Analytical Instrument Documents

rss

JEOL Resources

Documentation in support of your JEOL product.

The Use of Dispersive Solid Phase Extraction in the Detection of Pesticides in Cannabis Flower by GC-MS/MS

This study presents a comprehensive method for the analysis of gas chromatograph (GC)-amendable pesticides in Cannabis flower. Furthermore, this method uses dispersive solid phase extraction (dSPE) to help mitigate matrix effects that are common in the flower extract. Three selected reaction monitoring (SRM) transitions were used for each target pesticide. This study was focused on developing a robust and sensitive method for GC amendable pesticides in Cannabis flower for use in the state of California. However, LC-MS/MS would also be required to analyze the complete California pesticide list.

Monitoring Rotary Vacuum Pump Oil Degradation by Using Field Desorption (FD)-TOFMS and Group-type Analysis Software

Field Desorption (FD) is a technique that ionizes analytes by electron tunneling from the analyte molecules to a solid surface (emitter) in a high electric field. The sample is applied directly onto the emitter and heated by applying an electric current through the emitter for desorption and ionization. FD has been used for the analysis of nonvolatile compounds, synthetic polymers, etc., as a soft ionization method to produce molecular ions with little or no fragmentations. As a result, the average molecular weight of a sample can be calculated directly from the masses (or “m/z”) and intensities for all of the ions observed in the FD mass spectrum. Furthermore, by applying group-type analysis, the components can be classified into types based on their functional groups and/or unsaturations. Average molecular weight, polydispersity index, or relative abundance of each type can also be obtained. In this work, new and used rotary vacuum pump (RP hereafter) oils were analyzed by FD. Afterwards, the change in their compositions was determined by performing group-type analysis on the resulting mass spectra.

Analysis of Additives in Plastic by Thermal Desorption (TD)

Among the various methods used for characterizing plastics, pyrolysis (Py) GC/MS and thermal desorption (TD) GC/MS are widely used for both qualitative and quantitative analyses. These are simple techniques that provide detailed information about the samples. In this application note, we report the analysis of additives in plastic by using a thermal desorption system and a JEOL JMS-T100GCV "AccuTOF GCv" GC-TOFMS. Identification of the analytes was accomplished by library search and accurate mass measurement. Additionally, isotope cluster pattern matching was performed using the "Mass Spec Tools™" software to help identify an unknown compound that was present in the sample.

Fraction base-KMD plots for a high-MW - S3000 - MSTips - 283

High molecular weight polymers are often MS-silent due to their inherent high dispersity (DM) or detected in the high mass range with low resolving power. An "on-plate" alkaline degradation has thus been developed as a sample pre-treatment on the MALDI target with tenths of ng of polymer to cut long industrial polyester chains into short oligomers amenable to MALDI-HRMS.

High Sensistivity Analysis of Intact Proteins using Linear TOF

The JMS-S3000 SpiralTOF has a unique 17m flight path that offers then highest resolution MALDI-TOF MS system currently available. However, ions with a very short lifetime or that undergo spontaneous dissociation during their flight cannot be detected by the SpiralTOF (or a conventional reflection TOF). To address this situation, the SpiralTOF with Linear TOF option can be used for the high sensitivity analysis of intact proteins.

Evolved Gas Analysis of Iron Powder using a TG/DTA System with a High-resolution Multi-turn Mass Spectrometer

Thermogravimetry/differential thermal analysis (TG/DTA) systems are often used to analyze the thermal behavior of metal materials. These systems measure changes in sample weight as they relate to programmed oven temperatures. It is generally known that during the measurement process, as the weight decreases, gases are evolved.

Direct Analysis of a Methanol Flame by using a Compact High-Resolution Multi-Turn Mass Spectrometer

The InfiTOF™ is a compact high resolution time-of-flight mass spectrometer (TOF-MS) that has a unique multi-turn ion optics system capable of providing a variable-length ion-flight path (up to 200m) in a very compact analyzer (20cm x 20cm). As a result of this, the InfiTOF allows the user to choose a resolving power based on path length in order to separate similar mass gas components like carbon monoxide and nitrogen as CO+ (m/z 27.9949) and N2+ (m/z 28.0062).

Analysis of Reaction Gases in a PECVD Chamber: Reaction Analysis using a High-Resolution Mass Spectrometer

Plasma-enhanced chemical vapor deposition (PECVD) is an evaporation technique that forms various thin films on a substrate using a material gas in a low-vacuum chamber. PECVD, which decomposes the material gas via plasma, is widely used to develop silicon, silicon oxide, and silicon nitride films in semiconductor device fabrication.

Other Resources

The following resources are available for the JEOL Analytical Instruments:

Media

Corona - Glow Discharge (DART Ion Source)

February 22, 2020
294