Chromatographic Purification of Tritiated Steroids Prior to Use in Radioimmunoassay

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Abstract
The purity of tritiated steroids used as reagents in radio immunoassay plays an important role in the reliability of the assay. These radioactive reagents should be assessed for purity upon receipt and the purity should be checked periodically afterward. For such purposes, we have used chromatographic purification on Celite microcolumns. By charging the polarity of the stationary and mobile phases, 20 different tritiated steroids with a wide range of polarity could be purified on these microcolumns. This approach is easy, rapid, economical, and reliable.

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