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Fluorescence, absorption, and excitation spectra of polycyclic aromatic hydrocarbons as a tool for quantitative analysis a m rivera-figueroa , k a ramazan , and b j finlayson-pitts department of chemistry, university of california, irvine, ca 92697-2025. Quantitative measurements are those which involve the collection of numbers it is the opposite of qualitative data which are observations for example, if you were interested in looking at height. Unit 1: chemistry fundamentals a quantitative observation that involves both a number and a unit (§ 12) the degree of agreement among several measurements.
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