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Öğe Advancements and innovations in solvent-based extraction techniques(Elsevier, 2024) Lanjwani, Muhammad Farooque; Khuhawar, Muhammad Yar; Tuzen, Mustafa; Fesliyan, Seçkin; Altunay, NailThe extraction techniques are very effective separation procedures and are widely employed in various applications in the field of chemistry. The applications of extraction techniques include waste treatment, food engineering, pharmaceutical, biological and environmental sample analyses. The preparation of samples is crucial part of analytical process. The extraction processes involve many solvents to extract the different samples. The selection of solvents are therefore important, because many solvents are toxic which are used in extraction process. These solvents may produce hazardous and toxic waste though consuming huge volume and are harmful for environment. The developing a new environmentally friendly solvent is a great important in the filed chemistry to decrease the number of anthropogenic actions associated to analytical laboratories. There are many novel eco-friendly solvents applied as extractant phases. These solvents, are more eco-friendly, low cost, simple, provide the low extraction times with well selectivity. In this chapter we discuss a number of solvents used in the extraction techniques such as deep eutectic solvents (DESs), supramolecular solvents, switchable solvents, ionic liquids (ILs), supercritical fluids used as solvents. © 2025 Elsevier Inc. All rights reserved.Öğe An air-assisted dispersive liquid phase microextraction method based on a hydrophobic magnetic deep eutectic solvent for the extraction and preconcentration of melamine from milk and milk-based products(Elsevier, 2023) Elik Adil; Fesliyan, Seçkin; Gürsoy, Nevciha; Ul Haq, Hameed; Castro-Muñoz, Roberto; Altunay NailIn the current research, a fast and sustainable air-assisted hydrophobic magnetic deep eutectic solvent-based dispersive liquid phase microextraction followed by UV–Vis spectrophotometry measurements was optimized for the extraction and determination of melamine in milk and milk-based products. The central composite design was applied for the optimization of factors affecting the recovery of melamine. Quantitative extraction of melamine was achieved using hydrophobic magnetic deep eutectic solvents prepared from a mixture of octanoic acid, aliquat-336, and cobalt(II) chloride. The optimum conditions for extraction were found as follows: 6 extraction cycles, pH 8.2, extraction solvent volume 260 µL, and acetone volume 125 µL. Interestingly, a centrifugation step was not required to achieve phase separation. Under the optimum conditions, melamine was determined in the linear range of 3–600 ng mL−1, the limit of detection (3Sblank/m) of 0.9 ng mL−1, and the enrichment factor of 144. The validation of the method was investigated by the analysis of reference materials. Consequently, the method was successfully applied for the analysis of melamine residues in milk and milk-based products.Öğe Gıda, kozmetik ve ilaç örneklerinden eritrosinin doğru ve güvenilir tayini için kemometrik modelleme ile doğal derin ötektik çözücülerin kullanımının araştırılması(Sivas Cumhuriyet Üniversitesi, 2024) Fesliyan, Seçkin; Elik, AdilBu tez çalışmasında, gıda, kozmetik ve ilaç numunelerinden eser miktarda Eritrosin'in tayininden önce ekstraksiyonu için yeşil, basit ve ucuz özellikleriyle yeni bir derin ötektik solvent bazlı sonikasyon destekli sıvı-sıvı mikro ekstraksiyon (DES-SA-LLME) yöntemi geliştirildi. Geliştirilen yöntemde Eritrosin'in seçici ve verimli ekstraksiyonu için 5 farklı derin ötektik çözücü (DES) hazırlandı ve test edildi. Uygun DES olarak 1,2-propandiol ve kolin klorürün sırasıyla 1:2 molar oranda karıştırılmasıyla elde edilen DES-1 seçildi. Deneysel parametreler (pH, DES-1 hacmi, sıcaklık ve sonikasyon süresi)'in basit ve hızlı optimizasyonu için, yüzey yanıt metodolojisine dayalı merkezi kompozit tasarımı (CCD) kullanıldı. Yöntemin analitik parametreleri araştırıldığında, çalışma aralığı 1-400 ng mL-1, zenginleştirme faktörü 175, tayin sınırı 1,0 ng mL-1 ve bağıl standart sapma % 2,2 olarak hesaplandı. DES-SA-LLME yöntemi karmaşık numune matrikslerinden Eritrosin'in ayrılması ve tayini için oldukça tatmin edici sonuçlar sağladı. Geri kazanım değerleri %94,8-102,7 aralığındaydı.Öğe Introduction and overview of applications related to green solvents used in sample preparation(Elsevier, 2024) Fesliyan, Seçkin; Haq, Hameed Ul; Altunay, Nail; Tuzen, Mustafa; Azooz, Ebaa Adnan; Muhamad, Zainab HassanSample preparation is critical to the entire analytical procedure because it enables precise and accurate analyte evaluation by removing matrix challenges. Traditional sample preparations are regarded as the costliest, most time-consuming, and most hazardous organic solvents. Using environmentally friendly solvents in analytical methods for sample preparation and following green analytical chemistry principles adds greatly to the advancement of green analytical approaches. Utilizing their solvation characteristics and greenness benefits, these sustainable natural solvents can be designed as potential extractant for their targeted applications, permitting efficient and safe sample preparation before instrumental evaluation. In this chapter, we offer a brief overview of recent developments in the prominent environmentally friendly solvents used in analytical methods. The amphiphilic solvents, supramolecular solvents, hydrophilicity switchable solvents, ionic liquids, and deep eutectic solvents were explained. as well as applications of green solvents, paired with different methods for extremely selective and sensitive assessment. Lastly, we examine potential prospects in this field. © 2025 Elsevier Inc. All rights reserved.
