Determination of uranium in minerals by laser fluorimetry

Retracted article: Age-dependent radiation dose due to uranium in public drinking water in Hyderabad, India

“…The fluorescence peak of organic matter is around 400 nm and those of uranium in complexing media are 494, 516, 540 and 565 nm, with a maximum around 510 nm (Veselsky et al, 1988). Therefore, using an optical filter at 450 nm, the contribution of organic matter is nullified.…”

Flow‐injection in‐valve solid‐phase extraction spectrophotometric determination of uranium in geological samples

“…Most of the methods are spectrofluorometric [1]. A detection limit of 1 lg • g ‫1מ‬ could be achieved [2] but with low accuracy and interference occurring due to quenching [3]. So, preliminary separation of interfering ions is required.…”

Determination of uranium at ultra trace level in packaged drinking water by laser fluorimeter and consequent ingestion dose

“…This excites the uranyl complex in the aqueous medium (Williams et al, 1983, Billard et al, 2003. The excited uranium complex emits green lights (496-565 nm, 4 peaks) that are measured by a photomultiplier tube (PMT) (Veselsky et al, 1988). The organic matter present in natural water also fluoresces when excited by the nitrogen laser, but has very short life time (< 100 ns).…”