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Tekmar Talk Blog

Troubleshooting Part 3: Elution issues and moisture control

Posted by Amy Nutter on Fri, Jul 28, 2023 @ 01:33 PM

This is the third in our Troubleshooting series for VOC Analysis. 

Part three will discuss elusion issues and moisture control for VOC analysis.

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Tags: VOC, Teledyne Tekmar, Volatile Organic Compounds, P&T, Purge and Trap, Moisture Control

Moisture Control Blog Series Part 4: Ways to optimize moisture control in the GC-MS

Posted by Amy Nutter on Mon, Apr 10, 2023 @ 02:38 PM

Water vapor entering the gas chromatograph (GC) inlet, column, and, ultimately, the mass spectrometer (MS) can minimize the sensitivity of our early eluting compounds, including our gases. It can also cause poor peak shape, compounds to co-elude, and shift in retention time, even in compounds outside of the water peak. So, once the water is introduced into our system, it starts to wreak havoc on all our compounds. Some say water doesn’t affect column phase or lifespan, but some have seen an effect, especially if you’re running a lot of samples; water can shorten the column life of your GC column and can cause vacuum issues if you’re using a MS system, which could lead to shorter filament lifetime and having to clean the source more often.

Throughout this blog series, we’ve discussed ways to minimize the amount of water vapor introduced to the GC-MS, using Teledyne Tekmar’s moisture control fitting and application control. We can continue to control moisture not only through this hardware designed for the Purge and Trap, but also through method parameters we can adjust and using smart method parameters on the GC.

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Tags: VOC, Purge and Trap, Moisture Control

Moisture Control Blog Series Part 2: Ways to optimize moisture control in the Purge and Trap

Posted by Amy Nutter on Mon, Mar 06, 2023 @ 10:49 AM

In part one of this series, we learned why water vapor is bad for volatile organic compound (VOC) analysis. In part two, we will explore ways we can optimize moisture control in the Purge and Trap (P&T) system.

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Tags: VOC, application chemist, Purge and Trap, Moisture Control

Moisture Control Blog Series Part 1: Why is water vapor bad for VOC analysis?

Posted by Amy Nutter on Wed, Feb 01, 2023 @ 02:00 PM

Analyzing volatile organic compounds (VOCs) is an essential part of environmental monitoring, flavor and fragrance analysis, and analysis in the pharmaceutical and petrochemical industries. Gas Chromatograph (GC) columns and detectors, namely Mass Spectrometers (MS), do not perform well in the presence of water. Before the sample is introduced to the GC, it must become a vapor.

For this reason, there are many samples, such as

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Tags: VOC, Moisture Control

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