How do you find the concentration of Fe3+ ions in a 6.00 ml 10 µg/ml Fe3+ standard solution after?

1ml of 10%Hydroxylamine hydrochloride solution，2ml of 0.15% Phenanthroline solution, 5ml of 1mol/L Sodium acetate and 36 ml of distilled water are all added to an Fe3+ standard solution of concentration 10 µg/mL and volume 6 ml. What is the new concentration of the Fe3+?