Make the Leap from GC to LC-MS/MS

Jun 27, 2019 | Blogs, Technology | 0 comments

 

Choosing the best technique for your analysis can be tough. Should you go with gas chromatography/mass spectrometry (GC-MS) or liquid chromatography/tandem mass spectrometry (LC-MS/MS)? That’s the key question. That’s why we’re here to help.

The Limitations of GC-MS
GC-MS is an established technique to analyze volatile organic compounds (VOCs) and trihalomethanes (THMs). Simply put, it’s a technique that’s best used for thermally stable molecules. Traditionally, GC-MS is the preferred technique for the analysis of less polar and more volatile compounds such as organochlorine pesticides, dioxins, and polychlorinated biphenyl.

While the technique can offer good separation, the high temperatures used for vaporization during GC analysis can alter or degrade half of the analytes in a sample1. This is the primary concern for life science researchers who deal with relatively labile biological molecules that break down easily at high temperatures. GC-MS also becomes a challenge because it can involve labor-intensive sample preparation and long chromatographic run times.

The LC-MS/MS Advantage
LC-MS/MS combines the separation power of liquid chromatography with the identification and quantification power of tandem mass spectrometry.

The strength of this technique is in the ability of LC to separate a wide range of compounds before the tandem MS quantifies them with a high degree of sensitivity and selectivity based on the unique mass/charge (m/z) transitions of each compound of interest.

LC-MS/MS systems offer these basic benefits:

  • Faster, simpler sample preparation
  • Direct injection of aqueous samples
  • Less need for derivatization
  • Shorter chromatographic run times
  • Increased selectivity and sensitivity with multiple reaction monitoring (MRM)
  • Screening for a wider range of compounds in a single analysis

Many scientists who need increased levels of sensitivity, reproducibility, and robustness over GC-MS are either considering or have already made the leap to LC-MS/MS. When will you?

Let SCIEX Help You Make the Leap from GC-MS to LC-MS/MS

If your budget is holding you back, we have news for you. The SCIEX Triple Quad™ 3500 System provides all the advantages of modern LC-MS/MS technology. It’s the ideal choice for labs operating on a tight budget, and its simplicity of operation has the potential to expand your operation beyond the restrictions of gas chromatography.

Simply put, the Triple Quad 3500 LC-MS/MS System explained in fewer than 140 characters: Legendary power, speed, and accuracy are more affordable than ever.

Download your copy of the compendium to see what the SCIEX Triple Quad 3500 LC-MS/MS system can do for your laboratory.

Reference:

  1. Fang, Mingliang, et al. “Thermal degradation of small molecules: a global metabolomic investigation.”  Analytical Chemistry 87.21 (2015): 10935-10941.

Discover high-throughput LNP-mRNA integrity profiling

Lipid-based nanoparticles (LNPs) are effective non-viral vectors for delivering messenger RNA (mRNA) products, most notably used for production of vaccines against the recent SARS-CoV-2 pandemic.

Eliminate chick culling with innovative technology

While it sometimes seems questionable whether humanity and modern technology can coexist, technological advances in science can help pave the way to more compassionate business practices.

Using wastewater monitoring to assess exposure to PFAS

Per-and polyfluorinated alkyl substances (PFAS) are known for their water- and grease-resistant properties, which make them useful in many everyday items. In fact, a study from 2020 estimated over 200 “use categories” covering more than 1,400 individual PFAS compounds in commercial products—they are truly all around us. Due to their extensive presence and potentially harmful effects (these effects are still mostly uncertain), exposure to PFAS is a growing concern. Humans and wildlife have been exposed to these chemicals through a variety of routes, including food packaging, drinking water and cleaning products.

Posted by

0 Comments

Submit a Comment