✦ LIBER ✦
Spectrophotometric determination of total rare earths in minerals with the chromogenic reagent p-acetylchlorophosphonazo
✍ Scribed by Jiao-Mai Pai; Ru Yang; Chung-Gin Hsu
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 371 KB
- Volume
- 257
- Category
- Article
- ISSN
- 0003-2670
No coin nor oath required. For personal study only.
✦ Synopsis
The syntheses and punficatlon of p-acetylchlorophosphonazo (CPApA) are descrrbed A method IS proposed for the spectrophotometrx determmatlon of total rare earths with CPApA m 0 2 M hydrochlonc acid medmm at theu lsosbestic point (667 nm) At this wavelength, the absorbances of equal amounts of rare earths are very close to each other Beer's law IS obeyed for O-12 pg of rare earths m 25 ml of solution The method has been satlsfactordy apphed to the determmation of total rare earths m mmerals ulth a prior organic extraction