Article
Chemistry, Analytical
Daisuke Kozaki, Masanobu Mori, Shinichi Hamasaki, Tomotaka Doi, Souma Tanihata, Atushi Yamamoto, Takeshi Takahashi, Koutarou Sakamoto, Shigeto Funado
Summary: A simple method using enclosed quartz cell and cold vapour-atomic absorption spectrometry is proposed for determining total inorganic mercury in solution, achieving similar precision to conventional methods while reducing sample volume, reductant, and cost.
ANALYTICAL METHODS
(2021)
Article
Chemistry, Analytical
Yongchun Liu, Jie Zou, Bin Luo, Hairong Yu, Zhigang Zhao, Hui Xia
Summary: Using natural plant extracts as auxiliary matrix or photocatalysts can enhance the efficiency and sensitivity of photochemical vapor generation atomic fluorescence spectrometry for trace mercury determination, while reducing biological toxicity and secondary pollution. This green and sensitive method provides an experimental basis for expanding the photochemical vapor generation system.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Analytical
Yanping Wang, Yuemei Chen, Kejun Li, Jinrong Zhou, Xin Yuan, Mei Zhang, Ke Huang
Summary: In this work, a portable analytical system based on point discharge chemical vapor generation atomic emission spectrometry (PD-CVG-AES) coupling with gold filament enrichment was designed. The highly sensitive analysis of Hg2+ indirectly realized the detection of ascorbic acid (AA). The measurement is based on the fact that Ag+ can decrease the concentration of Hg2+ by forming Ag-Hg amalgam in the presence of the reductant SnCl2, while AA can pre-reduce Ag+ to Ag0, leading to the generation of silver nanoparticles (Ag NPs). The developed novel analytical strategy broadens the application of microplasma-based AES and offers a higher level of sensitivity compared to current AA detection techniques.
ANALYTICA CHIMICA ACTA
(2024)
Article
Spectroscopy
Lanlan Li, Chenxi Jiang, Jing Xiao, Hong Luo, Shu Zhang, Zhirong Zou, Ke Huang
Summary: Selenium, mercury and arsenic are widely distributed in the environment, and their toxicity depends on their concentration and forms. Accurate monitoring of these elements is necessary. Photochemical vapor generation (PVG) is a promising method for analytical atomic spectrometry, and it has been applied to determine selenium, mercury and arsenic with various separation techniques. This review summarizes the applications of PVG-analytical atomic spectrometry in selenium, mercury and arsenic speciation analysis.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2023)
Article
Chemistry, Analytical
Chunhai Yu
Summary: This study demonstrated that soluble iron can lead to overestimation of mercury values during analysis using CV-AAS, but the issue can be minimized by using matrix-matching calibration standards prepared in 50 mg L-1 iron solution. It was also found that stannous chloride is not affected by soluble iron in the presence of NaBH4.
ANALYTICAL SCIENCES
(2021)
Review
Chemistry, Analytical
Guanghui Niu, Alexander Knodel, Sebastian Burhenn, Sebastian Brandt, Joachim Franzke
Summary: The development of miniature, sensitive, high throughput, and in-situ analytical instruments using dielectric barrier discharge (DBD) has become a hot topic in modern analytical chemistry. DBD offers advantages such as easy operation, simple configuration, ambient working temperature and pressure, low power consumption, and miniature dimension. Its applications in analytical atomic spectrometry include serving as excitation or atomization sources in AES, AAS, and AFS, as well as functioning as a vapor generation system.
ANALYTICA CHIMICA ACTA
(2021)
Article
Chemistry, Analytical
Meiyi Xie, Xiaotang Hao, Xun Jiang, Weiting Liu, Tiantian Liu, Han Zheng, Mei Wang
Summary: The method combines ultrasound-assisted dual-cloud point extraction with high-performance liquid chromatography with hydride generation atomic fluorescence spectrometry to simultaneously preconcentrate and determine mercury species in water and soil samples. The detection process, including two extraction steps, takes only 6 minutes with a wide linear range and low detection limits for inorganic mercury and methylmercury. It is suitable for the determination of trace mercury in environmental samples with good recoveries.
JOURNAL OF SEPARATION SCIENCE
(2021)
Article
Spectroscopy
Jarol R. Miranda-Andrades, Marlin J. Pedrozo-Penafiel, Joseane A. Mendes, Ricardo Queiroz Aucelio
Summary: The determination of thiomersal was successfully made by utilizing the temporally selective photo-degradation method mediated by graphene quantum dots and TiO2 nanoparticles. This method allows for the analysis of different mercury species in a short period of time and can be applied to the determination of thiomersal in vaccines.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2022)
Article
Engineering, Multidisciplinary
Thi Phuong Thao Nguyen, Moon Hyeon Kim, Yoon Ku Kwon, Yong Seok Hong
Summary: Extensive modifications were made to a commercially-available cold-vapor atomic absorption mercury analyzer to enable fast and stable real-time Hg-0 detection under harsh conditions with additional HCl, NO, and NH3. The fully modified analyzer showed similar Hg-0 signals to those based on factory-certified permeation tubes. The oxidation activity of gaseous Hg-0 was found to be associated with the catalyst and influenced by the concentration of HCl in gas streams with NO and NH3.
Article
Biochemistry & Molecular Biology
Adedeji Adetunji, Theresa Casey, Jackeline Franco, Devendra Shah, Yewande Fasina
Summary: Proteomic analysis revealed significant changes in the spleen proteome of broiler chickens infected with Salmonella enteritidis, including alterations in cell cycle progression, cytoskeleton, mRNA processing, redox homeostasis, lysosomal activities, energy production, and developmental progression.
Article
Chemistry, Analytical
Jaromir Vyhnanovsky, Dilek Yildiz, Barbora Stadlerova, Stanislav Musil
Summary: The study achieved photochemical vapor generation of bismuth with optimal conditions determined through investigating the influence of sensitizers and reaction medium flow rate. Combining PVG with atomic fluorescence spectrometry can provide low limits of detection at a low operation cost.
MICROCHEMICAL JOURNAL
(2021)
Article
Spectroscopy
Gilberto da S. Coelho Jr, Daniel L. G. Borges, Milan Svoboda, Jiri Dedina, Jan Kratzer
Summary: In this study, a plasma-mediated vapor generation (PMVG) by a dielectric barrier discharge (DBD) was optimized for the detection of inorganic mercury and methylmercury using atomic absorption spectrometry (AAS). The efficiency of PMVG of both species was quantified and the conversion of mercury species to mercury free atoms inside the DBD reactor was proven. The PMVG-AAS method showed similar sensitivity and limit of detection (LOD) compared to the conventional chemical vapor generation (CVG) approach, but with significantly worse LODs due to the smaller sample volume.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2023)
Review
Polymer Science
Ilya Nifant'ev, Pavel Ivchenko
Summary: Biodiesel faces limitations due to poor cold-flow properties, but additives show promise in enhancing its performance.
Article
Chemistry, Multidisciplinary
Abolghasem Zanganeh, Hamid Reza Ghasempour, Mohammad Kazem Koohi, Nasser Karimi
Summary: A novel functionalized magnetic metal-organic framework (MOF) was synthesized and applied for the extraction and determination of Hg(II) ions in food samples. The new material, modified with 1,3,4-Thiadiazole-2,5-dithiol chelator, exhibited high efficiency in separating and enriching Hg(II) ions. The optimized extraction conditions were determined using experimental design approach, and the elution step was performed using 0.7 mol L-1 HCl solution.
RESEARCH ON CHEMICAL INTERMEDIATES
(2023)
Article
Biochemistry & Molecular Biology
Maria Luisa Astolfi, Marcelo Enrique Conti, Martina Ristorini, Maria Agostina Frezzini, Marco Papi, Lorenzo Massimi, Silvia Canepari
Summary: Bees and their products are useful bioindicators of anthropogenic activities and can help overcome the limitations of air quality networks. This study developed a simple analytical method to determine mercury content in bees and beehive products, and evaluated its performance on real samples collected in six areas of the Lazio region, Italy.
Article
Chemistry, Analytical
Asif Ali, Zahid Hussain, Muhammad Zahid, Lubna Qamar, Amir Zada, Muhammad Balal Arain, Syed Muhammad Salman, KhalidMohammed Khan
Summary: A novel spectrophotometric method has been developed for the analysis of cadmium, cobalt, copper, iron, and lead. The method involves microwave-assisted in-situ complexation of metal ions with a ligand formed by the reaction of phenol, sodium nitrite, and streptomycin in an acidic medium. The method was successfully applied to the analysis of various real samples, including pharmaceuticals and industrially important products such as batteries. Optimum pH values and reagent concentrations were determined for each metal, and the method showed good sensitivity and detection limits for each metal.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Kanwal Rajput, Hassan Imran Afridi, Tasneem Gul Kazi, Farah Naz Talpur, Jameel Ahmed Baig
Summary: Neurodegeneration disorders, such as Parkinson's disease, are associated with electrolyte imbalances which may serve as bio-indicators. This study found higher levels of Ca and Mg, and lower levels of Na and K, in Parkinson's disease patients compared to healthy controls. Additionally, electrolyte levels in blood serum and plasma were lower in patients at all stages of PD compared to healthy individuals.
BIOLOGICAL TRACE ELEMENT RESEARCH
(2021)
Article
Biochemistry & Molecular Biology
Ghulam Qadir Chanihoon, Hassan Imran Afridi, Farah Naz Talpur, Tasneen Gul Kazi, Jameel Ahmed Baig
Summary: This research examined the relationship between carcinogenic element cadmium (Cd) and anti-carcinogenic element zinc (Zn) in the scalp hair and blood samples of female breast cancer patients, finding that Cd levels were significantly higher in breast cancer patients compared to healthy subjects, while Zn levels showed the opposite trend.
BIOLOGICAL TRACE ELEMENT RESEARCH
(2022)
Article
Chemistry, Applied
Fazeela Kandhro, Tasneem Gul Kazi, Hassan Imran Afridi, Jameel Ahmed Baig
Summary: This study compared the levels of electrolytes and essential trace elements in milk samples from different cattle species and humans, finding variations in the content of these elements among different animal species, with human milk having the lowest concentrations except for selenium. Additionally, there were differences in the percentage of elements in whey compared to total milk samples across different species.
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
(2022)
Article
Chemistry, Analytical
Ayaz Ali Lashari, Tasneem Gul Kazi, Jameel Ahmed Baig, Hassan Imran Afridi, Anees-Ur-Rahman Chandio, Ghulam Qadir Chanihoon, Anjum Lashari
Summary: This study investigates the volatilization of selenium during coal combustion at different temperatures and reveals variations in the total selenium content among coal samples from different coal fields.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Ghulam Fareed, Jameel Ahmed Baig, Tasneem Gul Kazi, Hassan Imran Afridi, Khalil Akhtar, Imam Bakhsh Solangi
Summary: The aim of this study was to assess the levels of heavy metals in sugar industry products and effluents, and estimate the intake and toxic risks of these metals for different age groups of sugar industry workers’ families. The results showed that the intake of lead and cadmium was lower than the provisional acceptable intake levels recommended by WHO.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2022)
Article
Engineering, Electrical & Electronic
Jameel Ahmed Baig, Mir Muhammad, Khalil Akhtar, Hassan Imran Afridi, Tasneem Gul Kazi, Junaid Mirza, Shakoor Ahmed Solangi, Ashfaque Ali Bhutto
Summary: A new electrochemical method utilizing a silver nanoparticle amalgam paste microelectrode and square wave cathodic stripping voltammetry was developed for the detection of cefixime. The method demonstrated high accuracy, precision, sensitivity, and selectivity, and was successfully applied in pharmaceutical preparations and biological liquids.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Analytical
Khalil Akhtar, Jameel Ahmed Baig, Tasneem Gul Kazi, Sirajuddin, Hassan Imran Afridi, Farah Naz Talpur, Imam Bakhsh Solangi, Suraya Samaijo
Summary: A novel method using APBA-ZrO2-NPs/Au electrode was developed for sensitive detection of F- in water and toothpaste, showing excellent linear relationships and detection limits. The electrode also demonstrated high selectivity and the ability to exclude interference from various competing ions.
MICROCHEMICAL JOURNAL
(2022)
Article
Chemistry, Analytical
Ayaz Ali Lashari, Tasneem Gul Kazi, Jameel Ahmed Baig, Hassan Imran Afridi, Mehran Ali Laghari, Arsalan Ahmed Qureshi, Anjum Lashari, Asif Unar
Summary: This study investigated the chemical association of cadmium in coal samples from various regions in Pakistan. Two methods, BCR-SE and VA-SSE, were used to extract and analyze the Cd fractions in the samples. The results showed that the majority of Cd was bound to the organic phase of the coal samples.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2023)
Article
Environmental Sciences
A. Lashari, T. G. Kazi, H. I. Afridi, J. A. Baig, M. B. Arain, A. A. Lashari, F. Kandhro
Summary: The global use of petroleum hydrocarbons has led to an increase in the release of contaminants in the environment, affecting soil, groundwater, and vegetation. This study evaluated the dispersion of vanadium (V) in soil, vegetables, fruits, and animal feed samples cultivated in agricultural fields using waste soil/mud from oil well drilling. The results showed that the test samples had significantly higher levels of V compared to the control samples. The study also assessed the risk of V intake through consuming groundwater, vegetables, and fruits obtained from exposed agricultural land.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Suraya Samejo, Jameel Ahmed Baig, Siraj Uddin, Tasneem Gul Kazi, Hassan Imran Afridi, Aysen Hol, Firdous Imran Ali, Sajjad Hussain, Khalil Akhtar, Saima Perveen, Ashfaque Ali Bhutto
Summary: The study synthesized and characterized D-Fe3O4-NC and applied it for the adsorptive removal of Cd, Cr, and Pb from water. The adsorption capacities of D-Fe3O4-NC for Cd, Cr, and Pb were 74.4, 76.0, and 75.2 mg g-1, respectively. The adsorption isotherms fitted the Freundlich Model equation well, and the adsorption kinetics followed pseudo-second-order kinetics. D-Fe3O4-NC showed excellent recyclable efficiency and was able to remove toxic metals from water samples with a high removal rate (>93%).
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Analytical
Suraya Samejo, Jameel Ahmed Baig, Tasneem Gul Kazi, Hassan Imran Afridi, Aysen Hol, Alaa Dahshan, Khalil Akhtar, Shakoor Ahmed Solangi, Saima Perveen, Sajjad Hussain
Summary: Solid-phase extraction (SPE) using magnesium oxide nanoparticles (D-MgO-NPs) synthesized from biogenic sources Duranta erecta followed by fabricating its chitosan-based polymeric composite (D-MgO-NC) showed high selectivity and sensitivity for the SPE of heavy metals (HMs) such as arsenic (As), cadmium (Cd), and lead (Pb) from drinking water. The synthesised D-MgO-NC-based SPE method demonstrated excellent performance in terms of detection limits and relative standard deviation for As, Cd, and Pb. It was successfully applied for the quantitative detection of HMs in groundwater samples.
ANALYTICAL METHODS
(2023)
Article
Multidisciplinary Sciences
Ashfaque Ali Bhutto, Jameel Ahmed Baig, Sirajuddin, Tasneem Gul Kazi, Reyes Sierra-Alvarez, Khalil Akhtar, Sajjad Hussain, Hassan Imran Afridi, Aysen Hol, Suraya Samejo
Summary: The biosynthesis of iron oxide nanoparticles and their application in removing toxic metals from water were studied. The synthesized materials showed excellent adsorption capacity for the removal of Cd, Ni, and Pb. The proposed nanocomposite exhibited favorable adsorption kinetics and thermodynamics. The study concluded that this nanocomposite is efficient in removing toxic metals from drinking water.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Zaib Un Nisa Mughal, Huma Shaikh, Jamil Ahmed Baig, Shahabuddin Memon, Sirajuddin, Shahnila Shah
Summary: An innovative label-free electrochemical sensor was developed for selective detection of pig DNA. The sensor was characterized using various techniques and its performance was analyzed using cyclic voltammetry and electrochemical impedance spectroscopy. The sensor was used to establish an electrochemical method for the detection of pig DNA and the parameters were optimized. The study also validated the selectivity and applicability of the sensor for pig DNA.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Fazal Elahi, Muhammad Balal Arain, Wajid Ali Khan, Nasrullah Shah, Tasneem Gul Kazi
Summary: An ultrasound-assisted deep eutectic solvent liquid-liquid microextraction (UA-DES-LLME) technique was developed for selective speciation, extraction, and preconcentration of chromium species, with successful application in the determination of Cr(VI) and Cr(III) in tea and water samples.
