When preparing methacholine dilutions for the doubling protocol from 100 mg of dry powder,which of the following would yield a dilution of 4.0 mg/ml?
A) 3 ml of 16.0 mg/ml
B) 3 ml of 8.0 mg/ml
C) 3 ml of 4.0 mg/ml
D) 3 ml of 2.0 mg/ml

Question

Quizplus · Accepted Answer

To achieve a 4.0 mg/ml concentration, you can dilute a higher concentration solution. Starting with 8.0 mg/ml, diluting it by half (3 ml of 8.0 mg/ml mixed with 3 ml of diluent) will yield a 4.0 mg/ml solution.

When Preparing Methacholine Dilutions for the Doubling Protocol from 100