When analyzing biological samples by LC-MS, one of the following methods that cannot eliminate the matrix effect is ()
A: Change the ionization method
B: Increase the injection volume
C: Optimize sample preparation methods
D: Adjust the mobile phase composition
A: Change the ionization method
B: Increase the injection volume
C: Optimize sample preparation methods
D: Adjust the mobile phase composition
举一反三
- Canon is one of the main texture composition methods
- All chromatographic methods have in common the use of a stationary phase and a mobile phase.
- Which of the following sampling methods is a probability sample?
- When<br/>IR is used in the Chinese Pharmacopoeia to identify drugs, samples<br/>are usually prepared by a number of methods. The following does not<br/>belong to the sample preparation method?() A: Tablet<br/>compression method B: paste<br/>method C: membrane D: solution<br/>method E: plasma method.
- Which of the following methods can eliminate system errors? A: Calibrate measuring instruments. B: Improve measurement methods. C: Change the test temperature. D: Run a controlled experiment.