Form and Function: Understanding the Complex World of GC Inlet Liners (part 2 of 2)

In a previous installment, we explored how the shape and packing of a gas chromatographic (GC) inlet liner affects the precision and accuracy of split injections. This webinar is the second of a two-part series and will focus, instead, on liner performance in splitless injections.

Form and Function: Understanding the Complex World of GC Inlet Liners (part 1 of 2)

There are many liners to choose from, but do they all perform the same for a given split analysis? This webinar explores how the shape and packing of a gas chromatographic inlet liner affects the precision and accuracy of split injections.

Analysis of Impurities in 1,3-Butadiene Using a New Selective Alumina Column

1,3-butadiene is a C4 hydrocarbon primarily used for synthetic rubber production. Accurate analysis of impurities in 1,3-butadiene is critical because even trace levels of compounds like methyl acetylene and propadiene can destroy expensive polymerization catalysts. Alumina PLOT columns are commonly used for this analysis, but performance is highly dependent on deactivation. Learn what makes Restek Alumina BOND/MAPD PLOT columns ideal for 1,3-butadiene analysis, how to use them in a valve configured GC, and how they compare to other deactivations.

Finally! A True Peak Capacity Increase for GCxGC of Petroleum Samples

In their comparison of GC and GCxGC, Blumberg et al stated, “the peak capacity of currently practiced GC×GC does not generally exceed the peak capacity attainable from 1D-GC with the same analysis time…”. Seemingly, Blumberg’s main point was that the typical first dimension column in GCxGC is operated suboptimally. We lengthened this column to “naturally” increase peak widths and present here what we believe is the first “true peak capacity increase” for GCxGC.

Who Stole Selectivity from Gas Chromatographers and Can We Get It Back?

Chromatographic selectivity has taken a backseat to efficiency and MS, however, there are situations today that argue for development of highly selective GC stationary phases, even when MS is used.

This webinar discusses the development and characterization of GC stationary phases which exhibit novel selectivity, and demonstrate how this can provide determinations not possible using routine phases, even if employing MS.

Sulfur in LNG: It's Gone Before You Know It

Accurate quantification of sulfur compounds in LNG is challenging, due to the adsorption of analytes in sample collection devices. This webinar demonstrates how using Sulfinert® treated sample cylinders prevents loss and improves accuracy compared to untreated stainless steel cylinders.

Improve Your Chromatography in Minutes

This brief webinar introduces some common sources of poor liquid chromatography, and presents easy ways to improve chromatographic performance. Money-saving techniques for improving analytical and guard column lifetime will also be discussed. Less than 17 minutes could help you get the most from your HPLC column and chromatographic system!

High Temperature SimDist Analysis

There are many simulated distillation (SimDist) analyses described in the ASTM methods. The most commonly used are ASTM D2887 and ASTM D7213 for light and mid-distillates (gasoline, diesel), as well as the high temperature simulated distillation of crude oils according to ASTM D6352. This 25-minute live webinar provides technical information on the various SimDist methods and includes discussion of column choices, injection techniques, and pain points such as column bleed.

ASTM D 6730 Detailed Hydrocarbon Analysis

This presentation provides an overview of detailed hydrocarbon analysis (DHA) according to ASTM Method D6730, discusses column specifications and critical separations, and explains why not every column is suitable for this analysis.

Analysis of Veterinary Drug Residues using a Unique HPLC Biphenyl Stationary Phase

Analysis of veterinary drug residues in milk using a QuEChERS approach and Biphenyl column is discussed. Better retention is achieved, compared to C18 or phenyl phases, improving separation of analytes and matrix components.

LC/MS in Forensic Toxicology: Selecting a Killer LC Column

An overview of the principles of LC/MS, focusing on the impact of column selection. Attendees will learn how to optimize separations using stationary phase selectivity and column dimensions.

Impact of Column Deactivation on the Chromatography of Polar Compounds at Sub-Nanogram Levels

Learn how new GC column technology results in higher peak responses, lower detection limits, and more predictable retention times. Explores the effect of column technology on peak shape and chromatographic performance.

LC/MS and GC/MS Analysis of Potential Genotoxic Impurities in Active Pharmaceutical Ingredients

Guidelines have recently been established for levels of potential genotoxic impurities (PGIs) in pharmaceutical APIs. This webinar outlines LC/MS and GC/MS methods developed in collaboration with Merck & Co.

Hybrid Midpolarity Siloxane Stationary Phase Polymers for Next Generation, High-Performance Capillary GC Columns

Recent application of new crossbonding and deactivation chemistries to a 35% phenyl equivalent hybrid siloxane phase results in advances in column efficiency, inertness for polar compounds, and thermal stability.

Using Phenyl Column Chemistry to Optimize Reversed Phase Separations

Sample Preparation of Cannabinoids in Urine Using the QuEChERS Method and dSPE Cleanup

This webinar introduces QuEChERS and dSPE and discusses their application to sample prep for GC/MS analysis of cannabinoids in urine. Attendees will learn how to increase sample throughput with this simple approach.

Simplifying the Setup for Vacuum-Outlet Gas Chromatography: Using a Restriction Inside the Inlet

This talk explores the benefits and practical considerations of operating a GC column under low pressure conditions. A novel concept that takes advantage of basic chromatographic parameters affecting resolution and column efficiency is presented.

Troubleshooting the Acetonitrile Shortage—Strategies for Today and Tomorrow

The Analysis of Residual Solvents—Implementing USP <467>

Chromatographers implementing USP <467> Residual Solvents will benefit from this webinar which discusses system optimization and implementation strategies for USP <467>, as well as headspace GC fundamentals.

EZ Twist Top™ Injection Port Flash Player required

Take a guided tour of the new EZ Twist Top™ Injection port, to learn how it simplifies maintenance, eliminates tangled gas lines, and makes changing liners a snap.

Waste Solvent Overflow Indicator Flash Player required

Learn how you can prevent messy mobile phase overflows with this compact, battery operated unit. Its audible alarm gives you time to empty or change the container before a spill happens.

The Restek Leak Detector Flash Player required

Find out about the innovations in the newest revision of Restek's Electronic Leak Detector, narrated by one of the engineers involved in its creation.

Introduction to QuEChERS Flash Player required

Jack Cochran, Director of New Business and Technology at Restek, gives a brief overview of the QuEChERS process, and how it can simplify your sample preparation workflow.