APPENDIX A. RADIOCHEMICAL PROCEDURES CALCIUM by R. Jensen, F. Celio, and P. Ww. Krey A.1 INTRODUCTION The calcium is separated from the majority of the fission products by a palladium sulfide scavenging, a calcium carbonate precipitation, . and several ferric hydroxide scavengings. Further purification is effected by several barium and strontium nitrate scavengings followed by two additional ferric hydroxide scavengings. The calciwn is finally precipitated and mounted for counting as the calcium oxalate monohydrate. The chemical yield averages about 25 per cent. REAGENTS 10 Ca carriers standardized 10 Fe carrier: 10 Pd carrier: Ba carriers 10 Sr carrier: 10 mg Fe/ml fedded as FeCly.2H20 in dilute HCl) mg Pd/ml (added as PdClp.2H90 in dilute HCl) mg Ba/ml (added as ba(NOs)2 4n H20) mg Sr/ml (added as Sr(NO3)2 in H20) E28 3 gas. NHyCH : conece HNO3 3 K2C03 . saturated aqueous solution fuming, conc., 6M : (NHI) 20204: saturated aquecus solution 95% Sthanol 3 Ethyl ether PREPARATION SOE Ore f 0.1% solution Aerosol Of: A.3 mg Ca/ml (added as Ca(NO3)5.4H20 in H20 AND STANDARDIZATION OF CARRIER Dissolve 59. 0 g of Ca(N03}2.4H30 in H20, add 5 ml of conc, HNO3 47 SECRET - RESTRICTED DATA APETEN REP bi A.2