0731. Solving a chemistry problem

0731. Solving a chemistry problem

52. When analyzing air for the content of polyaromatic compounds, 1000 liters of air were passed through 1 liter of absorbent (82% absorption rate), which, in turn, was passed through an adsorbent cartridge (94% recovery rate), and then desorbed from the surface adsorbent 10 ml of pentane. To the resulting solution, 1 ml of a standard solution of naphthalene (standard substance) with a concentration of 10 mg/l was added. The chromatogram revealed peaks of 1,4-dihydronaphthalene, indole, acenaphthene, phenanthrene, anthracene, naphthalene, fluoranthene and benzophenanthrene with areas of 13,18,54,162,178,74,102 and 42 units. Determine the concentration of polyaromatic compounds in the air if f1 for the detected compounds is 1.01 1.17 1.28 1.34 1.32 1.0 1.46 and 1.58, respectively.

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