HPLC & GC Education
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Chromatography has played a crucial role in advancing new discoveries across various scientific fields. This separation technique is fundamental to innovations in drug discovery, environmental analysis, food safety, and much more.
HPLC Troubleshooting | Reproducibility Tips
HPLC Problems? It’s Not Your Method.
If you are injecting the same sample and getting different chromatograms, you do not have a method problem. You have a reproducibility problem, and reproducibility issues almost always point to the instrument, not the chemistry. Before you rewrite a method, change columns, or blame the detector, you need to slow down and ask a simpler question: Why is the system behaving differently injection to injection?
Why Your GC Inlet Total Flow Drops During a Temperature Ramp — And How to Fix It
What could be wrong if my inlet total flow falls when the oven temperature is ramping up?
Understanding constant pressure vs. constant flow in gas chromatography.
Why My HPLC Columns Last 15 Years: The Truth About pH and Column Damage
Most chromatographers have a love–hate relationship with their HPLC columns.
We love them when they work beautifully, separating the toughest mixtures with clean, sharp peaks. But we hate the fear—the fear of ruining a $1,000 column with a single wrong step.
HPLC Method Development Tips for Aromatic Compounds in Water-Based Gels: Why C18 Still Works
How does water interact with a C18 column? I want to test a water-based gel containing an aromatic compound. What’s the best column and method for this? And which solvent system works best with a Zorbax Eclipse Plus C18?
Let’s walk through the logic step by step—just as Dr. Polite explained it.
Clean A Reverse-Phase HPLC Column in 2 Simple Steps
Cleaning a reverse-phase HPLC column is easier than you might think.
With just two steps—water first, then organic solvent—you can flush out salts, buffers, and sticky residues that drag down your separations. Follow this recipe, and your column often feels like new.
HPLC Columns Explained: Understanding Carbon Load and Surface Area for Better Separations
Most chromatographers know whether they’re using a C18 or a C8 column. Some might even know their particle size.
But very few stop to consider two finer details that can make a big difference in your separations: carbon load and surface area.
What’s the Difference Between Superficially Porous and Totally Porous HPLC Columns?
Let’s do a deep dive into HPLC particles. Specifically, the difference between totally porous and superficially porous materials—and why it matters for efficiency and pressure.
Co-Elution: The Achilles’ Heel of Chromatography (and What You Can Do About It)
Chromatography is the most widely used analytical tool in modern chemistry.
But there’s one scenario where chromatography simply doesn’t work—and that’s co-elution.
Understanding the Master Resolution Equation: Your Key To Easier Method Development & Troubleshooting
For any chromatographer, whether seasoned or just starting, the ultimate goal is to achieve good separation between analytes. This separation, known as resolution (Rs), is not a matter of chance but can be understood and manipulated through a fundamental relationship called the master resolution equation.
3 Essential Gas Generators for Gas Chromatography (GC) Explained – Hydrogen, Air & Nitrogen Generators.
Gas chromatography (GC) relies on a steady and reliable supply of gases, making gas generators an essential component of a well-functioning GC system.
Negative Peaks in HPLC Refractive Index And UV Detectors
RI detector showing negative peaks? It's not a mistake! Most of us in the lab are pretty familiar with the sight of a good, strong positive peak on our chromatograms. It's what we expect, right?
GC Sample Prep Essentials: Nailing Solvents, Dilution & Injection
When you're working with Gas Chromatography (GC), one of the most critical steps is getting the sample into the GC. You might already understand gas flow paths and general instrument operation—but none of that matters if your sample isn’t prepared correctly.
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