試題詳解

21. Why is source modulation needed in atomic absorption spectroscopy? (1) to create a double-beam configuration for the spectrometer, (2) to separate the emission signal of the analyte in the flame from the emission of the fuel and oxidant in the flame, (3) to create a AC type of signal for the flame emission, (4) to create a DC type of signal for the light source, (5) to create a AC type of signal for the light source. Your answer:
(A)1,2,4
(B)1,5
(C)1,4
(D)1,2,3
(E)5