Adsorption chromatography columns degradation

FIGURE 10.8 Rapid degradation of adsorption chromatography columns [reprinted with permission of Supelco, Bellefonte, PA 16823 (USA)]. 

To prevent an undesirable degradation of the compounds to be analyzed, glass columns have mostly been used for gas chromatography of alkaloids because they are indifferent to the compounds. Possible catalytic decomposition of sensitive compounds and adsorption phenomena caused by metal columns, e.g. copper, aluminium and stainless steel, may, however, be eliminated in some cases by a simple coating of the tubing material with the stationary phase... 

---