News from LabRulezGCMS Library - Week 31, 2024

Our Library never stops expanding. What are the most recent contributions to LabRulezGCMS Library in the week of 26th July 2024? Check out new documents from the field of the gas phase, especially GC and GC/MS techniques!

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This week we bring to you applications and other documents by LECO, Agilent Technologies, Metrohm Shimadzu!

1. LECO: Ginger Oil Analysis and Grade Differentiation with Pegasus BTX Using Hydrogen Carrier Gas

• application note

Key Words: Fast GC, Hydrogen, TOFMS, Flavor and Fragrance, Essential oil, Ginger oil, Quality control

Introduction: Ginger essential oil (ginger EO) derives from the rhizome of the plant and has been valued for centuries Zingiber officinale for its aromatic, medicinal, and culinary properties. With a rich history dating back to ancient China and India, ginger oil has been treasured for its versatile applications and therapeutic benefits. Ginger EO is renowned for its warming, spicy aroma and is commonly used in aromatherapy to alleviate nausea, improve digestion, and relieve muscle pain. In culinary applications, it adds depth and complexity to dishes, especially in Asian and Indian cuisines. Additionally, ginger oil is valued in skincare for its anti-inflammatory and antioxidant properties, promoting healthy skin and hair.

The chemical composition of ginger oil is complex, comprising various bioactive compounds such as gingerol, shogaol, and zingiberene. Gas Chromatography-Mass Spectrometry (GC-MS) analysis is commonly employed to assess the quality and purity of ginger oil, ensuring it meets industry standards and regulatory requirements. Differentiating essential oil grades is crucial for the perfumery, flavor, and food industries due to several reasons related to quality, consistency, safety, and overall product effectiveness. As an example, high quality EOs are often pure, unadulterated, and extracted using meticulous methods to preserve their natural properties, whil the low-quality ones may be diluted, adulterated, or extracted using less refined methods, potentially compromising their scent and taste profiles and therapeutic qualities.

In this context, perfumery industries often need to be able to assess EO quality parameters in a fast and reliable manner. This application note describes the conversion of a Helium-based method to a fast and reliable Hydrogen-based one using LECO's novel BTX GC-TOFMS instrument. This mass spectrometer offers a wide dynamic range and sensitivity at Pegasus low femtogram levels, allowing for the simultaneous detection of both abundant and trace components without losing any detail. Additionally, ChromaTOF Sync software was used to distinguish between different grades of ginger EO and identify ® markers for each of them.

Conclusions: This application note demonstrates how the BTX GC-TOFMS is an excellent solution for the rapid analysis of EOs Pegasus using H carrier gas. The results indicate that neither the chromatographic performance nor the mass spectral quality are 2 compromised by using H . A % reduction in runtime was achieved, leading to improved daily throughput. Additionally, 2 60 the Sync software tool effectively clustered the samples based on their origin and quality, enabling the ChromaTOF discovery of characteristic features that differentiate them. The output information received from Sync ChromaTOF allows for more informed usage of raw materials in creating new fragrances and enhances confidence in analyzing routine samples.

2. Metrohm: Comparison of SPELEC RAMAN and standard Raman microscopes

• application note

Larger laser spot size can provide representative results with a single measurement

Standard Raman microscopes are traditionally used to perform Raman measurements or Raman spectroelectrochemical experiments when they are coupled with electrochemical equipment. Raman spectra collected with confocal microscopes allows the characterization of very small areas. However, these instruments can exhibit several limitations. SPELEC RAMAN, a new generation of spectroscopic and spectroelectrochemical instruments, offers powerful and interesting features to overcome these issues. In this Application Note, a detailed comparison is made between the main features of a standard Raman instrument and the SPELEC RAMAN by analyzing the results obtained with both instruments.

CONCLUSION

SPELEC RAMAN exhibits a number of competitive advantages over standard Raman microscopes. For instance, the spot size of SPELEC RAMAN allows the characterization of a large area in a single experiment, obtaining representative results with only one measurement. The versatility of the Raman probe is demonstrated since it can be used with different cells. The portability as well as the simplicity of SPELEC RAMAN facilitate the performance of optical experiments. It also ensures the synchronization of electrochemical and optical signals in case Raman spectroelectrochemical measurements are carried out. In addition, DropView SPELEC software allows realtime acquisition of the data and the performance of operando measurements. The easy data treatment and analysis of the results is done using one-click tools.

3. Shimadzu: FTIR Talk Letter (vol. 42)

• other

Table of content

• Development of Dual Functional Catalytic Materials for CO2 Capture and Selective Hydrogenation and Mechanistic Elucidation of High CO Selectivity Using FTIR Spectroscopy | 02
• Configuration of the AIRsight Infrared Raman Microscope | 06
• Notes on Infrared Spectral Analysis – Aliphatic Saturated Hydrocarbons (Paraffins) | 10
• Fourier Transform Infrared Spectrophotometers "IRSpirit-X Series" | 16

4. Agilent Technologies: Helium, Argon, Nitrogen, and Hydrocarbon Impurity Analysis in Hydrogen Using an Agilent 8890 GC and TCD/FID System

• Application Note - Energy & Chemicals

Abstract

In this application note, the analysis of helium (He), nitrogen (N₂ ), argon (Ar), and hydrocarbon (HC) impurities in hydrogen (H₂ ) was demonstrated on an Agilent 8890 gas chromatography (GC) system using gas sampling valve injection, capillary column separation, and flame ionization/thermal conductivity detectors (FID/TCD). The system repeatability, sensitivity, and linearity were evaluated. The excellent test results demonstrated that the 8890 GC can provide accurate and precise analysis of the target analytes. In addition, this system can be applied to the quality control of fuel cell vehicles that used hydrogen, according to different regulations such as ISO 14687-2019 and GB/T 37244-2018.

Conclusion

In this application note, an Agilent 8890 GC configured with two gas valves, two types of detectors (FID/TCD), and three capillary PLOT columns, was applied to He, Ar, N₂, and HC impurity analysis in hydrogen. The system performance was evaluated using certified gas standards. The comprehensive assessment covered RT and response repeatability, linearity, quantitation accuracy, and method LODs. The area precision of all test compounds was better than 3.0% at the low concentration level. The LODs for He, Ar, N₂, and methane were 2.6, 0.6, 0.8, and 0.019 ppm, which were far below their quality limits in the ISO 14687-2019 and GB/T 37244-2018 standards. The quantitation accuracy was 92 to 116% across the calibration range. These excellent results demonstrate that the 8890 GC, together with the selected Agilent GC columns, can provide accurate, precise, and sensitive analysis of target components. The test system can reliably be used for the quality control of He, Ar, N₂, CH₄, and other HCs in FCV-grade hydrogen, according to ISO 14687-2019 and GB/T 37244-2018 requirements.