What are the metal contents of the silica used in Cogent TYPE-C HPLC columns – FAQ

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ARTICLES, APPNOTES, FAQ (9289)
- AppNotes Library (1888)
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- Frequently Asked Questions?? (3402)
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October 8, 2012
Bill Ciccone

ARTICLES, APPNOTES, FAQ / HPLC Column Information / Silica-C FAQ / TYPE-C Column Information / TYPE-C in General FAQ

Metal impurities testing via ICP (Inductively Coupled Plasma) analysis is performed for the following, along with acceptance specifications:

—Al: Not more than 5.0 ppm
—Fe: Not more than 20.0 ppm
—Ti: Not more than 0.5 ppm
—Mg: Not more than 5.0 ppm
—Ca: Not more than 15.0 ppm
—Na: Not more than 20.0 ppm

It is important to note that the actual levels may be significantly lower then those in the table.

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