Join us for a free two-day LECO Separation Science Workshop on September 23–24, 2026, at the <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/companies/219">C³AL Laboratory</a> at Cal State LA. Registration is free, and meals and refreshments will be provided throughout the workshop.&nbsp;<h4>Registration</h4><blockquote>👉<a target="_blank" rel="noopener noreferrer" href="https://forms.cloud.microsoft/pages/responsepage.aspx?id=iYeNbqIuykW7qZP4_jUEVbznDB40eK1PgjPzhHyb__9URTFTTFA5UEEzQ1A4MUtFV0o4TEJTNlZCOS4u&amp;route=shorturl">Register HERE</a>Space is limited, register today!<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/LECO_LECO_Separation_Science_Workshop_registration_332543a18e.jpg" alt="LECO: LECO Separation Science Workshop - QR code for registration" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_LECO_LECO_Separation_Science_Workshop_registration_332543a18e.jpg 156w," sizes="100vw" width="437" height="437"></blockquote><h4>Hand-on Experience with the LECO Complex Chemical Composition Analysis Lab C3AL</h4><ul><li>Work directly with LECO instruments in the C3AL Laboratory</li><li>Learn complete analytical workflows from sample to answer</li><li>Get expert guidance from LECO application scientists</li><li>Develop methods and solve real-world challenges</li><li>Collaborate, ask questions, and build your skills</li></ul><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Cal_State_LA_The_LECO_Pegasus_BTX_system_in_Cal_State_LA_s_LECO_Complex_Chemical_Compositional_Analysis_Lab_enhances_research_and_student_training_in_advanced_chemical_analysis_cover_b739e727ca.jpg" alt="Cal State LA: The LECO Pegasus BTX system in Cal State LA’s LECO Complex Chemical Compositional Analysis Lab enhances research and student training in advanced chemical analysis" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Cal_State_LA_The_LECO_Pegasus_BTX_system_in_Cal_State_LA_s_LECO_Complex_Chemical_Compositional_Analysis_Lab_enhances_research_and_student_training_in_advanced_chemical_analysis_cover_b739e727ca.jpg 227w," sizes="100vw" width="1252" height="863">The first day will focus on the fundamentals and theory of comprehensive two-dimensional gas chromatography (GC×GC), with an emphasis on understanding how GC×GC can enhance your research, solve complex analytical challenges, and support your laboratory or company goals.&nbsp;The second day will be dedicated to hands-on activities, giving participants the opportunity to work directly with LECO instrumentation, learn practical analytical workflows, and analyze their own samples with guidance from LECO application scientists.&nbsp;Whether you are new to GC×GC or looking to expand its use in your research or organization, this workshop offers a unique opportunity to learn, explore, and apply the technology in a practical setting. Space is limited, so register early!<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Cal_State_LA_LECO_QUADJET_G_Cx_GC_coupled_to_Pegasus_BT_4_D_TOM_MS_in_the_Complex_Chemical_Composition_Analysis_Lab_C_AL_077a14ae34/Cal-State-LA-LECO-QUADJET-GCxGC-coupled-to-Pegasus-BT-4D-TOM-MS-in-the-Complex-Chemical-Composition-Analysis-Lab-(CAL).jpg" alt="Cal State LA: LECO QUADJET GCxGC coupled to Pegasus BT 4D TOM MS in the Complex Chemical Composition Analysis Lab (C³AL)" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Cal_State_LA_LECO_QUADJET_G_Cx_GC_coupled_to_Pegasus_BT_4_D_TOM_MS_in_the_Complex_Chemical_Composition_Analysis_Lab_C_AL_077a14ae34/thumbnail_Cal-State-LA-LECO-QUADJET-GCxGC-coupled-to-Pegasus-BT-4D-TOM-MS-in-the-Complex-Chemical-Composition-Analysis-Lab-(CAL).jpg 234w," sizes="100vw" width="1949" height="1299">

LECO Separation Science Workshop

An international research team, which included scientists from the Faculty of Science at Palacký University and the Institute of Physics of the Czech Academy of Sciences, has succeeded in unraveling the complex mechanism by which a chemical bond is formed during a collision between molecules. The experts found that the reaction only takes place if the molecules are oriented towards each other within a very narrow range of angles – within the so-called cone of reaction. This joint research has thus provided an answer to one of the fundamental questions of chemistry: under what conditions do chemical bonds form between molecules. The results of the study&nbsp;Spatially resolving the cone of reaction for a single molecule&nbsp;were published in the prestigious scientific journal&nbsp;Science.Many chemical reactions begin with the collision of two particles. However, for a new chemical bond to form, it is not enough for the molecules simply to come into contact. Their collision must occur with sufficient energy, in the correct relative orientation and at the right location. Under normal conditions, such as in solutions or gases, molecules collide chaotically, and the precise parameters of these collisions cannot therefore be controlled.<h4>Molecules under control</h4>Scientists were able to control the collisions of individual molecules on a copper surface and monitored the process using a scanning tunnelling microscope. They used the instrument not only to visualise individual molecules, but also to deliberately accelerate the reactants towards one another. They subsequently analysed each collision with atomic-level resolution. This enabled them to determine unequivocally whether a new chemical bond had formed between the molecules.<h5>“What is hidden in the statistics of billions of collisions in conventional chemistry, we have managed to break down into individual cases and map directly.” Adam Matěj</h5>A key finding of the study is that the outcome of a collision is determined by the extremely precise orientation of the molecules. A new bond was formed only when the target molecule was oriented within a few degrees of the direction of movement of the other molecule. When rotated by more than fifteen degrees, the molecules simply bounced off each other without any reaction.<h4>The precise orientation of the molecules is crucial</h4>“For the first time, we were able to observe, using a single molecule, exactly how precisely it must be oriented for the reaction to take place at all. What is hidden in the statistics of billions of collisions in conventional chemistry, we have managed to break down into individual cases and map directly,” said Adam Matěj from the Department of Physical Chemistry at the Faculty of Science.The theoretical part of the study, in which researchers from Palacký University and the Institute of Physics of the Czech Academy of Sciences were involved, played a significant role. Using quantum-mechanical calculations, they explained why the ‘reaction cone’ is so narrow. It turned out that the reactive carbon atom is surrounded by hydrogen atoms, which block the access of the reacting molecule from almost all directions.<h4>The arrangement of atoms restricts access to the reaction</h4>The calculations also shed light on a surprising experimental result. The chemical reaction took place even when the molecule moved along an adjacent row of copper atoms, where, according to the original assumptions, no bond should have formed.<h5>“The strength of this work lies in the fact that the experiment and theory have been brought together into a single picture. The microscope showed what happens during the collision, and the calculations explained why.” Pavel Jelínek</h5>“The explanation lies in the slight displacement of a single copper atom on the surface. The target’s bond to the surface pulls it out of its position and brings it close enough to the neighbouring row that it can literally take over the projectile and direct it to the correct spot. This shows that the surface is not merely a passive substrate, but actively participates in the reaction itself and can even facilitate pathways that would otherwise be unfavourable,” noted Adam Matěj.<h4>The surface also determines the course of the reaction</h4>The results are significant for the development of so-called surface reactions, in which new materials and nanostructures are purposefully assembled from individual molecules. A better understanding of the influence of the spatial arrangement of molecules will enable the design of molecular building blocks so that they bond more reliably and efficiently. This represents an important step towards the development of technologies based on the controlled construction of structures atom by atom.“The strength of this work lies in the fact that experiment and theory have been brought together into a single picture. The microscope showed what happens during the collision, and the calculations explained why. Without a theoretical model, we would have found it difficult to discover that the movement of a single surface atom is behind the unexpected course of the reaction,” added Pavel Jelínek from the Institute of Physics of the Czech Academy of Sciences.<blockquote>The study&nbsp;Spatially resolving the cone of reaction for a single molecule&nbsp;was produced in collaboration between researchers from the University of Graz, the Institute of Physics of the Czech Academy of Sciences, Palacký University in Olomouc, Charles University and Humboldt University in Berlin.</blockquote>

Scientists reveal when chemical bonds form in molecular collisions 

Injecting water into a gas chromatography (GC) system has always raised concerns for analysts. Many wonder if water will damage their <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products?category=7&amp;manufacturerItems=50">GC column</a> or instrument. In fact, one of the most common questions in gas chromatography water analysis is whether aqueous samples can be safely introduced without compromising results.Selecting the right GC column for water analysis and following proper injection techniques can minimize the risk of column damage and maintain reliable analytical results.<h3>Why Water Injections Are Risky in GC</h3>Water injections in gas chromatography columns are risky due to the following reasons:<h4>Backflash Issues</h4>Water expands significantly when vaporized at high inlet temperatures (e.g., 250–300 °C). If the expansion volume exceeds the inlet liner capacity, backflash can occur. This contaminates injector parts, leaving residues that cause ghost peaks, carryover, sample loss, and elevated baselines, ultimately reducing reproducibility and accuracy.<h4>Stationary Phase Degradation</h4>As a highly polar solvent, water can hydrogen bond with stationary phase polymers such as polyethylene glycol (PEG) or wax phases. Repeated exposure alters selectivity, shifts retention times, and may increase bleed in non-crosslinked phases. While older immobilized PEG phases are especially vulnerable, modern chemically bonded and crosslinked stationary phases offer improved resistance, making them more suitable to inject up to 100% water samples.<h4>Incomplete Vaporization</h4>Water’s high boiling point and poor wetting of non-polar stationary phases can result in incomplete vaporization. This may lead to peak splitting, band broadening, or reduced sensitivity. For this reason, injection settings need to be finely adjusted to avoid these effects.<h4>Detector Issue</h4>Standard GC detectors do not directly detect water. Excess water injected into a flame ionization detector (FID) can quench or even extinguish the flame, while moisture in an electron capture detector (ECD) can interfere with electron capture efficiency, suppressing signals or causing false responses.<h3>Choosing the Right GC Columns for Water-Containing Samples</h3>Here are some strategies that can help you increase the life of GC columns when analyzing water-containing samples.<ul><li>Use of cross-linked phases: Modern stationary phase design has greatly improved tolerance to water injections in GC. Cross-linking chemically bonds the stationary phase to the silica surface, making it far more resistant to leaching or washout from polar solvents. Traditionally immobilized but not cross-linked phases were much more vulnerable to degradation. For example, polyethylene glycol (PEG) phases are inherently hydrophilic and prone to water damage unless cross-linked. With technologies such as engineered self-crosslinking (ESC), used in Phenomenex <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products/1571">Zebron ZB-WAXplus GC columns</a>, PEG phases can withstand repeated water injections without significant loss of efficiency.</li><li>Use of non-polar columns: Non-polar bonded and cross-linked columns (e.g., PDMS phases) are inherently resistant to water damage, though incomplete vaporization may still affect peak quality.</li></ul><h3>Tips to Protect Your GC System from Water Damage</h3>Implementing a few key tips can help protect your GC system from water damage. Here are some of the important recommendations:<ul><li>Keep injections small: Limit water injections to ≤0.2 µL to minimize backflash and protect the stationary phase.</li><li>Select the right liner: Use an appropriately sized inlet liner (e.g., 4.0 mm ID tapered or with a double gooseneck) to reduce backflash. A deactivated glass wool plug can promote rapid vaporization, though it may not be suitable for all analytes.</li><li>Reduce syringe carryover: Rinse syringes with a 50:50 methanol–water mixture between injections. In some methods, preparing samples with a small percentage of methanol can improve reproducibility and syringe performance.</li><li>Optimize solvent and injector conditions: Limit water injections to ≤0.2 µL to minimize backflash and protect the stationary phase.</li><li>Adjust carrier gas conditions: Ensure your <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/article/5538">gas chromatography injector setup</a> is correct to prevent water buildup. Combining water with a lower-expansion solvent (e.g., methanol) and maintaining an optimized injector temperature helps improve vaporization while limiting expansion.</li><li>Maintain a clean carrier gas supply: Replace gas cylinders before they are nearly empty to avoid backflow or moisture intrusion into the system While injecting water into a GC system is not simple and ideal, it can be managed safely with the right precautions. By choosing the appropriate stationary phase, following proper GC injector setup, and maintaining your instrument, you can conduct gas chromatography water analysis with confidence. For more information on GC hardware and maintenance, explore the <a target="_blank" rel="noopener noreferrer" href="https://www.phenomenex.com/resources/knowledge-center/gc-knowledge-center/understanding-the-essential-components-of-gas-chromatography">key parts of a GC instrument</a>.</li></ul>

Water Injections in GC: Is it Safe?

Article

Events

Academy

Science and research

Phenomenex is a global technology leader committed to developing novel analytical chemistry solutions that solve the separation and purification challenges of researchers in industrial, government and academic laboratories.

Phenomenex

In 1936, the Laboratory Equipment Company introduced the first rapid carbon determinator for the American iron and steel industry.  Today, almost 80 years later, LECO is recognized globally as a leader in the development of high-quality analytical instrumentation, mass spectrometers, comprehensive two-dimensional chromatography, metallography & optical equipment as well as consumables.

LECO

Palacký University Olomouc (UP) is an internationally respected and scientifically and academically highly productive university in Central Europe. Founded 22 December 1573, it is the second-oldest university in the Czech Republic and the oldest one in Moravia. For 450 years it has contributed to the intellectual wealth of society and to its scientific, cultural, and social development.

Palacký University Olomouc

GERSTEL

Quantum Analytics

Frontier Lab

Shimadzu Corporation

During these sessions, we will be highlighting the newest generation pyrolyzer from Frontier Laboratories – the Frontier-3030D Multi-Shot Pyrolyzer. If you are a Frontier 2020-series pyrolyzer user, or are using a different brand of pyrolyzer, you may be curious about the features and benefits of this next generation instrument.
<h3>Key webinar take-aways:</h3>
<ul>
<li>Comprehensive overview of the next generation multi-shot pyrolyzer from Frontier</li>
<li>What sets the instrument’s micro-furnace design apart</li>
<li>Instrument compatibility and hardware discussion</li>
<li>Review important EOL information on 2020-series consumables and support</li>
</ul>
<blockquote>
Presenter: Rojin Belganeh (Technical Director, Frontier Lab Americas)
</blockquote>
<blockquote>
Rojin Belganeh is the Technical Director at Frontier Lab Americas. Rojin graduated from the University of Houston with a Bachelor of Science in Chemistry. She started her profession as an analytical chemist working with various analytical instruments and techniques, such as Pyrolysis GCMS, TGA, FTIR, and X-Rays for material characterization, polymer identification, and contamination analysis. She also holds an MBA degree concentrating in strategic marketing. As a former user for more than five years, Rojin is very passionate about creating awareness and providing technical support to users.
</blockquote>

Frontier Laboratories: Multi-Shot Pyrolysis: Superior Technology for Serious Science

Multi-Shot Pyrolysis: Superior Technology for Serious Science

Pyrolysis GC often deals with the characterization of unknown samples. When the sample is unknown, however, it can be challenging to select appropriate instrument set-up and method parameter starting points.
In this webinar, useful information is presented on using pyrolysis GC-MS to identify polymeric materials and how to approach method development in the most efficient manner.

Pixabay/Adrian Malec: Pyrolysis GC-MS analysis of polymeric materials

Pyrolysis GC-MS analysis of polymeric materials

The first part of the webinar focuses on background and practical aspects of pyrolysis-GC/MS with respect to method development.
The second part is about identification of polymer components from complex pyrolysate mixtures using a database approach.
Pyrolysis GC often deals with the characterization of unknown samples. When the sample is unknown, however, it can be challenging to select appropriate instrument set-up and method parameter starting points. In this webinar, useful information is presented on using pyrolysis GC-MS to identify polymeric materials and how approach method development in the most efficient manner.
<h5>Pyrolysis GC-MS of polymeric materials – Identification of polymer components from a complex pyrolysate mixture using a database approach</h5>
Pyrolysis of polymeric materials as a sample introduction technique for gas chromatography most often results in complex chromatograms showing the polymer fragmentation. If the sample itself is a mixture of materials, however, the resulting chromatogram is even more complex. Examples range from simple co-polymers with different additives and impurities to highly complex environmental samples with microplastics content. In more complex cases simple mass spectral identification via library comparison will be of limited use. A new peak based data base approach can help provide information to help identity polymer materials in complex samples.

Gerstel: Pyrolysis GC-MS analysis of polymeric materials – Background and practical aspects with respect to method development

Pyrolysis GC-MS analysis of polymeric materials – Background and practical aspects with respect to method development

Analyzing environmental samples, including water, for microplastics is a challenging task. In many cases, microplastics must be identified and quantified in the presence of significant amounts of other organic and mineral matter.
Thermal analysis techniques combined with GC/MS are promising with regard to providing efficient identification and quantification via polymer marker fragments with only limited sample preparation effort.
Organic matter separated by filtration from water samples is pyrolyzed and resulting fragments identified using GC/MS. In order to compensate for sample inhomogeneity representative larger sample amounts are pyrolyzed in a TGA instrument (Thermogravimetric Analysis) coupled to a GC-MS system by means of an automated sampling system for TGA exhaust gas

Pixabay/Manfred Richter: TED-GC/MS, Thermal Extraction and –Desorption combined with Gas Chromatography-Mass Spectrometry, a novel technique for the determination of microplastics in water

TED-GC/MS, Thermal Extraction and –Desorption combined with Gas Chromatography-Mass Spectrometry, a novel technique for the determination of microplastics in water

This is the fifth session in a series of webinars on fundamental concepts in gas chromatography.
<h3>This session will cover:</h3>
<ul>
<li>Headspace</li>
<li>Thermal desorption</li>
<li>SPME</li>
<li>Pyrolysis</li>
<li>Gas Sampling</li>
</ul>
This series is perfect for anyone currently using GC, who&#39;d like to understand more about the technique, the hardware and the data produced. It&#39;s also suitable for anyone who is new to GC and who&#39;d like to understand more about it.
If you missed the previous sessions, we strongly recommend you watch them first. They are available to watch on <a href="www.shimadzu.co.uk/webinars">our website</a>
<h3>Future sessions, which will be available from our website, will aim to cover:</h3>
<ul>
<li>Choices of Detectors for GC</li>
<li>Processing GC Data </li>
<li>Maintenance &amp; Troubleshooting</li>
</ul>

Shimadzu: Shimadzu Theory & Key Principles Series - GC Session 5: Alternative to Liquid Injection

Shimadzu Theory & Key Principles Series - GC Session 5: Alternative to Liquid Injection

This is the fifth session will cover: Headspace, Thermal desorption, SPME, Pyrolysis, Gas Sampling.

GC Theory & Principles: Alternative to Liquid Injection

Plastic pollution is a major environmental issue faced at global scale. Micro- and nanoplastics enter the environment in consumer and industrial products and as breakdown products of plastics of larger size (macroplastics). Initial efforts to assess the environmental risk associated with plastic pollution focused on the marine environment; however, micro- and nanoplastics have been found in a variety of environmental compartments: wastewater, surface water, biosolids…
Molecular spectrometry-based methods were first employed for studying these contaminants. Recently, pyrolysis coupled with gas chromatography mass spectrometry (Py-GCMS) has been successfully applied for the identification and quantitation of various types of plastics. 
In this event, our two speakers will discuss the suitability of this technique for assessing the fate of microplastics in the environment. They will also present examples of how they have applied Py-GCMS for studying these contaminants in water, biosolids and seafood samples, among others.
<blockquote>
Presenter: Kevin Thomas (Director/Professor, Queensland Alliance for Environmental Health Sciences, University of Queensland)
</blockquote>
<blockquote>
Professor Kevin Thomas is Director of the Queensland Alliance for Environmental Health Sciences (QAEHS). Kevin is an environmental health scientist with a particular interest in characterising the totality of the chemical exposome throughout our lives. His research is focused on developing sensitive and novel techniques to sample and quantify environmental exposure in order to try and better understand the risk posed to health from exposure to complex mixtures of chemicals. One such area is environmental microplastics where his team at the University of Queensland has been developing approaches to analyse plastics in a range of environmental samples including biosolids and fish. Author of over 200 peer-reviewed papers and Associate Editor for the journal Science of the Total Environment, Kevin is a strong collaborative researcher having founded the international SCORE network on sewer biomarker analysis for community health assessment (<a href="https://score-cost.eu/">www.score-cost.eu</a>) and as recently reported in Science is currently establishing a global emerging contaminant early warning network (<a href="https://science.sciencemag.org/">www.science.sciencemag.org</a>).
</blockquote>
<blockquote>
Presenter: John Scott (Senior Chemist, Illinois Sustainable Technology Center, University of Illinois)
</blockquote>
<blockquote>
John Scott is a senior chemist at the Illinois Sustainable Technology Center at the University of Illinois. His research interests include emerging contaminants, waste to energy, biomass utilization and natural products. He has been involved in microplastics research for the past 6 years and participates in regional and international projects addressing microplastics in freshwater systems.
</blockquote>
<blockquote>
Presenter: Ruth Marfil-Vega (Environmental Marketing Manager, Shimadzu Scientific Instruments)
</blockquote>
<blockquote>
Ruth Marfil-Vega is the Environmental Marketing Manager at Shimadzu Scientific Instruments (SSI). She has more than 15 years of experience in the environmental chemistry, science and engineering fields, developing and implementing solutions for emerging water quality issues and regulated contaminants for various stakeholders in the water sector. Before joining SSI, she worked at American Water and EPA ORD. She received a PhD in Environmental Science from the University of Cincinnati.
</blockquote>

Shimadzu ASMS 2020: Pyrolysis-GCMS: The Power of Mass Spectroscopy for Unveiling Plastic Contamination in the Environment

ASMS 2020: Pyrolysis-GCMS: The Power of Mass Spectroscopy for Unveiling Plastic Contamination in the Environment

The suitability of this technique for assessing the fate of microplastics in the environment.

Pyrolysis-GCMS: The Power of Mass Spectrometry

We will show the benefits of FLAB µFurnace Pyrolyzer and introduce our analytical Method Map. 
We will also present applications of our new PEG polar extraction element (Magic Chemisorber), show how to identify unknown polymeric materials and run failure analysis. 
Finally, we will introduce a new ID algorithm for µ-plastics.
<h3>TOPICS:</h3>
<ul>
<li>Analytical Pyrolisis &amp; Benefits of FLAB µFurnace Pyrolyzer</li>
<li>Introduction of Analytical Method Map</li>
<li>New Polar Magic Chemisorber</li>
<li>Failure Analysis and ID if unknown materials</li>
<li>Detection of µ-plastics using new identification algorithm</li>
</ul>
Please do not forget to register in advance using this <a href="https://meetingsemea21.webex.com/webappng/sites/meetingsemea21/dashboard?siteurl=meetingsemea21">link - registration</a> and meeting number 954 202 056 to join. After registration, you will receive the meeting password by E-Mail.

Frontier Lab: New developments and selected applications in analytical pyrolysis: Expanding the versatility of a modern Pyrolysis-GC/MS platform

GCMS webinars focusing on Pyrolysis - page 5