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Svetlana Simova (Bulgarian NMR Centre, Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences)24/09/2026, 16:45Analytical and environmental chemistryE-poster
This study investigates whether the chemical composition of European oak honeydew honeys reflects the geographical origin. Sixty samples from Bulgaria, Germany, Greece, Italy, North Macedonia, Romania, Serbia, and Spain were analyzed using semiquantitative 13C nuclear magnetic resonance (NMR) spectroscopy. The protected designation of origin (PDO) Strandzha honey was compared to honey from...
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Mrs Slavica Sunariฤ24/09/2026, 16:50Analytical and environmental chemistryE-poster
Long valued for its distinct taste, almond beverage has recently emerged as one of the leading plant-based milk alternatives. Vegans and people with lactose intolerance use almond milk as a healthy substitute for dairy products. Almond milk offers fewer calories than cow milk, mainly because it has less protein and fewer carbohydrates when unsweetened. Almond milk is produced by blending water...
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Hristina Trisheska24/09/2026, 16:55Analytical and environmental chemistryE-poster
Wine aroma is one of the most important characteristics of wine quality and is determined by a complex mixture of volatile compounds. In this work, volatile aromatic compounds in Macedonian white wines were investigated using gas chromatography coupled with mass spectrometry (GC-MS) and two capillary columns with different stationary-phase polarities (HP5-MS with 5 % phenyl, and DB-1701 with...
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Merva Ejupi (Institute of chemistry, Faculty of Natural Sciences and Mathematics, Ss. Cyril and Methodius University in Skopje, Macedonia)24/09/2026, 17:00Analytical and environmental chemistryE-poster
Polyphenolic compounds derived from medicinal plants have attracted considerable attention due to their antioxidant, antimicrobial, and pharmacological properties. In recent years, deep eutectic solvents (DESs) have emerged as environmentally friendly alternatives to conventional organic solvents for the extraction of bioactive compounds, supporting the principles of green chemistry.
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The... -
Anastasija Hadzismileva (Institute of Chemistry, Faculty of Natural Sciences and Mathematics, Ss. Cyril and Methodius University in Skopje, Skopje, North Macedonia)24/09/2026, 17:05Analytical and environmental chemistryE-poster
Plants belonging to the genus Salvia are well known for their aromatic properties, which arise from a diverse mixture of volatile compounds. These compounds, primarily monoterpenes, oxygenated monoterpenes, sesquiterpenes, and oxygenated sesquiterpenes, represent the major constituents of Salvia essential oils and contribute significantly to their characteristic aroma and biological activity....
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Jasmin Suljagiฤ (University of Tuzla), Mersiha Suljkanovic (University of Tuzla)24/09/2026, 17:10Analytical and environmental chemistryE-poster
The valorization of berry pomace (aronia, blueberry, blackberry, raspberry) as a secondary raw material rich in biologically active compounds has become an attractive topic in recent years.1 Circular economy principles are driving numerous studies aimed at finding ways to transform this industrial by-product into a raw material for various applications.
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In this study, the extraction of... -
Mina Voliฤ Ollier (University of Belgrade, Innovation Centre of the Faculty of Technology and Metallurgy)24/09/2026, 17:15Analytical and environmental chemistryE-poster
Orange peel is an abundant agro-industrial by-product and a valuable source of essential oil rich in terpenes, particularly D-limonene. This study aimed to develop and optimize a solvent-free supercritical COโ extraction process for the recovery of high-value essential oil from waste orange peel and to evaluate the influence of extraction conditions on the yield and chemical profile of the...
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Milena Miljkovic24/09/2026, 17:20Analytical and environmental chemistryE-poster
Introduction: The Centaurium umbellatum Gilib. is an healing plant for a sick stomach. It works primarily to prevent fermentation and stimulates the stomach function, intestines and salivary glands. It also works in case of insufficient secretion of sodium acid. Itโs application improves the function of the stomach and intestines.1
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Material and Method: In this work was used a sample of... -
Milena Miljkovic24/09/2026, 17:25Analytical and environmental chemistryE-poster
Introduction: The Hypericum perforatum L. has multiple healing properties. It is recommended for cleaning wounds and blood. Because of itโs pain-relieving and astringent properties it found usage as wounds cleaner, additionally, excellent medicine for nerves and works to reduce spasm as well as dissolving mucus. Itโs essential oil is highly recommended.1
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Material and Method: In this work was... -
Mr Vlatko Bozhinoski24/09/2026, 17:30Analytical and environmental chemistryE-poster
Hemolysis is a common preanalytical source of interference that affects laboratory test results, particularly potassium (K) and lactate dehydrogenase (LDH) measurements [1,2]. This study investigated the impact of hemolysis on K and LDH results in routine laboratory practice and evaluated the performance of a hemolysis index (HI)-based correction method [3].
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A retrospective analysis was... -
Marijana Pejik (Alkaloid AD; Institute for Chemistry, Faculty of Natural Sciences and Mathematics)24/09/2026, 17:45Analytical and environmental chemistryE-poster
Antibiotics, particularly cephalosporins, represent an importat group of drugs with wide application in modern medicine. Cefixime, a semisystetic third generation cephalosporin, is commonly used in the form of an oral suspension, where sodium benzoate is used as a chemical preservative. Existing internal quantification procedures are based on separate analytical methods employing different...
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Sara Petreska (ALKALOID AD Skopje)24/09/2026, 17:50Analytical and environmental chemistryE-poster
Metamizole sodium monohydrate is a widely used non opioid analgesic and antipyretic, for which effective control of related substances is essential to ensure product quality. Although pharmacopoeial HPLC methods are established for this purpose, verification is required to confirm their suitability under routine laboratory conditions.
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The aim of this study was to verify a pharmacopoeial HPLC... -
Lina Bozhinovska24/09/2026, 17:55Analytical and environmental chemistryE-poster
Marbofloxacin is a potent antibiotic synthesized for veterinary use and treatment of advanced infections, which is often dosed in combination with other substances such as clotrimazole and dexamethasone. UV/Vis spectrophotometry, with its widespread and available instrumentation in research and testing laboratories, along with simple sample preparation, offers rapid analysis, which enables its...
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Marijana Nikoloska24/09/2026, 18:00Analytical and environmental chemistryE-poster
Risperidone is a widely used atypical antipsychotic acting primarily through antagonism of dopamine Dโ and serotonin 5-HTโ receptors, indicated for the treatment of schizophrenia, bipolar disorder, and related psychiatric conditions.1 Cleaning validation is a critical requirement in pharmaceutical manufacturing to prevent cross-contamination and ensure patient safety. This study focuses on the...
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Mrs Zhaklina Poposka Svirkova (Institute for Public Health of the Republic of Macedonia, 50 Divizija No 6, 1000 Skopje, Republic of North Macedonia Faculty of Medical Sciences, Goce Delcev University, Krste Misirkov 10A, 2000 Stip, Republic of North Macedonia)24/09/2026, 18:05Analytical and environmental chemistryE-poster
The widespread use of electronic cigarettes highlights the need for accurate nicotine determination to ensure consumer safety and regulatory compliance. HPLC is widely used for nicotine analysis; however, chromatographic performance depends heavily on the stationary phase. To address this, this study compares three HPLC column chemistries for nicotine determination in a commercially available...
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Dr Marjan Piponski (Quality Control Department in Pharmaceutical Company Replek Pharm)24/09/2026, 18:10Analytical and environmental chemistryE-poster
The dominant analytical techniques are of HPLC group of methods, predominantly with UV-PDA detecting for routne QC analyses in labs. Almost all of them are based on External Method of calculation of results. In this way, all standards and prepared samples are injected in replicates, which eliminate or minimize the errors of equipment malfunction or complexity and skills of analyst for sample...
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Stojance Kirovski (Alkaloid AD Skopje)24/09/2026, 18:15Analytical and environmental chemistryE-poster
Optimization of an analytical method for the determination of calcium and magnesium content using inductively coupled plasma (ICP) technique
Stojance Kirovski1,2, Aleksandra Damjanoska1,2, Cveta Dolikjoska-Trajkova1, Stefan Radevski1, Liljana Velkovska1,2
e-mail: skirovski@alkaloid.com.mk1Alkaloid AD Skopje, Blvd. Aleksandar Makedonski 12, Skopje, Republic of N....
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Dimitar Gusheski24/09/2026, 18:20Analytical and environmental chemistryE-poster
Cannabis is a complex phytochemical matrix rich in active cannabinoids such as ฮ9 tetrahydrocannabinol (ฮ9 THC) and Cannabidiol (CBD). Their accurate quantification is critical for quality control, patient safety, and regulatory compliance in medical cannabis.
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A laboratory developed High Performance Liquid Chromatography โ Diode Array Detector (HPLC DAD) method was compared with the... -
Monika Organdjieva (Alkaloid AD Skopje)24/09/2026, 18:25Analytical and environmental chemistryE-poster
Caffeine is a naturally occurring purine alkaloid commonly found in coffee, tea, and cocoa, and is widely recognized for its stimulating effects on the central nervous system. Due to its widespread consumption and biological activity, accurate determination of caffeine content is essential in the food, pharmaceutical, and analytical chemistry industries for quality control, product labeling,...
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Stefan Kirovski (Institute of Chemistry, Faculty of Natural Sciences and Mathematics, Ss. Cyril & Methodius University in Skopje)24/09/2026, 18:30Analytical and environmental chemistryE-poster
Human biomonitoring is an important approach for assessing human exposure to environmental contaminants and evaluating potential health risks associated with persistent organic pollutants (POPs). Among the most relevant POPs are organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs), which are characterized by their persistence, bioaccumulation potential, and ability to transfer...
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