A Toxicology Screen Is Set Up Using Thin Layer Chromatographic

question 5

Multiple Choice

A toxicology screen is set up using thin layer chromatographic plates.Four positive controls/standards are used with the following distance of migration from application point results: Std A = 8 cm; Std B = 15 cm; Std C = 22.The acetone solvent front moved 35 cm.After processing an unknown sample,a solute had a migration distance of 16 cm.What are the retention factors (R_f) of standards A,B,and C?

• A) 8,15,22
• B) 8,12,18
• C) 4.4,2.3,1.5
• D) 0.23,0.43,0.63

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Definitions:

American Authors

American authors are writers originating from or based in the United States, contributing to various genres and styles in literature.

Hawthorne

Refers to Nathaniel Hawthorne, an American novelist and short story writer known for his novels "The Scarlet Letter" and "The House of the Seven Gables."

Melville

Herman Melville was an American novelist, short story writer, and poet best known for his novel "Moby Dick," which explores complex themes including humanity's struggle against nature.

Moby Dick

A novel by Herman Melville, considered an American classic, which narrates the obsessive quest of Ahab, captain of the whaling ship Pequod, for revenge on Moby Dick, a giant white sperm whale.