A Text book of Assaying: for the Use of Those Connected With Mines
A Text book of Assaying: for the Use of Those Connected With Mines
C Cornelius Beringer
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9 Effect of Varying Phosphate. " Phosphate " solution added 10. 0 c. C. 20. 0 c. C. 50. 00. 0. Loo. Oc. C. " Uranium " required . . 9. 8 18. 9 47. 6 94. 5 The quantity of phosphoric oxide in the assay solution for the conditions of titration should not be much less than 0. 05 gram. * For the details of the titration, the student is referred to the same place. PHOSPHORUS AND PHOSPHATES. 399 For smaller quantities the uranium solution should be diluted to half its strength, and the assay solution... concentrated by reducing its bulk to 50 c. C. And using 2. 5 c. C. Of the sodium acetate and acetic acid solution. Determination of Phosphoric Oxide in Apatite. Weigh up 0. 5 gram of the dried and powdered sample, and dissolve ifc in 5 c. C. Of hydrochloric acid. Evaporate to a paste, add 5 c. C. Of the sodic acetate and acetic acid solution, dilute to 100 c. C. With water, boil, and titrate with uranium acetate solution. In an example, 0. 5 gram of apatite required 37. 4 c. C. Of uranium acetate solution (standard equal to 0.
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