Abstract
Two types of Egyptian cements: sea water cement and slag cement were examined for the elements inducing long-lived gamma radioactivity on irradiation in the reactor. A radiochemical separation procedure has been worked up, which is suitable for cement samples with high iron content. For quantitative determination of certain trace elements in cement by activation analysis, W-1 has been applied as a reference standard. Cement tagged with irradiated Sc 2 O 3 , ZnO or sea water cement has been recommended for location of cement tops and other investigations on oil wells.
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