CHEMICAL ELEMENTAL COMPOSITION OF DATURA STRAMONIUM L. GROWING IN UZBEKISTAN

Abstract

Inductively coupled argon plasma mass spectrometry (ICP-MS) was used to study the elemental composition of the underground and aboveground parts of the Datura stramonium growing on the territory of the Republic of Uzbekistan. The obtained data show that 41 elements were found in the composition of the vegetative organs of the D. stramonium, including 6 macroelements (Ca, P, K, Na, S, Mg), 8 essential microelements (Co, Cr, Cu, Fe, Mn, Se, Zn, Mo), and 6 conditionally essential. Moreover, 6 trace elements (B, Si, Ni, V, As, Li), 16 toxic (Pb, Cd, Ge, Sr, Zr, Tl, Bi, Sn, Sb, W, Ag, Ba, Al, Ga, Ti, Be) and 5 little studied elements (Nb, Cs, Ta, Rb, Re) were identified. It was revealed that among the detected elements in D. stramonium, 3 macroelements (Ca, K and Fe) are contained in a concentration of more than 1000 mg/kg, 4 elements (P, S, Mg, Si) are from 100 to 1000 mg/kg, 3 elements (Na, Mn, B), ranging from 10 to 100 mg/kg and the rest were in the range of less than 10 mg/kg. The macroelements were located between each other in the following order: in the roots of the plant Ca (40%)>K (39%)>P (9%)>Mg (6%)>S (4%)>Na (2%), and in the aerial part of the plant Ca (50%)>K (30%)>Mg (9%)>P (7%)>S (3%)>Na (1%). The highest content of essential trace elements in the composition of the roots and aboveground parts of the D. stramonium falls on the share of Fe (n/h 2015.4521 mg/kg, n/h 1516.3041 mg/kg), and among the conditionally essential microelements Si (n/h 397.8607, n/ch 234.4246). It has been established that the higher content of toxic elements in the composition in the underground part of D. stramonium falls on the proportion of A1 (36.92%) and Ti (35.54%), and in the aboveground part of Ga (48.57%) and Al (17.37%), relative to the total content toxic elements. According to the content of salts of heavy metals of the D. stramonium growing in Uzbekistan meets the requirements established by the Global Fund XIV and WHO. Salts of toxic elements Hg were not found. Comparative data showed that in both organs of D. stramonium growing in Uzbekistan, the content of the considered elements is lower than amount of the element of D. stramonium growing in Kazakhstan and South Africa.