Tag Archives: uncertainty

Methods for Improving Precision in Absorbance Measurements

As shown here, the relative uncertainty in determining absorbance (and thus in determining concentration) is greater at very high and very low absorbances (that is, when very little or almost all of the source radiation reaches the detector. One way … Continue reading

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Uncertainty in Measurement of Absorbance

In absorption spectroscopy, precision is limited by indeterminate errors—primarily instrumental noise—introduced when measuring absorbance. Precision is generally worse for low absorbances where P0≈ PT, and for high absorbances when PT approaches 0. We might expect, therefore, that precision will vary … Continue reading

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