Abstract: According to the present invention, there is provided a method of determining a concentration of uranium including: a) a primary measuring step of measuring luminescence intensity or luminescence attenuation of uranium (VI) of an oxidant added sample obtained by adding an oxidant composition to a detection target sample; b) a secondary measuring step of adding different volumes of standard solution containing uranium (VI) having a predetermined concentration to a plurality of oxidant added samples, respectively, and then measuring luminescence intensity or luminescence attenuation of uranium (VI) contained in each standard solution added sample; and c) a calculating step of calculating a concentration of uranium (VI) contained in the detection target sample by a standard addition method based on the primary and secondary measurements. With the method for determining a concentration of uranium according to the present invention, the concentration of uranium may be further rapidly and accurately analyzed.

Abstract: Disclosed herein is a method of quantitatively analyzing uranium in an aqueous solution, the method comprising measuring Raman scattering intensity of water and luminescence intensity of uranium standard solutions having various concentrations (Operation 1); calculating a ratio of the uranium luminescence intensity to the Raman scattering intensity of water for each uranium concentration and plotting a calibration curve therethrough (Operation 2); and measuring Raman scattering intensity of water and uranium luminescence intensity of an unknown sample, calculating a ratio of the measured intensities and determining a uranium concentration thereof by using the calibration curve (Operation 3). When the quantitative analysis method of uranium in an aqueous solution according to the present invention is used, inconvenience of a typical analysis method, in which repetitive measurements of calibration curves are required according to various measurement conditions, may be removed.

Abstract: According to the present invention, there is provided a method of determining a concentration of uranium including: a) a primary measuring step of measuring luminescence intensity or luminescence attenuation of uranium (VI) of an oxidant added sample obtained by adding an oxidant composition to a detection target sample; b) a secondary measuring step of adding different volumes of standard solution containing uranium (VI) having a predetermined concentration to a plurality of oxidant added samples, respectively, and then measuring luminescence intensity or luminescence attenuation of uranium (VI) contained in each standard solution added sample; and c) a calculating step of calculating a concentration of uranium (VI) contained in the detection target sample by a standard addition method based on the primary and secondary measurements. With the method for determining a concentration of uranium according to the present invention, the concentration of uranium may be further rapidly and accurately analyzed.

Abstract: Disclosed herein is a method of quantitatively analyzing uranium in an aqueous solution, the method comprising measuring Raman scattering intensity of water and luminescence intensity of uranium standard solutions having various concentrations (Operation 1); calculating a ratio of the uranium luminescence intensity to the Raman scattering intensity of water for each uranium concentration and plotting a calibration curve therethrough (Operation 2); and measuring Raman scattering intensity of water and uranium luminescence intensity of an unknown sample, calculating a ratio of the measured intensities and determining a uranium concentration thereof by using the calibration curve (Operation 3). When the quantitative analysis method of uranium in an aqueous solution according to the present invention is used, inconvenience of a typical analysis method, in which repetitive measurements of calibration curves are required according to various measurement conditions, may be removed.

Abstract: The present invention relates to an apparatus and method for measuring the size of nanoparticles present in an aqueous solution as an infinitesimal quantity, and, more particularly, to a scheme that remotely measures the laser-induced breakdown of a fine nanoparticle using a probe beam in a non-contact manner, performs curve fitting on the symmetrical frequency distribution curve of the measured magnitude of a probe beam signal to form the shape of a Gaussian function, obtains calibration curves for the size of the nanoparticle from the peak and full-width at half-maximum thereof, and determines the size of an unknown nanoparticle from the calibration curves.