26. The relative optical density of the solution of the sulfosalicylate iron complex (W) is equal to Aot.x = 0.290 (L = 5.0 cm) to calculate the concentration (mg / ml) of iron, if the reference solution contained 0.0576 mg Fe in 50.00 ml, and the molar extinction coefficient of the sulfosalicylate iron (III) complex is 3000.

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