METHODS OF PREPARING REFERENCE SOIL SAMPLES FOR NON-DESTRUCTIVE XRF-ANALYSIS

Experimental studies of the selection of the most optimal homogenization, sample preparation procedure, and sample pressing parameters have been conducted. Reference samples were selected including eference standards with certified values of the content of elements and oxides. For enhancement of concentration ranges determined, 8 background samples with the most typical chemical composition in the STS territory were additionally selected. The content of elements in samples was certified by mass- and atomic emission spectrometry (ICP-MS and ICP-AES). Pressed pellets were prepared, a semi-quantitative X-ray fluorescent analysis (XRF analysis) of 8 samples with the known content was carried out by the ‘best detection’ to identify systematic discrepancies in determining compositions of samples using a destructive and non-destructive analytical technique and sample preparation.

1. Ditcz A.A., Khabas T.A., Revva I.B. Opredelenie elementnogo sostava veshhestva metodom rentgenofluoresczenczii. Izd-vo Tomskogo politekhnicheskogo universiteta, 2013.

2. Yiannis Fiamegos, Maria Beatriz de la Calle Guntiñas. Validation strategy for an ED-XRF method to determine trace elements in a wide range of organic and inorganic matrices based on fulfilment of performance criteria. Spectrochimica Acta Part B: Atomic Spectroscopy. Volume 150, December 2018, P. 59–66. https://doi.org/10.1016/j.sab.2018.10.009

3. Chernorukov N.G., Nipruk O.V. Teoriya i praktika rentgenofluorestsentnogo analiza. Nizhegorodskiy gosudarstvennyy universitet im. N.I. Lobachevskogo, 2012.

4. Shirkin L.A. Rentgenofluorestsentnyy analiz ob"ektov okruzhayushchey sredy: uchebnoe posobie. Vladim. gos. un-t. – Vladimir: Izd-vo Vladimirskogo gosudarstvennogo universiteta, 2009. – 65 p.

5. Titarenko A.V., Tsvetyanskiy A.L., Eritenko A.N. Izgotovlenie repernykh obraztsov dlya rentgenofluorestsentnogo analiza. Analitika i kontrol'. 2008. – Vol. 12. – No. 1–2.

6. Mukhanova A. A. X-ray fluorescence determination of heavy metals in water-organic media: thesis. ... PhD in tekh. sci : 02.00.02 Moscow, 2006 160 p. RGB OD, 61:07-5/1692.

7. Kachinskij N.A. Mekhanicheskij i mikroagregatny`j sostav pochvy`, metody` ego izucheniya. – Moscow: Izdvo AN USSR, 1958. – P. 25. – 191 p.

8. Revenko A.G. Use of standard reference materials in XRF analysis of geological samples. // Reference. Standard samples. 2013.

9. Abramov A. V. Probopodgotovka krasnogo shlama dlya rentgenofluorestsentnogo analiza metodom splavleniya s litiy-boratnymi flyusami / A. V. Abramov, A. V. Sukhorukov, A. Yu. Zhilyakov // Fizika. Tekhnologii. Innovatsii: sbornik nauchnykh trudov. – Ekaterinburg: [UrFU], 2015. – Issue 1. – P. 9–14.

10. Rentgenofluoresczentny`j analiz. Primenenie v zavodskikh laboratoriyakh. Sb. nauchny`kh trudov: Per. s nem./Pod red. E`rkhardta Kh. – Moscow: Metallurgiya, 1985. 253 p.

11. Kouzov P.A. Osnovy analiza dispersnogo sostava pylej i izmel'chennyh materialov. – Leningrad.:Khimiya,1987.– 264 p.

12. Tutorial. North Caucasus Federal University, Stavropol, 2017.

13. Kos'yanov, P. M. Rentgenofizicheskiy analiz neorganicheskikh veshchestv slozhnogo khimicheskogo sostava: monografiya / P. M. Kos'yanov. – Tyumen': TIU, 2016. – 195 p.

14. Losev N.F., Smagunova A.N. Osnovy rentgenospektral'nogo fluorestsentnogo analiza. Moscow: Khimiya, 1982. 206 p.

15. Ozhogina E.G., Lebedeva M.I., Gorbatova E.A. Interlaboratory comparison tests in mineralogical works. Benchmarks. Standard samples. 2017;13(2):37-47. https://doi.org/10.20915/2077-1177-2017-13-2-37-47

16. Suvorova D.S. Vybor optimal'nykh usloviy i razrabotka metodik rentgenofluorestsentnogo opredeleniya malykh soderzhaniy redkikh elementov v gornykh porodakh. Dissertatsiya. Institut zemnoy kory Sibirskogo otdeleniya rossiyskoy akademii nauk. Irkutsk, 2017. 127 p.