Only ______ percent of the effluent of the liquid chromatography must be introduced in the mass spectrometer.

Only ______ percent of the effluent of the liquid chromatography must

1.	Only ______ percent of the effluent of the liquid chromatography must be introduced in the mass spectrometer.
A.	1-2
B.	1-5
C.	1-20
D.	1-15
Answer» C. 1-20