All of the Following Are Background Correction Techniques for Atomic

All of the following are background correction techniques for atomic spectroscopy,except:

A) subtraction of adjacent pixel height from signal pixel height for a charge injection detector.
B) a rotating beam chopper periodically blocks the analyte signal,allowing for a background measurement.
C) the absorbance and scattering of the light from a D₂ lamp is measured and subtracted from the absorbance and scattering of light from a hollow-cathode tube.
D) the analyte sample is spiked with a compound to absorb all background signal.
E) a strong magnetic field is pulsed on and off.The sample and background is observed when field off.Only the background is observed when the field is on.The absorbance difference is the analyte signal.

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