Spectrophotometric determination of trace amounts of yttrium in silicates after cation exchange separation with dl-2-hydroxybutyric acid

Mazzucotelli, A.; Frache, Roberto; Dadone, A.; Baffi, F.; Cescon, Paolo

doi:10.1016/s0003-2670(01)83580-7

Cited by 7 publications

(1 citation statement)

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“…The literature survey showed that yttrium analysis has been studied very sporadically using spectrophotometer only handful of methods were reported during the last 50 years, number of reagents has been introduced for spectrophotometeric determination of yttrium among them are 2-hydroxy-1-naphtaladehyde-P-8-benzoic hydrazone (HNHBH) (11) , 5,7 diiodoquioline-8-ol and rhodamine 6G, (12) bromopyrogallol red, (13) , arsenazo I, (14) arzenazo (III), (15) molybdoyttric acid and basic dyes, (16) 1amino-4-hydroxyanthra quinon (17) Quinalizarin green, (18) di-2-hydroxybutric acid, (19) chromotrope2R, (20) ammonium purpurate, (21) molbdophosphoric acid (22) . Xylenol orange used as indicator for determination of yttrium and rare earth elements by titration with EDTA (23) , total RRE can be determined by xylenol orange at 600-620 nm using cetylpyridinebromide as a surfactant (24) , spectrophotometric determination of yttrium-xylenol orange-EDTA complex can be extracted the complex into xylene and determined at λ max 604 nm by shaking the solution complex with xylene (25) .…”

Section: Introductionmentioning

confidence: 99%

Direct and Derivative Spectrophotometric Method for Yttrium Determination in Different Rare Earth Concentrates

Elrakaiby

2018

Al-Azhar Bulletin of Science

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A simple and accurate spectrophotometric method for the determination of Yttrium using xylenol orange as a chromogenic dye in different rare earth concentrates of Egyptian monazite and xenotime by using direct and derivative spectrophotometric methods was described in the present work. The calibration curve was linear from 0.2 -6 μg ml -1 at a maximum wavelength value of 568 nm. The various parameters and reaction conditions, which influence the formation of the complex, were investigated where the complex were stable for one hour. The molar absorptivity (є) and Sandell ' s sensitivity were found to be 3.4x10 4 L mol -1 cm -1 and 2.7x10 -3 respectively. The % RSD and percentage error were 1.64% and 1.5% respectively. A high sensitivity and accuracy for the determination of yttrium in the rare earths Elements (REE) concentrates was observed when the first derivative spectrophotometric method was applied.

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Section: Introductionmentioning

confidence: 99%