Supramolecular solvent based liquid–liquid microextraction of aluminum from water and hair samples prior to UV-visible spectrophotometric detection

RSC Advances ◽  
2015 ◽  
Vol 5 (77) ◽  
pp. 62433-62438 ◽  
Author(s):  
Mansoor Khan ◽  
Mustafa Soylak
Keyword(s):  
Spectrophotometric Determination ◽  
New Method ◽  
Spectrophotometric Detection ◽  
Hair Samples ◽  
Supramolecular Solvent ◽  
Uv Visible ◽  
Liquid Microextraction

A new method for the microextraction of aluminum from water and hair samples has been developed using a supramolecular solvent (undecanol–tetrahydrofuran) prior to UV-visible spectrophotometric determination.

Supramolecular based-ligandless ultrasonic assisted-dispersion solidification liquid–liquid microextraction of uranyl ion prior to spectrophotometric determination with dibenzoylmethane

RSC Advances ◽  
2016 ◽  
Vol 6 (3) ◽  
pp. 2394-2401 ◽  
Author(s):  
Ardeshir Shokrollahi ◽  
Hadi Behrooj Pili
Keyword(s):  
Spectrophotometric Determination ◽  
Environmentally Friendly ◽  
Uranyl Ion ◽  
Spectrophotometric Detection ◽  
Ultrasonic Assisted ◽  
Environmentally Friendly Method ◽  
Liquid Microextraction

A simple and environmentally friendly method has been developed for preconcentration of uranyl ion by supramolecular based-ligandless ultrasonic assisted-dispersion solidification liquid–liquid microextraction before spectrophotometric detection.

Supramolecular solvent-based dispersive liquid–liquid microextraction of copper from water and hair samples

RSC Advances ◽  
2015 ◽  
Vol 5 (50) ◽  
pp. 40422-40428 ◽  
Author(s):  
Funda Aydin ◽  
Erkan Yilmaz ◽  
Mustafa Soylak
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flame Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Flame Atomic Absorption ◽  
Hair Samples ◽  
Supramolecular Solvent ◽  
Separation And Preconcentration ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

A supramolecular solvent based dispersive liquid–liquid microextraction (SM-DLLME) procedure has been established for the separation and preconcentration of Cu(ii) before its determination by microsampling flame atomic absorption spectrometry.

Dispersive Liquid-Liquid Microextraction Based on Ionic Liquid and Spectrophotometric Determination of Bilirubin in Biological Samples

2020 ◽  
Vol 16 (5) ◽  
pp. 652-659
Author(s):  
Asiye A. Avan ◽  
Hayati Filik
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Biological Samples ◽  
Urine Samples ◽  
Spectrophotometric Detection ◽  
Full Color ◽  
Dispersive Liquid Liquid Microextraction ◽  
Urine And Serum ◽  
Liquid Microextraction

Background: An Ionic Liquid-based based Dispersive Liquid-Liquid Microextraction (IL-DLLME) method was not applied to preconcentration and determination of bilirubin. Ionic Liquids (ILs) are new chemical compounds. In recent years, Ionic Liquids (ILs) have been employed as alternative solvents to toxic organic solvents. Due to these perfect properties, ILs have already been applied in many analytical extraction processes, presenting high extraction yield and selectivity for analytes. Methods: In this study, IL-DLLME was applied to biological samples (urine and serum) for the spectrophotometric detection of bilirubin. For bilirubin analysis, the full-color development was based on the reaction with periodate in the presence of hydrochloric acid. The high affinity of bilirubin for the ionic liquid phase gave extraction percentages above 98% in 0.3 M HCl solution. Results: Several IL-extraction parameters were optimized and room temperature ionic liquid 1-butyl- 1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide and ethanol were used as extraction and disperser solution. The linear range was found in the range of 0.5-6.0 μM (0.3-3.5 μg mL-1) and the limits of detection of the proposed method was 0.5 μM (0.3 μg mL-1). The proposed method was applied for the preconcentration and separation of trace bilirubin in real urine samples. Also, the recoveries for bilirubin in spiked biological samples (urine and serum) were found to be acceptable, between 95-102%. Conclusion: The proposed IL-DLLMEapproach was employed for the enrichment and determination of trace levels of bilirubin in urine samples using NaIO4 as an oxidizing agent and Uv-vis spectrophotometric detection. The periodate oxidation of bilirubin is rapid, effective, selective, and simple to perform. The method contains only HCl, NaOI4, and an anionic surfactant. The method may be useful for economizing in the consumption of reagents in bilirubin determining. The IL-DLLMEmethod ensures a high yield and has a low toxicity no skin sensitization, no mutagenicity and no ecotoxicity in an aquatic environment since only very low quantities of an IL is required. For full-color formation, no any extra auxiliary reagents are required. Besides, the IL-DLLME technique uses a low-cost instrument such as Uv-vis which is present in most of the medical laboratories.

Supramolecular Solvent Based Liquid-Liquid Microextraction for Preconcentration of Selected Fluoroquinolone Antibiotics in Environmental Water Sample Prior to High Performance Liquid Chromatographic Determination

2019 ◽  
Vol 15 (6) ◽  
pp. 607-615 ◽  
Author(s):  
Shirley K. Selahle ◽  
Philiswa N. Nomngongo
Keyword(s):  
High Performance ◽  
Chromatographic Determination ◽  
Decanoic Acid ◽  
Environmental Water ◽  
High Performance Liquid Chromatographic ◽  
Array Detector ◽  
Optimum Conditions ◽  
Limit Of Quantification ◽  
Supramolecular Solvent ◽  
Liquid Microextraction

Background and Objective: A rapid, simple and environmental friendly supramolecular solvent (SUPRAS) based liquid-liquid microextraction method for preconcentration of ciprofloxacin (CIPRO), danofloxacin (DANO) and enrofloxacin (ENRO) from wastewater was developed. Methods: This microextraction technique was coupled with high-performance liquid chromatography equipped with a diode array detector (HPLC-PDA) for detection and separation of the antibiotics. The SUPRAS composed of decanoic acid and tricaprylymethylammonium chloride. Optimum conditions for the extraction and preconcentration of all the antibiotics were obtained using surface response methodology (RSM) based on Box-Behnken design. Results: Under optimum conditions, the limits of detection (LOD) and limit of quantification (LOQ) ranged from 0.06-0.14 µg L−1 and 0.22-0.47 μg L−1, respectively with the preconcentration factors ranging from 153-241. The linear dynamic ranges were between LOQ and 850 µg L−1 with correlation coefficients ranging from 0.9928 to 0.9999. The intra-day (n = 15) and inter-day (n = 5) precisions (expressed in terms of %RSD) for 50 µg L−1 of CIPRO, DANO and ENRO were in the range of 3.3–4% and 4.1–5.8%, respectively. Conclusion: Lastly, the developed method was used for the extraction, preconcentration and quantification of selected CIPRO, DANO and ENRO in influent and effluent wastewater samples.

A new method for spectrophotometric determination of thiomersal in biologicals

Biologicals ◽  
1995 ◽  
Vol 23 (1) ◽  
pp. 65-69 ◽  
Author(s):  
Keshaw Prasad Shrivastaw ◽  
Sarbjit Singh
Keyword(s):  
Spectrophotometric Determination ◽  
New Method

Extraction of Lead from Water Using Homogeneous Liquid–Liquid Microextraction via Flotation Assistance Method and UV-Vis Spectrophotometric Determination

2018 ◽  
Vol 40 (5) ◽  
pp. 291-296
Author(s):  
Bahareh Moavenian ◽  
Majid Haji Hosseini ◽  
Masoud Arabieh ◽  
Mohammad Reza Pourjavid ◽  
Mahmoud Reza Sohrabi
Keyword(s):  
Spectrophotometric Determination ◽  
Homogeneous Liquid ◽  
Liquid Microextraction
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