6 research outputs found
Determination of traces of chloride in the inorganic functional materials
ΠΠ°ΠΉΠ΄Π΅Π½Ρ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΡΠ΅ ΡΡΠ»ΠΎΠ²ΠΈΡ ΡΠ°ΡΡΠ²ΠΎΡΠ΅Π½ΠΈΡ ΠΌΠΎΠ½ΠΎΠΊΡΠΈΡΡΠ°Π»Π»ΠΎΠ² Π³Π΅ΡΠΌΠ°Π½Π°ΡΠ° Π²ΠΈΡΠΌΡΡΠ°, Π° ΡΠ°ΠΊΠΆΠ΅ ΠΎΠΊΡΠΈΠ΄Π° ΠΈ ΠΉΠΎΠ΄ΠΈΠ΄Π° ΡΠ°Π»Π»ΠΈΡ, ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΡΡΠΈΡ
ΡΡ Π΄Π»Ρ Π²ΡΡΠ°ΡΠΈΠ²Π°Π½ΠΈΡ ΠΌΠΎΠ½ΠΎΠΊΡΠΈΡΡΠ°Π»Π»ΠΎΠ². ΠΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½ΠΎ Π³Π΅ΡΠΌΠ°Π½Π°Ρ Π²ΠΈΡΠΌΡΡΠ° ΡΠ°ΡΡΠ²ΠΎΡΡΡΡ Π² Π±ΠΎΡΠ°ΡΠ½ΠΎΠΌ Π±ΡΡΠ΅ΡΠ΅, Π° ΠΎΠΊΡΠΈΠ΄ Π²ΠΈΡΠΌΡΡΠ° Π² ΡΠΌΠ΅ΡΠΈ Π°Π·ΠΎΡΠ½ΠΎΠΉ ΠΈ Π»ΠΈΠΌΠΎΠ½Π½ΠΎΠΉ ΠΊΠΈΡΠ»ΠΎΡ, Π² ΠΎΠ±ΠΎΠΈΡ
ΡΠ»ΡΡΠ°ΡΡ
Π²ΡΠ΄Π΅ΡΠΆΠΈΠ²Π°Ρ 2 > pΠ > 1. ΠΠΎΠ΄ΠΈΠ΄ ΡΠ°Π»Π»ΠΈΡ ΡΠ°ΡΡΠ²ΠΎΡΡΡΡ Π² ΡΠ°Π·Π±Π°Π²Π»Π΅Π½Π½ΠΎΠΉ HNOβ, ΠΎΠ±ΡΠ°Π·ΡΡΡΠΈΠΉΡΡ ΠΉΠΎΠ΄ ΡΠ΄Π°Π»ΡΡΡ ΠΎΡΠ³ΠΎΠ½ΠΊΠΎΠΉ. Π Π°Π·ΡΠ°Π±ΠΎΡΠ°Π½Ρ ΡΠΎΡΠΎΡΡΡΠ±ΠΈΠ΄ΠΈΠΌΠ΅ΡΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΌΠ΅ΡΠΎΠ΄ΠΈΠΊΠΈ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ Ρ
Π»ΠΎΡΠΈΠ΄-ΠΈΠΎΠ½ΠΎΠ² Π΄ΠΎ 5β
10β»β΄ ΠΌΠ°Ρ. % Π² ΠΌΠΎΠ½ΠΎΠΊΡΠΈΡΡΠ°Π»Π»Π΅ Π³Π΅ΡΠΌΠ°Π½Π°ΡΠ° Π²ΠΈΡΠΌΡΡΠ°, Π° ΡΠ°ΠΊΠΆΠ΅ Π΄ΠΎ 1β
10β»Β³ ΠΌΠ°Ρ. % ΠΈ Π΄ΠΎ 5β
10β»β΄ ΠΌΠ°Ρ. % Π² ΠΏΠΎΡΠΎΡΠΊΠ°Ρ
ΠΎΠΊΡΠΈΠ΄Π° Π²ΠΈΡΠΌΡΡΠ° ΠΈ ΠΉΠΎΠ΄ΠΈΠ΄Π° ΡΠ°Π»Π»ΠΈΡ, ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²Π΅Π½Π½ΠΎ. ΠΠ΅ΡΠΎΠ΄ΠΈΠΊΠΈ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΠ·ΡΡΡΡΡ ΡΠ΄ΠΎΠ²Π»Π΅ΡΠ²ΠΎΡΠΈΡΠ΅Π»ΡΠ½ΡΠΌΠΈ ΠΌΠ΅ΡΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠ°ΠΌΠΈ.The optimum conditions for dissolving single crystals of bismuth germanate, as well as of bismuth oxide and thallium iodide have being used for the crystal growth are found. It is proposed to dissolve the bismuth germanate in the borate buffer solution and the bismuth oxide in the mixture of nitric and citric acid under 2 > pΠ >1. Thallium iodide one can dissolve in the diluted nitric acid, and then the resulting iodine is removing by means of distillation. There were developed phototurbidimetric techniques for the determination of chlorides in the single crystals of bismuth germanate (up to 5β
10β»β΄ wt %), as well as in the powders of bismuth oxide (up to 1β
10β»Β³ wt %) and thallium iodide (up to 5β
10β»β΄ wt %). These techniques are characterized by satisfactory metrological parameters
Simple Instrumental and Visual Tests for Nonlaboratory Environmental Control
Proposed are simple and available techniques that can be used for rapid and reliable environmental control specifically of natural water by means of instrumental and visual tests in outdoor conditions. Developed are the chemical colorimetric modes for fast detection of socially dangerous trace impurities in water such as Co(II), Pd(II), and Rh(III) as well as NO2--ions and Fe(III) serving as model impurities. Application of portable digital devices and scanner allows estimating the color coordinates and increasing the accuracy and sensitivity of the tests. The combination of complex formation with preconcentration of colored complexes replaces the sensitive but time-consuming and capricious kinetic method that is usually used for this purpose at the more convenient and reliable colorimetric method. As the test tools, the following ones are worked out: polyurethane foam tablets with sorbed colored complexes, the two-layer paper sandwich packaged in slide adapter and saturated by reagents, and polyethylene terephthalate blister with dried reagents. Fast analysis of polyurethane foam tablets is realized using a pocket digital RGB-colorimeter or portable photometer. Express analysis of two-layer paper sandwich or polyethylene terephthalate blister is realized by visual and instrumental tests. The metrological characteristics of the developed visual and instrumental express analysis techniques are estimated
Spectrophotometric determination of moisture content in ethylene glycol using solvatechromium properties of chloranilic acid
Π Π°Π·ΡΠ°Π±ΠΎΡΠ°Π½Π° ΠΏΡΠΎΡΡΠ°Ρ, ΡΠΎΡΠ½Π°Ρ ΠΈ Π±Π΅Π·ΠΎΠΏΠ°ΡΠ½Π°Ρ ΠΌΠ΅ΡΠΎΠ΄ΠΈΠΊΠ° ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ Π²Π»Π°ΠΆΠ½ΠΎΡΡΠΈ ΡΡΠΈΠ»Π΅Π½Π³Π»ΠΈΠΊΠΎΠ»Ρ, ΠΎΡΠ½ΠΎΠ²Π°Π½Π½Π°Ρ Π½Π° ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½ΠΈΠΈ ΡΠΏΠ΅ΠΊΡΡΠ°Π»ΡΠ½ΡΡ
Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ Π΅Π³ΠΎ ΡΠ°ΡΡΠ²ΠΎΡΠΎΠ² Ρ Ρ
Π»ΠΎΡΠ°Π½ΠΈΠ»ΠΎΠ²ΠΎΠΉ ΠΊΠΈΡΠ»ΠΎΡΠΎΠΉ. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ Π°Π½Π°Π»ΠΈΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠΈΠ³Π½Π°Π»Π° Π²Π΅Π»ΠΈΡΠΈΠ½Ρ ΡΠ²Π΅ΡΠΎΠΏΠΎΠ³Π»ΠΎΡΠ΅Π½ΠΈΡ ΠΏΡΠΈ ΡΠΈΠΊΡΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠΉ Π΄Π»ΠΈΠ½Π΅ Π²ΠΎΠ»Π½Ρ (540 Π½ΠΌ) ΠΏΠΎΠ·Π²ΠΎΠ»ΡΠ΅Ρ Ρ Π΄ΠΎΡΡΠ°ΡΠΎΡΠ½ΠΎΠΉ ΡΠΎΡΠ½ΠΎΡΡΡΡ ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΡΡ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠ΅ Π²Π»Π°ΠΆΠ½ΠΎΡΡΠΈ ΡΡΠΈΠ»Π΅Π½Π³Π»ΠΈΠΊΠΎΠ»Ρ Π² ΠΈΠ½ΡΠ΅ΡΠ²Π°Π»Π΅ 1.31-133 ΠΌΠ³/ΠΌΠ». ΠΡΠΈ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠΈ Π² ΡΡΠΈΠ»Π΅Π½Π³Π»ΠΈΠΊΠΎΠ»Π΅ ΠΌΠ°Π»ΡΡ
ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΉ Π²ΠΎΠ΄Ρ (1.31-20 ΠΌΠ³/ΠΌΠ») Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ Π°Π½Π°Π»ΠΈΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠΈΠ³Π½Π°Π»Π° ΡΠ΅Π»Π΅ΡΠΎΠΎΠ±ΡΠ°Π·Π½ΠΎ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°ΡΡ ΠΏΠΎΠ»ΠΎΠΆΠ΅Π½ΠΈΠ΅ ΠΌΠ°ΠΊΡΠΈΠΌΡΠΌΠ° ΡΠ²Π΅ΡΠΎΠΏΠΎΠ³Π»ΠΎΡΠ΅Π½ΠΈΡ, ΡΡΠΎ Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½ΠΎ ΡΠ²Π΅Π»ΠΈΡΠΈΠ²Π°Π΅Ρ ΡΠΎΡΠ½ΠΎΡΡΡ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ Π²ΠΎΠ΄Ρ. Π‘ΠΈΡΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΏΠΎΠ³ΡΠ΅ΡΠ½ΠΎΡΡΠΈ ΠΌΠ΅ΡΠΎΠ΄ΠΈΠΊΠΈ Π½Π΅Π·Π½Π°ΡΠΈΠΌΡ.Developed is a simple, precise and safe procedure of the determination of the content of moisture in ethylene glycol, based on the measurement of the spectral characteristics of its solutions with chloranilic acid. It is shown that the use of the value of light absorption at 540 nm wavelength as an analytical signal makes it possible to determine the content of moisture in ethylene glycol within 1.31 - 133 mg/ml interval to a sufficient accuracy. The analytical signal to be chosen for the determination of low concentrations of water (1.31-20 mg/ml) in ethylene glycol is the position of the light absorption maximum which considerably increases the accuracy of the determination of water. Systematic errors of the procedure are insignificant
ΠΠΏΡΠΈΡΠ½ΠΎ ΠΏΡΠΎΠ·ΠΎΡΡ ΠΌΠ΅Π»Π°ΠΌΡΠ½ΠΎ-ΡΠΎΡΠΌΠ°Π»ΡΠ΄Π΅Π³ΡΠ΄Π½Ρ ΠΏΠΎΠ»ΡΠΌΠ΅ΡΠΈ, ΡΠΎ ΠΌΠΎΠ΄ΠΈΡΡΠΊΠΎΠ²Π°Π½Ρ ΠΏΡΠΎΡΠΎΠ½ΠΎΠ°ΠΊΡΠ΅ΠΏΡΠΎΡΠ½ΠΈΠΌΠΈ ΡΠΏΠΎΠ»ΡΠΊΠ°ΠΌΠΈ
Investigation of reaction water binding in melamine-formaldehyde polymers with proton accepting compounds has shown that the use of dymethil sulfoxide in 1/1 (v/v) ratio provides preparation of optically transparent materials. Introduction of dymethil formamide and dymethil sulfoxide improves the main characteristics of the material, but modification with dymethil formamide reduces the polymer transparency.ΠΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½Π½Ρ ΠΏΡΠΎΡΠ΅ΡΡΠ² Π·Π²'ΡΠ·ΡΠ²Π°Π½Π½Ρ ΡΠ΅Π°ΠΊΡΡΠΉΠ½ΠΎΡ Π²ΠΎΠ΄ΠΈ Ρ ΠΌΠ΅Π»Π°ΠΌΡΠ½ΠΎ-ΡΠΎΡΠΌΠ°Π»ΡΠ΄Π΅Π³ΡΠ΄Π½ΠΈΡ
ΠΏΠΎΠ»ΡΠΌΠ΅ΡΠ°Ρ
Π·Π° Π΄ΠΎΠΏΠΎΠΌΠΎΠ³ΠΎΡ ΠΏΡΠΎΡΠΎΠ½ΠΎΠ°ΠΊΡΠ΅ΠΏΡΠΎΡΠ½ΠΈΡ
ΡΠΏΠΎΠ»ΡΠΊ ΠΏΠΎΠΊΠ°Π·Π°Π»ΠΎ, ΡΠΎ ΠΏΡΠΈ Π·Π°ΡΡΠΎΡΡΠ²Π°Π½Π½Ρ Π΄ΠΈΠΌΠ΅ΡΠΈΠ»ΡΡΠ»ΡΡΠΎΠΊΡΠΈΠ΄Ρ Π² ΠΎΠ±'ΡΠΌΠ½ΠΎΠΌΡ ΡΠΏΡΠ²Π²ΡΠ΄Π½ΠΎΡΠ΅Π½Π½Ρ 1:1 ΠΌΠΎΠΆΠ½Π° ΠΎΠ΄Π΅ΡΠΆΠ°ΡΠΈ ΠΎΠΏΡΠΈΡΠ½ΠΎ ΠΏΡΠΎΠ·ΠΎΡΡ ΠΌΠ°ΡΠ΅ΡΡΠ°Π»ΠΈ. ΠΠ²Π΅Π΄Π΅Π½Π½Ρ Π΄ΠΈΠΌΠ΅ΡΠΈΠ»ΡΠΎΡΠΌΠ°ΠΌΡΠ΄Ρ ΡΠ° Π΄ΠΈΠΌΠ΅ΡΠΈΠ»ΡΡΠ»ΡΡΠΎΠΊΡΠΈΠ΄Ρ ΠΏΠΎΠΊΡΠ°ΡΡΡ ΠΎΡΠ½ΠΎΠ²Π½Ρ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ ΠΌΠ°ΡΠ΅ΡΡΠ°Π»Ρ, ΠΎΠ΄Π½Π°ΠΊ ΠΌΠΎΠ΄ΠΈΡΡΠΊΠ°ΡΡΡ Π΄ΠΈΠΌΠ΅ΡΠΈΠ»ΡΠΎΡΠΌΠ°ΠΌΡΠ΄ΠΎΠΌ Π·Π½ΠΈΠΆΡΡ ΠΏΡΠΎΠ·ΠΎΡΡΡΡΡ ΠΏΠΎΠ»ΡΠΌΠ΅ΡΡΠ²