655
EI,IZ.LBETH A . ATKISSON
.\SD E D G A R F. SMITIr
8 S . m per cent., giving as a iiieaii SY.1 2 per cent. A third pol-tion, iveigliing 0.3363 gram, \vas heated for fifteen iiiiiiutm over a Hullsen flame; the increase i i i \veight was 0.0119 grxni, ant1 heating again for forty-five iiiiriutes there resulted a11 alteratioii of 0 1 1 1 ~ .0.001I grain, after which the \veiglit coiitinurd coiistnnt. Tlir total increase of the material taken 1)). its conl.ersioi1 into uraiio-uranic oxide, was tlierefore 0.0130 grain, while the calculated iiicrcase should be O . O I 3 2 graili. ~
..
[ C O X T K I U U T I O X F R O M THK
JOHS CHEXISTRY.
.~
IT.\RKISOX LAIIOK.ITOKS OF NO.6.1
THE SEPARATION OF IRON FROn BERYLLIUn.
T
HIS separation is generally effected through the solubility of beryllium hydroxide in aiiinioniuiii carlioriate. I t is, however, not always satisfactory, and a n y method affordirig better results will be of interest to the analyst. Ilinski and v. Knorre' called attention to the use of nitroso-/jiiaplitliol j i i aiialytical lvork. For example, t h e y separntetl cobalt from nickel antl iron from aluiiiiiiuni by ineatis of this reagent. Inasriiuch as their stud!. has not been continued. it seeiiied to u s of interest to ascertaiii ivlietlier or not the same reagent could be used for the separation indicated at the head of this coniniunicatioii. IVe u s e d the following solutions: ( I ) a fift!. per ceiit. acetic acicl solutioii oi the iiitroso-/j-n:iphtliol, ( 2 ) a ferric solutioii of \vliicli tcii ciibic centimeters contaiiietl 0.1278 gram of ferric oxide, antl finall>- a beryllium chloride solution of ivliich ten cubic centimeters coiitained 0.1248 gram. The first step taken \vas to learn Iio\v coiiipletely the iron \vas precipitated b y the proposed reagent. To this elid ten cubic celltimeters of the ferric solution (=a. 1 2 7 8 grain Fe,0,3)rvere diluted with two hundred cubic ceiitiiiieters of distilled water, and one hundred am1 hventy-five cubic ceritiaieters of the nitroso/J-iiaphthol added to the cold liquid, \vliich !vas then ailowed to statid for a period of tlventy-four hours. ?'he iron precipitate was then filtered out, \vaslied a t first \\it11 fifty per cent. acetic acid, antl suljsecluetitl>-with water, until a few drops of the washings left 110 residue up011 evaporatioii and ignition upon a strip 1 Bo. (1.
rhc V I . C
