Showing posts written by Bob Bickler
For chemists needing to purify natural product extracts or synthesis reaction mixtures flash chromatography is typically the tool of choice. In previous posts I have discussed various ways to optimize...
Recently, one of our readers wrote and asked how to determine solvent strength in normal-phase flash chromatography. This is an excellent question because solvent strength is one of several factors im...
In my previous post, I talked about the "Chemistry Behind Normal-phase Flash Chromatography", the most common form of liquid-solid chromatography. In this post, I focus on reversed-phase flash chromat...
For most organic and medicinal chemists flash chromatography is just another step in the synthesis work flow - react, analyze, purify, react, analyze, purify... until the final product is made. The de...
Reversed-phase flash chromatography usage is increasing rapidly. In fact, over the past 10 or so years, reversed-phase flash chromatography use has increased a dramatic 650%! This is amazing growth de...
Flash chromatography competing with prep-HPLC? Why and when would flash outperform or even be equal to prep HPLC? Well, it depends on your purification needs and goals.
Getting the most benefit from your crude sample purification with column chromatography or flash chromatography involves optimizing many variables.
Synthetic chemists continually seek ways to create novel compounds. Along the way they evaluate reagents, solvents, and reaction conditions giving rise to various reaction products and by-products.
In this article I discuss the optimization of solvent ratios to generate ideal Rf (retention factor) values on TLC plates. Then I show how maximizing efficiency of flash chromatography achieves higher...
Flash chromatography can be complex. Solvent choice, column size, stationary phase, loading technique, gradient method, flow rate, and detection parameters are all variables which factor into flash ch...