene-butadiene rubber (SBR) is used in a variety of products, including automotive tires, industrial products, and negative electrode binder materials for lithium batteries. Many synthetic rubber products, including SBR, contain various additives such as vulcanization accelerators, and information on the gases produced by heating is extremely important for evaluating product properties, quality, and safety. Thermogravimetric-Mass Spectrometry (TG-MS) is effective for the analysis of synthetic rubber because it is possible to correlate and obtain on the mass change and qualitative information on the generated gas when heating is applied. On the other hand, since this method does not use chromatogram separation, many rubber pyrolysis products (mainly hydrocarbons) make it difficult to analyze trace components. Therefore, mass separation by high-resolution TOFMS JMS-T2000GC was performed and useful results were obtained. 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.

Generated gas analysis of styrene-butadiene rubber using high-resolution TG-TOFMS (1)

Wed, 05 Aug 2026 11:55:44 GMT

MSTips No. 343

Styrene-butadiene rubber (SBR) is used in a variety of products, including automotive tires, industrial products, and negative electrode binder materials for lithium batteries. Many synthetic rubber products, including SBR, contain various additives such as vulcanization accelerators, and information on the gases produced by heating is extremely important for evaluating product properties, quality, and safety. Thermogravimetric-Mass Spectrometry (TG-MS) is effective for the analysis of synthetic rubber because it is possible to correlate and obtain on the weight loss and qualitative information on the generated gas when heating is applied. On the other hand, since this method does not use chromatogram separation, many rubber pyrolysis products (mainly hydrocarbons) make it difficult to analyze trace components. Therefore, mass separation by high-resolution TOFMS JMS-T2000GC was performed and useful results were obtained. While this report presents the results of the EI method, MSTips 344 reports the results of the Electron Capture Ionization (ECI) method.

Analysis of dioxins in food and feed by using New JMS-TQ4000GC and software "TQ-DioK"

Wed, 05 Aug 2026 11:53:14 GMT

MSTips No. 339

Dioxins are considered as persistent organic pollutants (POPS) due to their presence in the environment and the health risks associated.
A World Health Organization (WHO) study has demonstrated the health risks (carcinogenic and immunotoxic) when population are exposed to them. In addition, dioxins have been regulated by the Stockholm convention on POPs in May 2001. In particular, 17 substances have to be monitored. The highest toxic compound is the 2378-TeCDD. Currently, dioxins analysis can be done not only using GC-HRMS but also with GC-MS/MS according to European commission regulation (EU589/2014). Recently, JEOL has developed a new GC-triple quadrupole MS (JMS-TQ4000GC) and a new dedicated dioxins analysis software called TQ-DioK.
In addition, we have already introduced dioxins analysis result by using standard sample (MSTips338). In this study, we evaluated JMS-TQ4000GC with TQ-DioK using food samples.

Dioxins analysis by New JMS-TQ4000GC and software "TQ-DioK"

Wed, 05 Aug 2026 11:50:35 GMT

MSTips No. 338

Dioxins are a general term for polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs). Their structures consist of two chlorinated rings. Many congeners differ in terms of number of chlorine atoms and binding sites (Fig. 1). These substances are considered as persistent organic pollutants (POPS) due to their presence in the environment and the health risks associated. A World Health Organization (WHO) study has demonstrated the health risks (carcinogenic and immunotoxic) when population are exposed to them. In addition, dioxins have been regulated by the Stockholm convention on POPs in May 2001. In particular, 17 substances have to be monitored because they are regulated (7 PCDDs and 10 PCDFs). The highest toxic compound is the 2378-TeCDD. Currently, dioxins analysis can be done not only using GC-HRMS but also with GC-MS/MS according to European commission regulation (EU644/2017). Especially, GC-triple quadrupole MS is interesting in terms of handling, instrument size and operating costs. Recently, JEOL has developed a new GC-triple quadrupole MS (JMS-TQ4000GC) and a new dedicated dioxins analysis software called TQ-DioK. In this study, we evaluated JMS-TQ4000GC with TQ-DioK using dioxins standard samples.

Effect of JMS-T2000GC high mass resolution on the analysis result−KMD Plot comparison using msRepeatFinder

Wed, 05 Aug 2026 11:42:27 GMT

MSTips No. 332

Recently, JEOL announced the release of the JMS-T2000GC "AccuTOF™ GC-Alpha", which is the 6th generation GC-HRTOFMS in the JEOL "AccuTOF™ GC" series. The GC-Alpha achieves three times higher mass resolving power (10,000→30,000 @ m/z 614）and three times higher mass accuracy (3ppm→1ppm, EI standard ion source) than the previous model. In this work, we used direct probe field desorption (FD) of crude oil (a very complex mixture) to monitor the effects of improved resolution. Additionally, the JEOL msRepeatFinder software was used to examine the crude oil data by using Kendrick mass defect (KMD) plots in order to more clearly visualize the effects of improved mass resolution on the analysis results.

Effect of high mass accuracy on the analysis result by JMS-T2000GC−Effect to narrow down the result of msFineAnalysis integrated analysis

Wed, 05 Aug 2026 11:39:33 GMT

MSTips No. 331

JEOL Ltd. recently announced the JMS-T2000GC "AccuTOF™ GC-Alpha" which is the 6^th generation GC high resolution time-of-flight MS (GC-HRTOFMS) in the "AccuTOF™ GC" series that was first released in 2004. The GC-Alpha (Fig. 1) represents a significant improvement in capabilities over the previous model with three times higher mass resolving power (10,000→30,000 @ m/z 614）and three times higher mass accuracy (3ppm→1ppm, EI standard ion source). In this work, we used the thermal decomposition of an acrylic resin to evaluate how improved mass accuracy can affect the analysis results for a complex sample. Additionally, the msFineAnalysis Version 3 software included with the JMS-T2000GC was used to quickly determine the impact of improved mass accuracy on the qualitative analysis results.

Analysis of degraded polystyrene by UV irradiation using high-resolution MALDI-TOFMS and pyrolysis-GC-QMS

Thu, 30 Jul 2026 18:51:47 GMT

MSTips No. 322

Polymers can be degraded by the effects of light, oxygen, heat, etc. so it is important to understand how the polymer structures change during degradation. Pyrolysis gas chromatograph quadrupole mass spectrometer (Py-GC-QMS) and matrix-assisted laser desorption/ionization time-of-flight mass spectrometer (MALDI-TOFMS) are powerful tools for analyzing polymeric materials. Py-GC-QMS is a method that instantaneously heats a sample with a pyrolyzer and then analyzes the pyrolysis products by GC-MS. Since most of the pyrolysis products are related to monomers and dimers, this technique allows for easy identification of the polymer substructures which is useful for identifying changes to the polymer when degradation occurs. MALDI-TOFMS involves a soft ionization technique that can directly ionize and analyze the intact polymer molecules and often produces singly-charged ions even for high molecular weight compounds. As a result, the m/z axis of the mass spectrum is equal to the mass of the ions, thus making it easy to interpret polymer distributions. Additionally, when MALDI is used with a high-resolution TOFMS, the accurate mass of each ion in the polymer series can be used to calculate their elemental compositions. Moreover, the molecular weight distribution of polymers can be calculated from the ion intensity distribution. In this work, we used Py-GC-QMS and high-resolution MALDI-TOFMS to evaluate the effects of UV irradiation on polystyrene (PS).