Column heading	Explanation	Units	Notes 	
Code	Database serial number - unique ID	n/a		
Identifier	UIAR unique label - chemical analysis number. 	n/a		
Date_of_Pu_measurement	Date of measurement (long date format)	dd-mmm-yy		
Terrestrial_density_of_soil_contamination_with_238Pu_kBq_m-2	238Pu contamination in soil expressed on an aerial basis	kilo bequerels per square metre	For determination of plutonium radioisotopes at a given site, one of the homogenized 100 cm3 samples was used. After heating at 450 °C overnight, the samples were boiled for 4 hours in 6M HNO3. Plutonium radioisotopes were extracted by a standard radiochemical method (Pavlotskaya, 1997). Activities on the plates were measured using a Soloist alpha-spectrometer equipped with a Soloist-U0300 detector (EG&G ORTEC, USA).	
Relative_uncertainty_238Pu_%	Relative uncertainty of determination (at 95% confidence interval)	percentage		
Terrestrial_density_of_soil_contamination_with_239_240Pu_kBq_m-2	239,240Pu contamination in soil expressed on an aerial basis	kilo bequerels per square metre	For determination of plutonium radioisotopes at a given site, one of the homogenized 100 cm3 samples was used. After heating at 450 °C overnight, the samples were boiled for 4 hours in 6M HNO3. Plutonium radioisotopes were extracted by a standard radiochemical method (Pavlotskaya, 1997). Activities on the plates were measured using a Soloist alpha-spectrometer equipped with a Soloist-U0300 detector (EG&G ORTEC, USA).	
Relative_uncertainty_239_240Pu_%	Relative uncertainty of determination (at 95% confidence interval)	percentage		
Column heading explanations for 2_Plutonium_isotope_measurements.csv

References
Kashparov V.A., Lundin S.M., Zvarich S.I., Yoschenko V.I., Levtchuk S.E., Khomutinin Yu.V., Maloshtan I.N., Protsak V.P. Territory contamination with the radionuclides representing the fuel component of Chernobyl fallout  //The Science of The Total Environment, vol.317, Issues 1-3, 2003, pp. 105-119.
Pavlotskaya, F.I.: Main principles of radiochemical analysis of environmental objects and methods of measurements of strontium and transuranium elements radionuclides. Journal of analytical chemistry, 52 (2), 126-143. (In Russian), 1997.