wu ey teeth eet ee Cakes mm . sp E3MRBLCTT hem watt ed mev_ ise an nerd «1. 4 “ALY sie : Lew Lr * ' ts the oa Manta: direct ye 7 ris seluticr . - =r. af ~ ~ ~ rene esh “= ‘ in HNOs. dilution to sviterie velume and detlermmincvicn of strontium a 4 “ . . 1% ae z « J * a on . conten Lame pastometrys This mevhad is svoject tc errors cf~ y extraneous clements in Une solution. The depree of t ion was determined by tne additicn of knom quantities of strontium to solutions of bone ash which Lad previously been measurea. oa The cirect analysis did not hare sufficient sensitiwmty, so the separation of strontium from calcium was made by a double nitrate precicvitetion. The results of the first set of tests on sriked bone samzles ére shown in Teble A-d. Teble Awol Hecovyery of Strantiium Samole Ne. er Agied Sr Feun4 & O mg - O me A 2 10 3 ly 765 rae 30 C 75 29 eh sa) 103 Ry L? ou fu a Tne Low recovery of the 10 mz quantity and the absence of etrontiun in the nemspiked sanpie is attrabutec to the lack of suitable mate eriel te form sufficient precinutate to carry dewn the low concer ration cf strontium. Itais sugested that 10 mg of barium be uscd s @ collecting agent for lew contentrations cf strontium. With the carrier, the rescverv for low strontium was broveht we te ever SO%. <A set ef spiked bane: were run at Lower strentctu Levels, with the results shown in Tatle 4-3, ao c Lot Sqrorntiuc Heccvers (perdu Carrier =. a. weet yr FE 06M" eC Aycan Sel ns w™ > - nm - Vag ai we We t om waa we eel ~ ~ Ce u oe = 1 me a Ane ~ vom? fF omy 4 - r u enw a eee * . tT foar ede pus Ree of sro ee * o OPfescair wee ret bal TOOTS OM a 2 ~9 “3 + a ' wou - ~ - oo mot: . ~ orn * GQ -~ E ct nt Yr a a * “ ks . a ae ad deh! ~ “ arrae ~ ~ - 1 ST fa OTe “ 2 op Rhee Wet soe MeL. eV Loar ad Lie Phe