Gemini pH Flexible LC Columns by Phenomenex Inc

"Column is very useful with a wide pH range of mobile phase. Column life is also excellent after so many injections. Separation of peaks are very nice."

"Easy to use column with reliable performance over a long period of time and use."

"These columns can be used over a wider range of pH, which makes them much more versatile than the classical silica-based columns. Furthermore, they come in a brad range of bonded phases, particle sizes, pore sizes and dimensions. i found the Gemini SAX particularly useful because I can combine both the ionic strength and the pH of the mobile phase, to impact the selectivity, thus achieving optimal resolution of all my analytes with shorter run times."

"I have worked with Phenomenex Gemini C18 and Phenomenex Phenyl C6 and obtained very good separation of compounds with aromatic rings, namely phenolics in plant materials (mobile phase of 01.% formic acid + acetonitrile). Phenyl C6 is better if you aim a good selectivity between isomers."

"I have some compounds that I can measure only at high pH. This column is a good choice for longer column lifetime."

"Perfect company, good business and cooperation. Easy to use columns, high resolution, easy to clean. Will recommend to my colleagues and partners with pleasure and without hesitation. I believe it has an excellent future. "

"I like to use this column because it has good selectivity. The life time is long. It is available for pharmaceutical molecules. The contact person is helpful."

"I have always been happy with Phenomenex columns. The columns work as advertised and if there is any problem, Phenomenex is always willing to provide post sales support."

"These columns are very easy to use. They are versatile and can analyze a wide variety of compounds. I use them for environmental samples and for multiple drugs whether they are acidic or basic."