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DEVICES AND METHODS OF CONTROL COMPENSATION OF SYNCHROTRON RADIATION BEAM INTENSITY ALTERATION WHILE MEASURING SPECTRA OF BIOLOGICAL SAMPLES WITH XRF SR METHOD A.V. Sidorina, V.A. Trunova . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 CHOICE OF CONDITIONS FOR THE NATURAL WATER ANALYSIS USING A TOTAL REFLECTION X-RAY FLUORESCENCE SPECTROMETER G.V. Pashkova, A.G. Revenko . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 SCINTILLATION SPECTROMETER SBL-1 FOR THE X-RAY DENSITOMETER OF RADIOACTIVE TECHNOLOGICAL SOLUTIONS M.P. Belousov, M.A. Gorbunov, S.V. Dudin, O.V. Ignatyev, S.G. Morozov, A.A. Pulin. . . . . . . . . . . . . . . . . . . . 21 PUBLICATIONS ON X-RAY FLUORESCENCE ANALYSIS IN THE JOURNAL “ANALYTICS AND CONTROL” A.G. Revenko. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 QUALITATIVE ELEMENTAL ANALYSIS USING A CROSS-CORRELATION FUNCTION S.V. Pankratov, V.A. Labusov, O.A. Neklyudov. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 ANALYSIS OF HIGH-PURITY TUNGSTEN OXIDE AND CADMIUM TUNGSTATE CRYSTALS BY ATOMIC EMISSION SPECTROMETRY USING ION EXCHANGE TUNGSTEN SEPARATION N.P. Zaksas, L.N. Komissarova, P.S. Galkin, A.P. Zubareva . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 OPTIMIZATION OF CONDITIONS FOR SAMPLE PREPARATION OF CARBONACEOUS GEOLOGICAL SAMPELES FOR SUBSEQUENT MASS SPECTROMETRY WITH INDUCTIVELY COUPLED PLASMA ANALYSIS Yu.V. Anoshkina, E.V. Asochakova, O.V. Buharova, V.I. Otmahov, P.A. Tishin . . . . . . . . . . . . . . . . . . . . . . . . . 47 DETERMINATION OF VOLATILE PETROLEUM HYDROCARBONS IN SOIL BY SOLID-PHASE MICROEXTRACTION AND GAS CHROMATOGRAPHY/MASS SPECTROMETRY E.S. Brodsky, O.L. Butkova, A.A. Shelepchikov, G.A. Kalinkevich, Е.Ya. Mir-Kadyrova, D.B. Phesin, V.G. Jilnikov . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 GAS-CHROMATOGRAPHIC ANALYSIS OF CHAMOMILE (CHAMOMILLA RECUTITA R.) L.V. Pavlova, I.A. Platonov, V.G. Arhipov, V.A. Kurkin, I.Y. Roschupkina . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 ELECTRODIALYTIC GENERATOR OF HYDROXYDE ELUENT IN ION CHROMATOGRAPHY V. Gursky, O. Kurtova . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 MICROEXTRACTION PRECONCENTRATION OF IMPURITIES WITH ULTRASONIC DISPERSION OF EXTRACTION SOLVENT V.A. Krylov, V.V. Volkova, O.A. Saveleva . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 PRECONCENTRATION AND DETERMINATION OF COPPER, ZINC AND CADMIUM CHELATING MODIFIED SORBENT R.Z. Zeynalov, S.D. Tatayeva, N.I. Atayeva . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 CELLULOSE SORBENTS MODIFIED THIOSEMICARBAZONE THIOPHENE-2-CARBALDEHYDE, THIOSEMICARBAZONE 5-NITROTIOFEN-2-CARBALDEHYDE FOR SOLID-PHASE EXTRACTION AND DETERMINATION OF HEAVY METALS Dj.N. Konshina, Z.A.Temerdashev, D.I. Salov, V.V. Konshin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 ABSOPTION-SPECTROSCOPIC DETERMINATION OF RHODIUM USING HETEROCYCLIC AZOCOMPOUND Z.M. Arabova, N.V. Valentinovna, Yu.M. Dedkov . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 DETERMINING OF MICRO-QUANTITY OF IRON IN FRUITS H.D. Naghiyev, F.E. Esphandi*, R.A. Aliyeva, U.A. Gullarli, F.M. Chiraqov . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Compensation of synchrotron radiation beam intensity alteration while measuring spectra of biological samples with XRF SR method