Analytical Instrument Documents

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.

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.

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.

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.

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.

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.

In this work, we used Py-GC-QMS and high-resolution MALDI-TOFMS to evaluate the effects of UV irradiation on polystyrene (PS).

When performing simultaneous analysis of pesticide residues in food, there are many items to be set for each compound, and creating new measurement conditions requires a lot of time. In this paper, SRM Compound Data File" and "SRM Optimization Tool" are introduced.

JEOL has developed a filament for low-vacuum that utilizes a new wire with enhanced oxidation resistance to enable stable measurement by the EI method in an oxygen atmosphere. In this study, the gases evolved from polystyrene at various oxygen concentrations were measured by TG/DTA-MS using a filament for low-vacuum.