Optical characteristics of nitrate and nitrite salts and their aqueous solutions are studied to demonstrate the application of direct spectrophotometric methods for determination of different forms of nitrogen salts in water. Examples of application of the method for determination of nitrate ion in samples of natural and drinking water from wells are given.

The effect of the initial temperature of the sample on the efficiency of laser initiation and on the duration of the preexplosion stage (induction period) of PETN is studied. An analysis of the...

The possibility of determining phenol in water by direct optical methods without the use of wet chemistry and concentration methods is considered. The bounds for determining the concentration of phenol in water from the absorption and luminescence spectra are estimated. As a reason limiting the use of the direct luminescent method for determining phenol, the influence of Raman effect of the solvent is considered, which becomes comparable with the luminescent signal even at phenol concentrations in water at a level of 10 μg/L, despite the fact that the sensitivity of the method is sufficient to determine concentrations that are 50 times less.

A comparative study of the efficiency of the laser initiation of PETN by the first and second harmonics (1060 and 530 nm) of a neodymium-doped phosphate glass laser was performed. A significant...

The study demonstrates use of TLD-K thermoluminescent detectors of ionizing radiation, which are made of a glass-based amorphous material, to measure high-density and high-intensity radiation, i.e., to doses of up to 1 kGy in the operating dosimetric peak at dose rates of up to 10¹¹ Gy/s.