METHOD TO DETERMINE PARTIAL CONCENTRATIONS OF PHYSICAL-CHEMICAL FORMS OF URANIUM (VI)

摘要

FIELD: measurement equipment.SUBSTANCE: invention relates to the field of monitoring of natural and process waters and is designed to determine partial concentrations of physical-chemical forms of uranium (VI) in aqueous solutions, which is necessary, in particular, for optimisation of the process of uranium extraction by method of underground leaching. The method consists in radiation of the volume of the investigated sample with nanosecond pulses of laser radiation in ultraviolet range and subsequent registration of dependence of intensity of a signal of mixture fluorescence on intensity of laser radiation and time of delay of receiver strobe relative to the laser pulse. The source of the laser radiation may be a AIG:Nd laser with conversion of the radiation frequency into the fourth harmonics (wave length 266 nm) with maximum energy in the pulse of at least 1 mJ. The system for registration of the fluorescence signal may be a CCD-chamber strobed by nanosecond pulses and connected to a spectral device (polychromator).EFFECT: invention provides for increased accuracy of detection.5 cl, 6 dwg