Research Article

A Highly Sensitive Multicommuted Flow Analysis Procedure for Photometric Determination of Molybdenum in Plant Materials without a Solvent Extraction Step

Figure 3

Effect of the potassium thiocyanate concentration. Curves a and b refer to blank and Mo (VI) standard solution (100 μgL−1). Experimental conditions: 0.44 mol L−1 SnCl2; blank and Mo (VI) standard solution in 1.5 mol L−1 HC medium; 7 sampling cycles; sampling time intervals of 2.0 and 1.0 s for insertion sample and SCN solution, respectively; pumping rate at 50 μLs−1.