Aktivierungsanalytische Bestimmung von Verunreinigungen in Molybdän und Wolfram

Döge, H; Groβe-Ruyken, H.

doi:10.1080/10256016808551981

Cited by 8 publications

(1 citation statement)

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“…An improvement can be achieved only by using radiochemical separations. Radiochemical neutron activation analysis (RNAA) based on different separation principles has been applied to the determination of individual elements (19)(20)(21)(22)(23) or of a rather small group of elements between 2 and 11 (24)(25)(26)(27)(28)(29)(30). In many instances, the limits of detection are not sufficient for molybdenum of high purity, and/or the separation procedure is relatively complicated.…”

Section: Introductionmentioning

confidence: 99%

Determination of uranium, thorium, and 18 other elements in high-purity molybdenum by radiochemical neutron activation analysis

Theimer¹,

Kriváň²

1990

Anal. Chem.

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A radlochemkai neutron acthratlon analysis technlque for the determination of uranium and thorium In high-purity molybdenum via the lndlcator radionuclides 290Np for U and 23sPa for Th has been developed. S k n u l t a w , the ebments Ag, Co, Cr, Cs, Cu, Fe, Ga, In, Ir, K, Mn, Na, NI, Rb, Ru, Sc, Se, and Zn can be determined, too. The elements Hf, Sb, Ta, Sn, and W were determined by instrumental neutron activation analysis. The radloclremical separatlon Is pertormed by anion exchange on a Dowex 1 X 8 column from a 20 M HF/3% H,02 medlum. A h i t of detection of 4 ng/g for uranium and 40 pg/g for tholkwn can be achleved. For the other elements, the limns of detection are between 1 pg/g and 100 ng/g. A m o d W more seiectlve separatlon of the Indicator radlonuelide of Th, =Pa, alkws improvement d the lknit d detecth for Th by a factor up to 5. Thls technique was appHed lo the analysis of high-purity molybdenum, and the results of a number of elements were compared with those of other technlques.

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Section: Introductionmentioning

confidence: 99%