Archive for the ‘Lab Hacks’ Category

It May be Hot Outside, but Your Headspace Analysis Can Still Suffer from the Cold

Summer days are my favorite – hot, sunny, and full of fun. But one thing that’s really not fun is trying to track down contamination and/or carryover in your headspace-GC (HS-GC) system. I get questions about this topic pretty regularly, so I thought I would post a blog on the most common culprit for contamination […]

Looking for a Cryogenic Valve for your Shimadzu GC-MS?

I was working on a project for volatile sulfur analysis. It took so long to cool the GC oven to 30 °C, and yet the most volatile analytes were still difficult to separate. At that time, I realized that I needed a cryogenic cooling system for my Shimadzu GC-MS QP2010 plus! However, I was not as excited as […]

Lab Hack: Quickly Reducing GC Inlet Pressure on an Agilent GC Prior to Changing the Septum and/or Inlet Liner

Have you ever been changing your Agilent GC inlet liner (you do change that routinely, right?), particularly a single taper with wool type, and pulled it out to see the wool at the top of the liner (Figure 1) when it should be at the bottom of the liner (Figure 2), the proper placement where […]

Calculating your GC Column Length with the Restek EZGC Method Translator and Flow Calculator

Determining your GC column length is important so that electronic pneumatic control of carrier gas flow is accurate, whether during initial installation of the column or after maintenance column trimming. Otherwise, you can have more flow going into the detector than you think (especially problematic in MS as you might lose sensitivity) or even see […]

Keep up with ChromaBLOGraphy — new subscription option added

I love it when a new post goes up here on ChromaBLOGraphy, because I know I’m going to learn something. The problem is, it’s all too easy to miss something. I’m happy to announce that there are now two ways to make sure that doesn’t happen to you. We give you the options of subscribing […]

Tube Labeling Lab Hack – Stop Squinting at Destroyed Labels!

Centrifuge tubes go through a lot of abuse during extractions. Because of all of this handling, your careful labeling can be lost due to rubbing off in a shaker or centrifuge, or from solvent leakage from the top of the tube. Sometimes if you squint, you can tell what was written on the destroyed labels, […]

QuEChERS Weigh Lab Hack

Use a 150 mL beaker to hold your QuEChERS 50 mL centrifuge tubes for weighing samples out.  Put the spout of the beaker towards your weigh hand (I’m a lefty, as you can tell from the photos), and then allow the tube to set in the spout, which will angle the tube perfectly for your spatula […]