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The streptomycin in 500 g of a broth was determined by addition of 134 mg of the pure antibiotic containing 14C The specific activity of this preparation was found to be 223 cpmmg for a 30 min

The streptomycin in 500 g of a broth was determined by addition of 1.34 mg of the pure antibiotic containing 14C. The specific activity of this preparation was found to be 223 cpm/mg for a 30-min count. From the mixture, 0.112 mg of purified streptomycin was isolated, which produced 654 counts in 60.0 min. Calculate the concentration in parts per million streptomycin in the sample.

Jun 22 2020 View more View Less

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