Which of the following techniques would be most useful to identify as well as quantify the presence of a known impurity in a drug substance?
A. NMR
B. MS
C. IR
D. HPLC
Answer:D
Which of the following techniques would be most useful to identify as well as quantify the presence of a known impurity in a drug substance?
A. NMR B. MS C. IR D. HPLC