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 dochemical and field jonization.