42 research outputs found
Токсикологічна хімія харчових добавок та косметичних засобів
Методичні рекомендації містять пояснювальну записку, навчальну програму курсу, лабораторні роботи, питання для підготовки до модульного контролю, список використаної та рекомендованої літератури.
Рекомендовано студентам хімічного факультету за напрямом підготовки “хімічна технологія
Хімія поверхнево-активних речовин в харчовій та косметичній промисловості: методичні рекомендації до лабораторних робіт для студентів хімічного факультету
Методичні рекомендації містять пояснювальну записку, навчальну програму курсу, лабораторні роботи, контрольні запитання, список використаної та рекомендованої літератури. Рекомендовано студентам хімічного факультету за напрямом підготовки 6.051301 “хімічна технологія”. Призначення методичних вказівок полягає в тому, щоб не лише дати уявлення студентам про будову, класифікацію, властивості поверхнево-активних речовин (ПАР), використання ПАР в різних галузях промисловості, але й ознайомити з експериментальними методами їх дослідження
Хімічна метрологія, стандартизація та сертифікація: методичні рекомендації до лабораторних робіт
Методичні рекомендації містять пояснювальну записку, навчальну програму курсу, лабораторні роботи, задачі, довідкові дані, список цитованої літератури. Рекомендовано студентам хімічного факультету.Методичні рекомендації до лабораторних робіт
для студентів хімічного факультету
за напрямом підготовки 6.0501301 “хімічна технологія
Основи матеріалознавства:
Методичні рекомендації містять пояснювальну записку, навчальну програму курсу, лабораторні роботи, контрольні запитання для перевірки знань. Рекомендовано студентам хімічного факультету спеціальностей 161 «Хімічні технології та інженерія» та 102 “Хімія”
The Theoretical Description for the Perylaldehyde Aldoxyme Anodic Electrochemical Determination, Assisted by the Novel Squaraine Dye Composite with Copper(ii) Sulfide Nanoparticles
In this work the perillaldehyde aldoxime electrochemical determination on an anode, modified by squaraine dye composite with copper sulfide nanoparticles is analyzed. The electroanalytical process involves the formation of trivalent copper species, capable to oxidize the analyte by two parallel mechanisms. The correspondent mathematical model, correspondent to both of them, has been developed and analyzed by means of linear stability theory and bifurcation analysis. The model analysis clearly shows that the composite of a squaraine dye in organic phase and bivalent copper sulfide in the inorganic phase may be an efficient electrode modifier for perillaldehyde aldoxime electrochemical determination on an anode. The electroanalytical process will be mostly kinetically-controlled with the possibility of the transfer to diffusion-controlled mode. On the other hand, both oscillatory and monotonic instabilities may be realized in the electroanalytical process, and their probability will depend on the direction of the electroanalytical scenario in the concrete conditions, due to the possibility of the formation of ionic compounds in the pre-surface layer.
DOI: http://dx.doi.org/10.17807/orbital.v13i5.150
The Theoretical Description for Magnesium Chlorate Electrochemical Determination on a Magnezone-XC Modified Electrode
An interesting electroanalytical process for magnesium chlorate electrochemical determination has been described theoretically. The process involves the complex formation of magnesium cation with the azo dye Magnezone XC and the electropolymerization of the resulting complex compound in the presence of the chlorate-ion by two parallel mechanisms. The correspondent mathematical model has been developed and analyzed by means of linear stability theory and bifurcation analysis. It has been shown that from both electroanalytical and electrosynthetical points of view the system is efficient. The linear dependence between the electrochemical parameter and salt concentration is obtained easily, and the material formed during the electroanalytical process is highly conductive and catalytic. On the other hand, the oscillatory behavior in this system will be caused by double electric layer influences on both complexation and electropolymerization stages.
DOI: http://dx.doi.org/10.17807/orbital.v12i4.153
THE THEORETICAL DESCRIPTION FOR ECOPIPAM ELECTROCHEMICAL DETERMINATION ON A COBALT(III) OXYHYDROXIDE-BASED MATERIAL
The theoretical description for ecopipam electrochemical determination, assisted by cobalt(III) oxyhydroxide has been given. The correspondent mathematical model has been developed and analyzed by means of linear stability theory and bifurcation analysis. It has been shown that, despite of the electrochemical instabilities, more probable to occur than for the similar systems, the cobalt (III) oxyhydroxide is an efficient electrode modifier for ecopipam determination. The electroanalytical process is diffusion-controlled
The Theoretical Description for the Perylaldehyde Aldoxyme Anodic Electrochemical Determination, Assisted by the Novel Squaraine Dye Composite with Copper(ii) Sulfide Nanoparticles
In this work the perillaldehyde aldoxime electrochemical determination on an anode, modified by squaraine dye composite with copper sulfide nanoparticles is analyzed. The electroanalytical process involves the formation of trivalent copper species, capable to oxidize the analyte by two parallel mechanisms. The correspondent mathematical model, correspondent to both of them, has been developed and analyzed by means of linear stability theory and bifurcation analysis. The model analysis clearly shows that the composite of a squaraine dye in organic phase and bivalent copper sulfide in the inorganic phase may be an efficient electrode modifier for perillaldehyde aldoxime electrochemical determination on an anode. The electroanalytical process will be mostly kinetically-controlled with the possibility of the transfer to diffusion-controlled mode. On the other hand, both oscillatory and monotonic instabilities may be realized in the electroanalytical process, and their probability will depend on the direction of the electroanalytical scenario in the concrete conditions, due to the possibility of the formation of ionic compounds in the pre-surface layer.
DOI: http://dx.doi.org/10.17807/orbital.v13i5.150
The Theoretical Description for the Perylaldehyde Aldoxime Electrochemical Determination, Assisted by the Novel Squaraine Dye – VO(OH) - Composite
For the first time, the perillaldehyde aldoxime electrochemical determination has been evaluated from the theoretical point of view. The correspondent mathematical model, including different scenarios of the electroanalytical process, has been developed and analyzed by means of linear stability theory and bifurcation analysis. The model analysis clearly shows that the composite of a squaraine dye in organic phase and vanadium oxyhydroxide in the inorganic phase may be an efficient electrode modifier for perillaldehyde aldoxime electrochemical determination. On the other hand, both oscillatory and monotonic instabilities may be realized in the electroanalytical process, and their probability will strongly depend on the direction of the electroanalytical scenario in the concrete conditions.
DOI: http://dx.doi.org/10.17807/orbital.v12i3.149
The Theoretical Description for Ag2O2/Squaraine Dye – Metformin Electrochemical Determination
In this work, the electrochemical description for metformin electrochemical determination, assisted by Ag2O2 composite with squaraine dye, is evaluated from the theoretical point of view. Metformin oxidation is realized via assisted electrochemical 1,2,4-triazole formation, followed by its polymerization and N-oxidation. The correspondent mathematical model has been developed and analyzed by means of linear stability theory and bifurcation analysis. It has shown that the neutral and basic media are more efficient for metformin electrochemical determination than acidic media, due to the absence of the influences of non-protonated aminogroupsand, furtherly, pyridinic nitrogen atoms to double electric layer (DEL) ionic force, conductivity and impedance. In these conditions, the electrochemical instabilities are less capable to realize and, therefore, the linear dependence between the analyte concentration and the current of the system will be easier to obtain and maintain, as no side reaction or additional process, capable to compromise the monomer and (or) modifier stability is realized.
DOI: http://dx.doi.org/10.17807/orbital.v12i4.153