Abstract
Several kinds of tea, camomile and herbal tea were analysed to determine natural and artificial radioactivity. The radionuclides were determined by alpha (210Po) and gamma (228Ac, 214Pb, 214Bi, 210Pb, 40K and 137Cs) spectrometry. 228Ac ranged between 0.6 and 9.0Bq kg−1dry; 210Po between 1.90 and 36.1Bq kg−1dry; 214Pb and 214Bi between 0.7 and 4.9Bq kg−1dry; 210Pb between <10.0 and 58.9Bq kg−1dry; 40K between 463 and 936Bq kg−1dry; 137Cs between <0.3 and 2.6Bq kg−1dry. The percentage of 210Po extraction in infusion was also determined; the arithmetical mean value of percentage of 210Po extraction resulted 20.7±7.50.
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