Instrumental neutron activation methods are suggested in order to carry out automatic analysis of fertilizers and plant samples for N, P, K and Si allowing for the investigation of more than 40 samples per 8 hours. The experimental errors do not exceed ±3% for N, ±6% for P, ±5% for K and ±15% for Si.
Authors:B. Anisimov, Yu. Bourmistenko, I. Ivanov and V. Philippov
A mathematical model is suggested for the approximation of the monoenergetic gamma-ray spectra obtained by a Ge(Li) detector.
Some features of the instrumentation monoline spectra in the energy range upto 2 MeV are considered in detail. Computer program
“APPROXIMATSIYA” is described. The program allows to determine the parameters of the mathematical model with the purpose to
construct a making up standard spectrum library. The results of the monoline spectrum processing are discussed.
Authors:N. St. Kalmykov, A. Arhipov, A. Abramov, N. Ivanova, B. Iofa, O. Pronina, Yu. Sapozhnikov and A. Anisimov
Liquid-liquid extraction of several cations by some oxa-tia- and tia-crown ethers was studied. Sr(II), Pb(II) and Ag(I) were
taken as hard, borderline and soft Lewis acids, respectively. Trace amounts of210Sr and110mAg were used as chemical yield monitors. The results were explained by the Pearson theory. Some of the examined compounds
posses high affinity towards Ag(I) and Pb(II) extraction. The distribution coefficent for Ag(I) reached the value of 140.