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Title and Description
High Temp GCxGC of Light Crude Oil and High Boilers

StayClean Ion Source: Changing the Filament

The StayClean Ion Source dramatically reduces system downtime. The only maintenance this source requires is periodic filament replacement. This video walks through the simple process of changing the filament.

Science from Beyond the Grave: a Virtual GC Symposium

Three GC/MS Experts embrace the 'spookier' side of mass spectrometry.

Jane Hill, from the University of British Columbia, brings her expertise on 'omics and medical diagnostics in Disease: Trick or Treat? Metabolomics is changing how we monitor our health

Albert Lebedev, professor at the Faculty of Chemistry at Moscow State University, has suggestions and advice for what to do if you meet a mummy (and happen to have access to mass spectrometry!) in What Mass Spectrometry can tell you about 5000 year old Mummies

Shari Forbes, Director of Canada's Secure Site for Research in Thanatology, will finish the symposium with a look into GCxGC mass spectrometry and the wider range of research and training that can come from Canada's first body farm in Death, Decomposition and Dogs

Cement Clinker Preparation and Microscopic Examination

Cement Clinkers are an intermediate product in the production of Portland Cement, one of the key ingredients in the manufacturing of concrete. Microscopic examination and analysis of Clinkers is a Quality Assurance process that assesses the nature and quality of Clinker constituents. This Webinar will discuss the process of sample preparation, microscopic examination, and the assessment of Cement Clinkers.

Carbon and Nitrogen Determination in Adhesives, Laminates, and Cement Fiber Board

Determination of carbon and nitrogen in construction materials plays an important role in maintaining quality and durability of these products. This webinar will focus on this application using both the LECO CN928 and the C832. Data will be presented from a wide range of materials used in the construction industry. | Presented by Fred Schultz, Applications Chemist

Moisture/LOI Determination in Cement, Fly ash, Gypsum and Lime

Thermogravimetric analysis (TGA) is a widely used technique for Moisture or Loss on Ignition (LOI) determination in various materials. This webinar will explore enhancements in the method technique to characterize mass loss in specified materials using LECO TGA instruments. The methods discussed will include Split Loss in Cement, LOI in Combustion Residues following ASTM D7348, LOI in Flue Gas Desulfurization Solids following ASTM D8339 and Moisture and LOI in Hydrated Lime. | Presented by Jeffery Gast, Lead Analytical Chemist

Total Sulfur and Carbon Determination in Cement and Raw Materials

This webinar will review the application of the LECO SC832 family for the determination of sulfur and carbon in a wide variety of construction materials. Sample types covered in this presentation include cement, fly ash and ore materials. In addition, the basic operating principles will be covered as well as software features that can be used to simplify the analysis and reporting of results. | Presented by Lloyd Allen, Ph.D., Director Technical Services Laboratory

Principles and Instrumentation of GC×GC and ToF-MS

Improved sensitivity and group-type selectivity makes GC×GC ideal for MOSH/MOAH separations - saturated species can be separated from the unsaturated or aromatic ones. Hans-Gerd Janssen, University of Wageningen, Netherlands.

Understanding Food Off-Flavors and Malodors

Utilizing Gas Chromatography-Olfactometry (GC-O) can help identify active odor compounds in complex mixtures. But, what happens if GC-O does not identify a compound, but an off-flavor or malodor is still present?

Basic Metallographic Analysis of Welds

Dave Coulston discusses what benefits can be derived from the different weld examinations and how best to prepare welds for such analyses, as well as typical weld measurements and examples of automated hardness testing of welds.

Determination of Moisture in Welding Flux

The American Welding Society (AWS) method A4.4M:2001 (R2006) “Standard Procedures for Determination of Moisture Content of Welding Fluxes and Welding Electrode Flux Coatings” outlines the appropriate methodology for sample preparation and analysis for this application. Moisture content in the flux can be correlated to the hydrogen content in the weld metal, and to varying degrees, the potential for hydrogen embrittlement. Clearly, determination of moisture content in welding flux is necessary to understand the quality of the final weld. Join us to learn how the LECO RC612 can be utilized to quantify the moisture present in welding flux samples, as outlined by AWS A4.4:2001 (R2006). Adam Darling, Analytical Chemist, LECO Corporation

Analysis of Carburized Steels by Glow Discharge Spectroscopy

Precise measurement of carbon in carburized steel can be challenging due to changing concentrations throughout the hardened case of a sample. Glow discharge spectroscopy (GDS) offers a repeatable ability to measure carbon in a region spatially discrete from organic carbon on the near surface and in the base material. The presentation includes comparisons to other measurements, relationships to microhardness measurements, and characterization of the materials with GDS compositional depth profiles and bulk analyses. Andrew Storey, Field Sales Specialist, LECO Corporation

Metallographic Preparation and Analysis of Carburized Steel

Many steel components can benefit from surface hardening, which improves wear resistance while maintaining a part’s toughness. Surface hardening can be accomplished by nitriding, induction hardening, or even shot peening; but carburizing remains the most viable choice for many applications. In this webinar, Dave Coulston explains what carburizing is, how it is accomplished, and then describes the important chemical, metallurgical and mechanical property results of a carburizing treatment. This is followed by metallographic preparation of carburized steel and microscopic evaluation of the carburized layer.

Application of Two-Dimensional Gas Chromatography with Mass Spectrometric Detection for Analysis of Pesticide Residues in Foodstuffs

The Czech Agriculture and Food Inspection Authority has been using GCxGC-TOFMS for the analysis of pesticide residues in food of plant origin since 2005. Radim Stepan will talk about the advances in the instruments and the analyses they have used for pesticide residue analysis in cooperation with the University of Chemistry and Technology Prague.

Food Safety: A Journey Beyond the MOSH&MOAH Hump in Food Determination

The current analytical method for the quantitative determination of Mineral Oil Saturated Hydrocarbons (MOSH) and Mineral Oil Aromatic Hydrocarbons (MOAH) is LC-GC-FID, but the chromaticagraphic profile obtained is too often just a hump of unresolved substances. However, GCxGC-TOFMS/FID is the most promising solution to characterize MOSH and MOAH in detail and to detect markers that can help identify and act on the source of contamination. Giorgia Purcaro [University of Liege] will introduce the challenges of MOSH/MOAH analysis and talk about what adding a GCxGC-TOFMS analysis to your process can do for your results.

Optimization of Combustion Methods for the Determination of Low-Level Nitrogen/Protein in Food

Combustion techniques for determining nitrogen/protein in foods is gaining popularity due to shorter analysis times, ease of operation, and improved safety characteristics, but it is limited by the amount of sample an instrument is capable of analyzing at one time. Low-level nitrogen samples present a challenge to analyze due to sample characteristics and method limitations. Lloyd Allen, from LECO, will be discussing how to optimize methods for low-level nitrogen determination with combustion instruments.

Automated Thermogravimetric Moisture Determination of Meat and Semi-Solid Food Products

One of the most common moisture determination methods is a manual mass loss on drying using an air oven following the AOAC Moisture in Meat Method (950.46). Lloyd Allen will talk about how an automated thermogravimetric moisture instrument, such as the TGM800, meets the AOAC Official Method's requirements for sample mass, oven temperature, and air flow requirements while also reducing operator and analysis times, improving precision and workflow efficiency.

Automated Thermogravimetric Determination of Moisture and Ash in Flour

The AOAC Official Method (925.10) Solids (Total) and Moisture in Flour utilizes a manual, air oven, loss-on-drying technique that is widely used in the food industry. AOAC Official Method (923.03) Ash in Flour also utilizes a manual, air oven, loss-on-drying technique. Learn from Jeffery Gast how an automated thermogravimetric moisture determination instrument like the TGA801 can follow both of the AOAC Official Methods' requirements for oven temperature and airflow while also reducing operator and analysis times, improving workflow efficiency.

Multiclass GCxGC Method for Cannabis Products

Lorne Fell [LECO] provides an update on LECO Separation Science instruments and equipment. Jean-François Focant [University of Liège] presents "Multiclass GCxGC Method for Cannabis Products", discussing how GCxGC can be utilized to study cannabis strains for CBD content.

Analysis of GCxGC-TOFMS Data using Tile-Based Fisher Ratio

Rob Synovec [University of Washington] discusses discovery-based analysis and its application into gas chromatography, and the development of ChromaTOF® Tile, a tile-based fisher ratio analysis tool. [Synovec presentation begins at 14:00]