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  • atomic absorption spectrophotometer An instrument used to analyze the sharp resonance line of a sample that, in a flame, emits an atomic vapor. It consists essentially of a light source, a combustion system, a monochromator, a photomultiplier and an electronic readout system.  
  • absorption spectrophotometer Measures the absorption or sample transmittance over a range of specified wavelengths. Sample may be placed within the device and the transmission measured to an accuracy of given percent. The parameter slit width may be varied.
  • spectrophotometer An instrument for measuring spectral transmittance or reflectance.
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