複選題4. Which of the following statements about spectrophotometer is (are) correct?
(AB) In a single-beam spectrophotometer, the solvent and solution are irradiated simultaneously or nearly so.
(AC) A double-beam spectrophotometer employs a fixed beam of radiation that irradiates the solvent and the analyte solution sequentially.
(AD) The single-beam spectrophotometer can be adapted to automatic spectral recording easier than the double-beam spectrophotometer.
(AE) Problems arising from fluctuations in the source intensity due to drift in electronic circuits are less in double-beam spectrophotometers than single-beam spectrophotometers.
(BC) Diode-array spectrophotometers can detect the entire spectral range essentially simultaneously and can produce a spectrum in less than a second.
(BD) The resolution of diode-array spectrophotometers is usually higher than that of conventional spectrophotometers.
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