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- W2220381307 abstract "The results of an investigation on the use of 4-(2pyridylazo)-resorcinol (PAR) as a colorimetric reagent in the spectrophotometric determination of rare earth elements are reported. The optical densities of the rare earth-PAR complexes change with acidity of the medium. PAR is most sensitive toward yttrium and least sensitive toward lanthanum among the rare earths studied. (C.E.S.)" @default.
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- W2220381307 date "1964-03-01" @default.
- W2220381307 modified "2023-09-27" @default.
- W2220381307 title "THE SPECTROPHOTOMETRIC DETERMINATION OF RARE EARTH ELEMENTS BY MEANS OF 4- (2-PYRIDYLAZO)-RESORCINOL" @default.
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