19.10.2015 Views

Yttrium-90 and Rhenium-188 Radiopharmaceuticals for Radionuclide Therapy

Pub1662web-89688003

Pub1662web-89688003

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

TABLE 4.3. ELECTROLYTIC YIELD OF <strong>90</strong> Y<br />

Batch No.<br />

Sr-<strong>90</strong><br />

(MBq (mCi))<br />

Expected Y-<strong>90</strong><br />

(MBq (mCi))<br />

Y-<strong>90</strong> recovered<br />

(MBq (mCi))<br />

Y-<strong>90</strong> (%)<br />

1 555 (15) 555 (15) 516 (13.9) 93.0<br />

2 555 (15) 515 (13.9) 464 (12.5) 89.9<br />

3 555 (15) 555 (15) 504 (13.6) <strong>90</strong>.8<br />

4 925 (25) 925 (25) 830 (22.4) 89.7<br />

5 925 (25) 892 (24.1) 818 (22.1) 91.7<br />

6 1110 (30) 1110 (30) 1030 (27.8) 92.8<br />

7 1110 (30) 1091 (29.5) 973 (26.3) 89.2<br />

8 1850 (50) 1850 (50) 1692 (45.7) 91.4<br />

9 1850 (50) 1850 (50) 1661 (44.9) 89.8<br />

The amount of waste generated after every milking was:<br />

——<br />

General waste: 200.05 mL;<br />

——<br />

Strontium containing waste: 365.00 mL (the strontium content in this waste<br />

was not significant <strong>and</strong> was of the order of a few microcuries).<br />

The minimum volume of <strong>90</strong> YCl 3 in the product vial that could be obtained<br />

was 0.36 mL. For washing <strong>and</strong> decontamination steps:<br />

——<br />

Acid wash: 1.0M HNO 3 ;<br />

——<br />

Solvent: water <strong>for</strong> injection.<br />

4.3.3. Recovery of <strong>90</strong> Sr from waste<br />

Although loss of strontium during the regular operation of the module<br />

was not high <strong>and</strong> because <strong>90</strong> Sr is not very expensive, software (SCADA)<br />

was incorporated <strong>for</strong> recovering <strong>90</strong> Sr from the radioactive waste. Figure 4.6<br />

presents the elution profile of <strong>90</strong> Sr recovery from waste after passing it through<br />

two different columns prepared with strong cation exchange Dowex 50 resin<br />

64

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!