190. Determination of aluminum is carried out by the intensity of fluorescence of its compound with manganon. To prepare a standard solution, 0.50 ml of an aluminum salt solution containing 1.0 μg/ml of aluminum(III) was measured, 0.30 ml of a manganon solution and 4.20 ml of water were added. The reading of the fluorimeter is 80. To 2.00 ml of the analyzed solution, 0.30 ml of the manganon solution and 2.70 ml of water were added. The fluorometer showed a value of 48. Determine the mass of aluminum ions in 100 ml of the test solution.

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