The Chinese manufacturer Welch Materials specializes in products for chromatography. Welch Materials develops numerous innovative product series, including the silica-based Ultisil® HPLC column series. Ultisil® columns offer a purity of > 99.999 % as well as tested and proven low contamination with trace metals. Excellent reproducibility, efficiency, symmetry and lifetime are big assets of Ultisil® HPLC columns.
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