2.4. Procedure of L'vov platform modification
L'vov platforms were pretreated by injection of 20 μL of 0.05–1gL−1
standard solution of Ir, Nb, and 20 μL of 0.05–5gL−1 standard solution
of W onto the L'vov platform, and submitting it to a temperature
program based on a previous work [17]. This procedure was repeated a
few times resulting in an optimal mass of the modifier for which
maximum of the integrated absorbance signal of antimony was
obtained. Then the modified L'vov platforms were ready for direct
antimony measurements in soil and sediment samples.