ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Determination of small amounts of elements using radionuclide x-ray fluorescence analysis

E. Havránek and A. Bumbálová

Pharm. Fac., Komensky Univ., Bratislava

Abstract:  The determination of small amounts of elements by means of radionuclide fluorescent X-ray analysis is described. Samples containing 5 X 10^-4 — 5 X X 10^-6 g of elements were fixed on a suitable carrier. For a coaxial geometric arrangement a low-energy source of the type γ/X ²⁴¹Am/Ag (annular) with an activity 7.4 x 10⁸ s^-1 (20 mCi) and for a side-reflexive geometry a source of the type ß/X ¹⁴⁷Pm/Sm with the activity of Рт(ОН)_з ca 3.7 X X 10¹⁰ s ^-1 (1 Ci) were used as sources of radiation. Cs, Ba, La, Pr, Nd, and Ag were determined by means of the K _α  line and Hg, W, Er, and Pr by means of the line L_α. Accuracy of the method was expressed by relative standard deviation. For all elements studied the detection limit of order 10^-7 g was achieved.

Full paper in Portable Document Format: 296a750.pdf (in German)

Chemical Papers 29 (6) 750–761 (1975)