isotope-dilution analysis

isotope-dilution analysis

[′ī·sə‚tōp də¦lü·shən ə‚nal·ə·səs]
(analytical chemistry)
Variation on paper-chromatography analysis; a labeled radioisotope of the same type as the one being quantitated is added to the solution, then quantitatively analyzed afterward via radioactivity measurement.
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Therefore, isotope-dilution analysis provides a definitive technique and absolute quantification with excellent precision and accuracy compared with other analytical methods.