Ghost-Buster column
In HPLC analysis, especially in gradient elution, some unexpected peaks, which are usually called Ghost peaks, may appear in a chromatogram. Ghost peaks my appear for many reasons, including residu...
Browse Products by Field
Welch Materials develops and manufactures chromatography consumables including HPLC columns, Solid Phase Extraction (SPE) columns, GC columns, sample vials, syringe filters, and chromatographic media.
Welch Materials was established in 2003 in Shanghai, China. We are experts on bonding chemistry and innovative packing materials for chromatography applications. Through the optimal utilization of our resources, we have developed many innovative chromatographic consumable products, including HPLC columns, SPE products and QuEChERS. UltisilTM, Welchrom®, Xtimate® and TopsilTM are registered trademarks of Welch Materials. Over the past several years, these high quality products have become widely accepted by analytical chemists in many countries, especially in China, US, and Europe.