The features of beta spectra standardization for modern liquid scintillation counting (LSC) using Quantulus 1220TM alpha beta spectrometer are considered. The range of tasks is tritium measurement, beta-spectrometric determination of strontium-90, determination of strontium-90 by Che-renkov counting, determination of lead-210 in aerosol filters, radiocarbon studies.
The purpose of the study was to summarize and analyze the peculiarities of the application of the methods of spectra standardization of beta-emitters in the study of radioactivity of environmental objects based on liquid scintillation counting.
Materials and methods: liquid scintillation counting, LSC, Cherenkov counting, radiochemi-cal preparation of samples, spectra decomposition of beta-emitters.
Results: Methods for spectra standardization of beta-emitters samples were analyzed in the study of 3H, 14C, 90Sr, 210Pb in environmental objects using a modern Quantulus 1220TM liquid scintil-lation spectrometer. The acceptability, effectiveness and scope of application of the methods of stand-ardization and spectra decomposition for beta-emitters for liquid scintillation counting and Cerenkov counting are grounded.

Quantulus 1220TM, liquid scintillation treatment, LSC, spectra decomposition for beta-emitters, radiochemical sample preparation, tritium, lead-210, strontium-90, radiocarbon, 3H, 210Pb, 90Sr, 14C

1. Peng C. T. Sample preparation in liquid scintillation counting. In Advances in Scintillation counting. McQuarrie S.A., Edis C., Wiebbe L.I. (eds.). New York: Academic press, 1983. Ð. 279.

2. Quantulus. Measuring Extremely Low Levels of Environmental Alpha and Beta Radiation: Broshure. 12 p. http://www.jnhtech.com.tw/comm/up-file/p_041105_09392.pdf

3. Buzinny M. Environment and Health. 2001 ; 19(4) : 31-36 (³n Ukrainian).

4. M. Buzinny, Panasjuk N., Tsygankov N. Radiocarbon. 2006 : 297-303.

5. Neary M. P. Radioactivity&Radiochemistry. 1997 ; 8(4) : 23-25.

6. Buzinny M. G. Vyznachennia kontsentratsii trytiiu metodamy ridynno-stsyntyliatsiinoi lichby: metodychni rekomendatsii dlia vedennia sposterezhen za radioaktyvnym zabrudnenniam navko-lyshnoho seredovyshcha [Determination of Tritium Concentration by Liquid-scintillation Count-ing Methods: Guidelines for Monitoring Radioactive Contamination of the Environment]. Kyiv ; UkrNDGMI ; 2001 ; 172-181 (in Ukrainian).

7. Taylor C. Personal communication to author.

8. Buzinny M. G., Zelensky A.V., Los' I.P. Radiocarbon. 1993 ; 439-446.

9. Buzinny M. G. Standartyzatsiia ridynno-stsyntyliatsiinykh beta-spektriv [Standardization of Liquid Scintillation Beta Spectra]. In : Metrolohiia ta vymiriuvalna tekhnika (Metrolohiia-2006): mater. VI mizhnar. nauk.-tekhn. konf. [Metrology and Measurement Techniques” (“Metrology–2006”) : Conf. Mater.]. 2006 ; 2 : 281-285 (in Ukrainian).

10. Buzinny M., Los' I., Shepelevich K. Applied Radiation and Isotopes. 2000 ; 52 (4) : 905-910. DOI : https://doi.org/10.1016/S0969-8043(99)00142-6

11. Buzinny M. G. Metod korrektsii gasheniya dlya Cherenkovskogo scheta na osnove integralnoy skorosti scheta vneshnego standarta [Extinguishing Correction Method for the Cherenkov Account Based on the Integrated Calculation Rate of an External Standard]. In : Metody zhidkostno-stsintillyatsionnogo scheta v radioekologii : sb. nauch. tr. [Methods of Liquid-Scintillation Counting in Radioecology]. 1996 ; 2 : 13-19. DOI : https://doi.org/10.13140/2.1.4334.9446

12. Buzinny M. 2009. Simultaneous determination of 210Po and 210Pb using LS technique In : Inter-national Topical Conference on Po and Radioactive Pb isotopes. Sevilla, Spain. DOI : https://doi.org/10.13140/RG.2.2.15078.93760

13. Buzinny M. G. Radiocarbon. 2006 ; 215-220.

14. Gupta S. K., Polach H. A. Radiocarbon dating practices at ANU. Radiocarbon Laboratory: Re-search School of Pacific Studies. ANU, 1985. 173 p.

15. Buzynnyi M. G. Analiz beta-spektriv ridynno-scyntyliatsiinoho spektrometra shliakhom yikh standartyzatsii na osnovi zmishchennia i obchyslennia u bahatiokh viknakh [LSC Beta Spectra Analysis by Standardization Based on Shifting and Multi-Window Computing]. In : Hygiene of populated places. Kyiv ; 2014 ; 64 : 222-226 (in Ukrainian). DOI : https://doi.org/10.5281/zenodo.3551696

Buzynnyi M.G. Zastosuvannia metodiv standartyzatsii spektriv beta-vyprominiuvan v ridynno-stsyntyliatsiinomu lichenni [Application of Methods of Standardization of Beta-Radiation Spectrum in Liquid-Scintillation Treatment]. In : Hihiiena naselenykh mists : zb. nauk. pr. [Hygiene of Populated Places]. Kyiv ; 2021 ; 71 : 93-100 (in Ukrainian).