Tekmar Talk Blog

If you work in a drinking water lab, you know there can be specific pain points to drinking water analysis. Here at Teledyne LABS, we design, manufacture, and distribute products that help make this analysis easier for our customers. Five of these pain points are:

It has been about one year since the Feb. 3, 2024, toxic train derailment in East Palestine, Ohio, where 20 cars carrying hazardous substances, including vinyl chloride, spilled onto the surrounding area. Vinyl chloride is a toxic material used in plastics production. Since then, a complete remediation of the

Late last year, the United States Environmental Protection Agency (EPA) announced it will be prioritizing five toxic chemicals for risk evaluation under the Toxic Substances Control Act. During this process, if the EPA designates these chemicals as High Priority Substances, they will undergo an extensive comprehensive study. These studies will be crucial to helping protect people from toxic exposure.

Has your laboratory been having issues obtaining helium for your environmental analysis? As helium supplies become scarcer and more expensive, you may have been seeking alternative carrier gases or ways to conserve helium without sacrificing system performance. This blog will explore ways to conserve helium during your purge and trap (P&T) analysis.

In this last installment of our volatile organic compound (VOC) analysis troubleshooting series, the benchmark test will be covered. This benchmark test is available in the Teledyne Tekmar TekLink software tools menu. The tool allows for full electromechanical testing, including valving, heaters, vial handling systems, liquid delivery system, inputs and outputs.

Throughout this troubleshooting series, in nearly every topic discussed, the answer led to performing a leak check on the Purge and Trap (P&T). This part of the series will go over the preventative maintenance program and understanding the leak check troubleshooting tool in Teklink, the Teledyne Tekmar P&T software.

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

• Part one is linked here, VOC Analysis Troubleshooting Part 1: How to Begin Troubleshooting
• Part two is linked here, Troubleshooting Part 2: No or low analyte response and carryover
• Part three is linked here: Elusion Issues and Moisture Control

Troubleshooting linearity and reproducibility issues in your systems can be difficult. Problems with linearity and reproducibility can make calibrating your systems frustrating, and if internal standards are varying, it can cause all other target compound to look unstable.

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

• Part one is linked here, VOC Analysis Troubleshooting Part 1: How to Begin Troubleshooting
• Part two is linked here, Troubleshooting Part 2: No or low analyte response and carryover

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

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

Part one is linked here, VOC Analysis Troubleshooting Part 1: How to Begin Troubleshooting

Part 2 will discuss No, or Low, Analyte Response and Carryover.

Troubleshooting your instruments can be a frustrating process, but I hope this series eases some of that pain and helps you through it. If you’re dealing with no or low response from your analytes, you first need to know if the analytes are even getting to the Gas Chromatograph and Mass Spectrometer (GC-MS). Following the advice in part one of this series, start with a direct injection into the GC of the same standards you use on your Purge and Trap (P&T), to confirm normal operation of the GC-MS. If you see poor chromatography and resolution or reduced response, you should change your inlet liner and clip the column.

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.