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ASTM-C1204:2008 Edition

ASTM-C1204:2008 Edition

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C1204-02(2008)e1 Standard Test Method for Uranium in Presence of Plutonium by Iron(II) Reduction in Phosphoric Acid Followed by Chromium(VI) Titration

Published By Publication Date Number of Pages
ASTM 2008 9
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1.1 This test method covers unirradiated uranium-plutonium mixed oxide having a uranium to plutonium ratio of 2.5 and greater. The presence of larger amounts of plutonium (Pu) that give lower uranium to plutonium ratios may give low analysis results for uranium (U) (1) , if the amount of plutonium together with the uranium is sufficient to slow the reduction step and prevent complete reduction of the uranium in the allotted time. Use of this test method for lower uranium to plutonium ratios may be possible, especially when 20 to 50 mg quantities of uranium are being titrated rather than the 100 to 300 mg in the study cited in Ref (1) . Confirmation of that information should be obtained before this test method is used for ratios of uranium to plutonium less than 2.5.

1.2 The amount of uranium determined in the data presented in Section 12 was 20 to 50 mg. However, this test method, as stated, contains iron in excess of that needed to reduce the combined quantities of uranium and plutonium in a solution containing 300 mg of uranium with uranium to plutonium ratios greater than or equal to 2.5. Solutions containing up to 300 mg uranium with uranium to plutonium ratios greater than or equal to 2.5 have been analyzed (1) using the reagent volumes and conditions as described in Section 10.

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 8.

PDF Catalog

PDF Pages PDF Title
1 Scope
Referenced Documents
Summary of Test Method
2 Significance and Use
Interferences
Apparatus
Reagents
3 Hazards
Calibration
4 Procedure
5 Calculation
6 Precision and Bias
Keywords
7 A1. INTERFERENCES IN THE URANIUM TITRATION WITH TREATMENT STRATEGY
A1.1
TABLE A1.1
A2. TREATMENT OF PHOSPHORIC ACID TO OXIDIZE REDUCING SUBSTANCES
A2.1
A2.2
X1. POLYETHYLENE BOTTLE WEIGHT BURET PREPARATION
X1.1
8 X2. PLATINUM ELECTRODE TREATMENTS
X2.1
X2.2
X2.3
X3. TITRANT SOLUTION STANDARDIZATION
X3.1
X3.2
X4. DISSOLUTION OF URANIUM METAL
X4.1
X4.2
X4.3
X4.4
X4.5
X4.6
X4.7
X4.8
X4.9
X4.10
X4.11
X4.12
X4.13
X4.14
9 REFERENCES

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