Article
Chemistry, Multidisciplinary
Gizem Kahve Yildirim, Yavuz Surme
Summary: A micelle mediated phase separation and preconcentration process was developed for the determination of trace level Pb (II) ions in water samples using flame atomic absorption spectrometry (FAAS) after chelation with thionine. The selectivity of the method was validated in the presence of five different possible chelatable metal ions with thionine ligand. The parameters of the method, including pH, surfactant concentration, ligand concentration, reaction temperature, incubation time and matrix ions, were optimized. The method showed good reliability with a relative standard deviation (RSD %) of less than 5% and had a detection limit (LOD) and quantitation limit (LOQ) of 1.5 and 5 μg/L, respectively.
Article
Chemistry, Multidisciplinary
Melika Hejazi Khah, Parastoo Jamshidi, Farzaneh Shemirani
Summary: A magnetic solid phase extraction method using a Fe3O4, MoS2, and chitosan composite adsorbent was developed for simultaneous preconcentration of Pb(II), Cd(II), Ni(II) and Zn(II). The adsorbent exhibited strong magnetic properties and high surface area, making it highly efficient for heavy metal preconcentration. The method showed successful performance in determining heavy metals in real samples, with optimized preconcentration conditions and detailed characterization of the adsorbent and interactions between components.
RESEARCH ON CHEMICAL INTERMEDIATES
(2021)
Article
Chemistry, Applied
Bedrihan Kartoglu, Aleyna Bahcivan, Sezin Erarpat, Ahsen Bayraktar, Sezgin Bakirdere
Summary: Cobalt nanoleaves (Co-NL) were synthesized by microwave-assisted synthesis and used as an adsorbent in a preconcentration method (CNL-PM) to concentrate trace levels of lead in blue butterfly tea extract and tap water. The adsorbent was characterized using XRD, SEM, and FTIR. Measurements were performed using SQT-FAAS. Under optimum conditions, the LOD and LOQ for the CNL-PM-SQT-FAAS system were 2.4 and 7.9 μg/kg, respectively. Recovery experiments were conducted for tap water samples and the developed method was applied to butterfly tea extract samples, resulting in lead concentrations of 0.26 ± 0.01 and 0.36 ± 0.01 μg/g for A and B tea samples, respectively.
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
(2023)
Article
Chemistry, Analytical
Alexa Rihana-Abdallah, Zhe Li, Katherine C. Lanigan
Summary: The determination of heavy metals in drinking water is crucial for quality assessment and pipeline corrosion detection. This study developed a simple, cost-effective method based on cloud point extraction for preconcentration and determination of iron, lead, and cadmium, with a 20-fold reduction in detection limit. Results demonstrate high accuracy and reproducibility of this method for the analysis of iron, lead, and cadmium in water samples by FAAS.
ANALYTICAL LETTERS
(2022)
Article
Spectroscopy
Joanna Dobrzynska, Marzena Dabrowska, Ryszard Dobrowolski, Kinga Morlo
Summary: Pt(IV) ion-imprinted thiocyanato-functionalized SBA-15 material (Pt(IV)S1) was used for preconcentration of Pt(IV) ions from digested geological samples before ETAAS determination. The ion-imprinted material showed high adsorption affinity and selectivity towards Pt(IV) ions. The proposed procedure achieved a high enrichment factor of 38 and a low limit of quantification of 0.079 mg kg-1.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2023)
Article
Chemistry, Applied
Hassan Elzain Hassan Ahmed, Ali Mohammednour Ali Mohammed, Mustafa Soylak
Summary: A novel magnetic Luffa@TiO2 sorbent was synthesized and characterized for the solid phase extraction of Pb(II). Optimized analytical parameters and validated with certified reference materials, the method showed good preconcentration efficiency and low detection and quantification limits for both liquid and solid samples.
Article
Chemistry, Analytical
Sai D. Krishna, N. N. Meeravali, A. C. Sahayam
Summary: A non-ionic nanoaggregate sensitized and salt-induced cloud point extraction (NS-CPE) method was developed for ultra-trace determination of beryllium in environmental waters. The method achieved high sensitivity and accuracy, providing reliable results for beryllium analysis.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Analytical
Mustafa Soylak, Mohamed Alasaad, Ozgur Ozalp
Summary: Magnesium cobaltite (MgCo2O4) nanosorbent was prepared and applied for enrichment and separation of Pb(II) in solid phase extraction. Optimized parameters were determined to achieve the best recovery of Pb(II) ions. The developed SPE method showed satisfactory results in the determination of lead(II) in water and food samples.
MICROCHEMICAL JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Elnaz Koosha, Mojtaba Shamsipur, Fatemeh Salimi, Majid Ramezani
Summary: The method introduced in this study utilizes precipitation combined with flame atomic absorption spectrometry to determine trace amounts of cadmium and lead ions, showing linear dynamic ranges, detection limits, and enhancement factors suitable for the analysis of target metal ions in natural water samples.
SEPARATION SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Kubra Turan, Rukiye Saygili Canlidinc, Orhan Murat Kalfa
Summary: In this study, preconcentration of trace amounts of copper ions was achieved using a Cu(II)-IAC sorbent and SPE method. The optimized conditions and characterization of the sorbents were studied, with good recoveries obtained for spiked analysis in tap water and certified reference materials. The accuracy and validity of the proposed method were confirmed through comparison with literature data.
TURKISH JOURNAL OF CHEMISTRY
(2022)
Article
Engineering, Environmental
Celal Duran, Aslihan Yilmaz Camoglu, Duygu Ozdes, Olcay Bekircan
Summary: This research successfully achieved the simultaneous analysis of Cu(II), Cd(II), and Ni(II) ions in water samples by using a novel organic co-precipitant CCMBATT in combination with carrier element-free co-precipitation technique. The highest efficiency in terms of heavy metal recovery was achieved by optimizing factors such as solution pH, co-precipitant concentration, and sample volume.
WATER SCIENCE AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Efe Sinan Aydin, Buse Tugba Zaman, Gamze Dalgic Bozyigit, Sezgin Bakirdere
Summary: In this study, the detection sensitivity of a conventional flame atomic absorption spectrophotometer (FAAS) for manganese (Mn2+) determination was enhanced by using a preconcentration method on wastewater samples. The synthesis of flower-shaped Ni(OH)2 nanomaterials as sorbent material in the preconcentration procedure was conducted. By optimizing the extraction method, including pH, desorption solvent concentration and volume, mixing type and period, nanoflower amount, and sample volume, the detection limit of the optimized method was determined to be 2.2 μg L-1, achieving a 41-fold enhancement in detection power compared to direct FAAS measurement. Spike recovery experiments with domestic wastewater confirmed the feasibility of the proposed method, with percent recoveries ranging from 95-120%.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)
Article
Chemistry, Multidisciplinary
Yiting Zheng, Qingxuan Li, Chenfei Wang, Ming Su
Summary: This paper introduces a new method for enhancing the sensitivity of fluorescence detection of lead ions in water by utilizing the volume reduction of hydrogels upon dehydration. The method is low-cost, easy to operate, and highly sensitive, making it suitable for detecting lead ions in drinking water.
Article
Chemistry, Physical
Hossein Abdolmohammad-Zadeh, Zahra Ayazi, Saeed Aliyari
Summary: A simple co-precipitation method was applied to synthesize Al(x)MgFe2-xO4 nanoparticles, which were further used for magnetic solid-phase extraction. The developed method showed a good linear dynamic range, low detection limit, and high intra- and inter-day precision.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Meihong Zhan, Weimin Gao, William Nguyen, Hongmei Yu, Eric Amador, Wei Chen
Summary: Triadic silica-supported polyhexamethylene guanidine@nano-hydroxyapatite (HAP) composites were prepared and used for solid phase extraction of Cr (VI) in a micro-column system, with its determination by flame atomic absorption spectrometry (FAAS). The results showed that the triadic silica-supported nano-HAP composites efficiently adsorbed Cr (VI) at pH 4.0-6.0, while almost no adsorption of Cr (III) occurred. The method exhibited good linearity, detection limit, and precision for Cr (VI) determination, and it was successfully applied to the analysis of chromium contents in cereal and water samples.
MATERIALS TODAY ADVANCES
(2022)
