38

Sept. 12, '49

Preparation of Enriched Cd^III Sample

Quantity 1.5 gms of CdS (M.W. = 144.47) ~ 80% of Cd^III.

Will prepare 3 c.c. of CdSO₄ solⁿ:
Molarity = = 3.46 ✓

(a) CdSO₄ will be obtained by boiling CdS in 20%
H₂SO₄.

(b) Add sufficient amount of MnCl₂ into it

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Recovery of CdS

(a) CdSO₄ + MnCl₂ solⁿ will be [blank space] by
NH₄OH

(b) Mn will be Manganous salt will be oxidized
to manganic salt & precipitated out by HMn₄OH KMnO₄ which will be
added such that the solⁿ appears a little bit biolet.

(c) After filtering out the manganic salt, decolor [thi?]
solⁿ by adding a little K₂⋅O₂