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Radium being the parent of radon, its concentration can beObtained by measuring built up radon concentration in radonBubblers. Pre concentrated water sample of about 70 ml wasTransferred to the radon bubbler is shown in Fig. (2). A vacuumPump was connected to the bubbler and air was suckedThrough the sample solution to scrub it for about 5 min. ThisWould purge the solution of dissolved 222Rn. The solution inThe blubber was then allowed to stand for a known period ofAbout 21 days (about 3E5 half lives of 222Rn) for enough radonTo build up.
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