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What does the linear range of a determination mean?

  • A.The interval between the detection and quantitation limits
  • B.The concentrations over which absorbance is proportional
  • C.The range of wavelengths the lamp emits usefully
  • D.The span of flame heights that give a signal

Answer: B

The linear range runs from the lowest concentration distinguishable from noise to the point where stray light and line broadening bend the curve, and it is typically two orders of magnitude - narrower than in molecular photometry. Wavelength range, burner height and the two limits are separate specifications. A narrow linear range means dilution is needed more often, which is a real practical cost of the technique. The shared properties explain why these belong to one family, and the differences explain why more than one exists.

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