Fish-liver oil is a good source of vitamin A, which is measured spectrophotometrically
Chapter 7, Problem 7.93(choose chapter or problem)
Fish-liver oil is a good source of vitamin A, which is measured spectrophotometrically, after correcting for background, at a wavelength of 329 nm. (a) Suggest a reason for using this wavelength. (b) In what region of the spectrum does this wavelength lie? (c) When 0.1232 g of fish-liver oil is dissolved in 500. mL of solvent, the absorbance is 0.724 units. When 1.67_10_3 g of vitamin Ais dissolved in 250. mL of solvent, the absorbance is 1.018 units. Calculate the vitamin A concentration in the fish-liver oil.
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