試題詳解

複選題
7. Which of the following statements about mass spectrometry is (are) correct? (AB) Mass spectrometry measures the charge-to-mass ratio of charged particles. (AC) The main steps a mass spectrometer takes inelude vaporization, ionization, accelcration, scparation, and detection. (AD) The mass spectra of a given substance obtained from mass spectrometers using different ionization sources are the same. (AE) ICP-MS can analyze metals only. (BC) For0.I mL of sample, the ICP-MS absolute detection limit is equal or less than 0.1 yg. (BD) Among different ion sources for molecular mass spectrometry, electron ionization results in higher sensitivities than do chemical and field jonization.