Why is the “standard additions†a better method compared to the
external calibration method?
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Chemistry
Why is the “standard additions†a better method compared to theexternal calibration method?
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The method is usually presented as the separate addition of several different equallyspaced amounts of analyte to separate aliquots of test solution Measurement is followed by extrapolation of the calibration line to zero responseThe use of several spiking concentrations is justified in the standard paradigm by the idea that it helps to check that the calibration is truly linear However this rationale is not compelling in a routine
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