Студенттер мен жас ғалымдардың «фараби әлемі» атты халықаралық ғылыми конференциясы
DETERMINATION OF ASCORBIC ACID BASED ON MOLYBDENIUM SENSOR
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Сборник конф Фараби Әлемі 2023 химфак-печать
| DETERMINATION OF ASCORBIC ACID BASED ON MOLYBDENIUM SENSOR
Mukhamedzhan A., Zhumasheva N. Scientific supervisor: professor Kamysbayev D.K. al-Farabi Kazakh National University akni-99@mail.ru Ascorbic acid (AA) also known as vitamin C, is a water-soluble organic compound that is essential for human health. It is a potent antioxidant, which means that it helps protect cells from oxidative stress caused by free radicals. Ascorbic acid is found naturally in many fruits and vegetables, including blackcurrant, citrus fruits, berries, kiwi, mango, papaya, broccoli, and peppers. It is involved in various biological processes, including collagen synthesis, wound healing, and immune function. Ascorbic acid deficiency can lead to scurvy, a disease characterized by fatigue, weakness, and connective tissue and bone damage. The main application of ascorbic acid is as a nutritional supplement to prevent or treat vitamin C deficiency, as a food additive and preservative to prevent oxidation and spoilage of food products, also used in cosmetics and skincare products due to its antioxidant properties and used as a reducing agent in various analytical techniques, such as spectrophotometry and chromatography. The determination of ascorbic acid is important for nutritional analysis, quality control, health monitoring, and research purposes. The aim of the study is a determination of the Ascorbic acid (AA) using electrochemical sensors based on molybdenum compounds, like MoOx. During the experiment, the voltammetry - "PGSTAT 101" Metrohm Autolab device is used. The study of the electrochemical properties of molybdenium electrodes in various electric sedimentation stadia and the determination of AA was carried out on the basis of method of cyclic voltammetry. The synthesis of molybdenium oxide (MoOx) from ammonium molybdate was carried out in several steps: ammonium molybdate was dissolved in double distilled water with continuous stirring. Concentrated HCl was added dropwise to solution until the pH was 1, this reaction mixture was stirred for 30min and then transferred to a Teflon lined autoclave. Hydrothermal were carried out at 180 0 C for 12 hours. The resulting product was washed with DI water and ethanol several times to remove any impurities and unreacted precursors. The product was allowed to dry in an oven at 80 0 C for 3hours. After being ground it was further characterized by SEM and XRD. Since the working molybdenium electrode is very sensitive, we used dry cleaning methods to clean it. Many substances are used as chemical cleaners, such as double distilled water, distilled water, filter paper, felt, aluminum oxide powder, sandpaper, etc. The glassy carbon electrode was converted by molybdenium oxide in different ways. One of the way is the glass was converted by precipitating molybdenium oxide. The electrochemical properties of the modified electrode will be studied. «Фараби Әлемі» атты студенттер мен жас ғалымдардың халықаралық конференциясы 290 жүктеу/скачать 2,6 Mb. Достарыңызбен бөлісу:
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