SR-XRFA in botanical research: Elemental composition of species of the genus Syringa (Oleaceae) under technogenic impact in Novosibirsk

Experimental. The hinge-plates of air-dried plants and soil (1 g) were crumpled up in an agate mortar and pressed as tablets of a diameter of ~ 1 сm weighing 30 mg (of a surface density of 0.04 g/сm2). The elements were determined using the SRXRF method at the station of element analysis (VEPP3 store ring) of the Siberian Center of Synchrotron and Teraherz radiation, INP, SB RAS. The samples were measured at an exciting radiation energy of 23 keV. The duration of each measurement varied from 300 to 500 s for vegetation and soil hinge-plates. Synchrotron radiation was monochromatized with a monochromator based on a silicon crystal of the “butterfly” type with working planes (111). Fluorescence radiation was recorded using a detector PentaFET (Oxforf Instruments) with an energy resolution of about ~135 eV (Fe Кα line; 5.9 keV). The main characteristics of the experimental station and the methodical aspects of the work are described in (Daryin, Rakshun, 2013; Experimental station...).