Subjects -> CHEMISTRY (Total: 986 journals)
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ANALYTICAL CHEMISTRY (59 journals)

Showing 1 - 46 of 46 Journals sorted alphabetically
Accounts of Chemical Research     Hybrid Journal   (Followers: 63)
Acta Analytica     Hybrid Journal   (Followers: 6)
Advances in Analytical Chemistry     Open Access   (Followers: 29)
American Journal of Analytical Chemistry     Open Access   (Followers: 31)
Analitika i kontrol` (Analytics and control)     Open Access  
Analytica Chimica Acta     Hybrid Journal   (Followers: 43)
Analytica Chimica Acta : X     Open Access  
Analytical and Bioanalytical Chemistry     Hybrid Journal   (Followers: 27)
Analytical and Bioanalytical Chemistry Research     Open Access   (Followers: 2)
Analytical Chemistry     Hybrid Journal   (Followers: 238)
Analytical Chemistry Insights     Open Access   (Followers: 21)
Analytical Chemistry Letters     Hybrid Journal   (Followers: 2)
Analytical Letters     Hybrid Journal   (Followers: 9)
Annual Review of Analytical Chemistry     Full-text available via subscription   (Followers: 12)
Chemical Data Collections     Hybrid Journal  
Chinese Journal of Analytical Chemistry     Full-text available via subscription   (Followers: 5)
Composites Communications     Full-text available via subscription   (Followers: 2)
Comprehensive Analytical Chemistry     Full-text available via subscription   (Followers: 7)
Critical Reviews in Analytical Chemistry     Hybrid Journal   (Followers: 27)
Current Analytical Chemistry     Hybrid Journal   (Followers: 10)
Drug Testing and Analysis     Hybrid Journal   (Followers: 10)
Electroanalysis     Hybrid Journal   (Followers: 6)
Field Analytical Chemistry and Technology     Hybrid Journal   (Followers: 6)
International Journal of Analytical Chemistry     Open Access   (Followers: 21)
International Journal of Environmental Analytical Chemistry     Hybrid Journal   (Followers: 7)
International Journal of Polymer Analysis and Characterization     Hybrid Journal   (Followers: 8)
Journal of Analysis and Testing     Hybrid Journal  
Journal of Analytical Atomic Spectrometry     Hybrid Journal   (Followers: 8)
Journal of Analytical Chemistry     Hybrid Journal   (Followers: 21)
Journal of Electroanalytical Chemistry     Hybrid Journal   (Followers: 7)
Journal of Essential Oil Research     Hybrid Journal   (Followers: 3)
Journal of Progressive Research in Chemistry     Open Access  
Journal of Radioanalytical and Nuclear Chemistry     Hybrid Journal   (Followers: 7)
Journal of Thermal Analysis and Calorimetry     Hybrid Journal   (Followers: 24)
Microchemical Journal     Hybrid Journal   (Followers: 4)
Nature Catalysis     Hybrid Journal   (Followers: 6)
Nigerian Journal of Chemical Research     Full-text available via subscription   (Followers: 1)
Opflow     Full-text available via subscription   (Followers: 1)
Pharmaceutical Analytical Chemistry: Open Access     Open Access   (Followers: 1)
Phytochemical Analysis     Hybrid Journal   (Followers: 3)
Polish Journal of Chemical Technology     Open Access   (Followers: 1)
Surface and Interface Analysis     Hybrid Journal   (Followers: 15)
TrAC Trends in Analytical Chemistry     Full-text available via subscription   (Followers: 46)
Trends in Environmental Analytical Chemistry     Hybrid Journal   (Followers: 3)
Vibrational Spectroscopy     Hybrid Journal   (Followers: 11)
World Journal of Analytical Chemistry     Open Access   (Followers: 3)
Similar Journals
Journal Cover
Journal of Radioanalytical and Nuclear Chemistry
Journal Prestige (SJR): 0.47
Citation Impact (citeScore): 1
Number of Followers: 7  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1588-2780 - ISSN (Online) 0236-5731
Published by Springer-Verlag Homepage  [2537 journals]
  • Reduced deposition of 110mAg colloids by improved oxidation operation
           process during shutdown of a PWR

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      Abstract: For some pressurized water reactors, 110mAg colloids deposite on the piping surface and auxiliary systems of the primary loop during the oxidation operation process, becoming one of the most important radionuclides. The decreasing concentration of hydrogen peroxide (H2O2) during the oxidation operation process may be the cause of the deposition of 110mAg colloids. In this work, Ag colloids with particle size of 20–60 nm were first synthesized. Then the effects of reaction temperature, concentration of H2O2 and reaction time on the oxidation and removal of Ag colloids were studied. The results showed that at least 5 ppm H2O2 was needed to achieve significant oxidation and removal of Ag colloids at 80 °C. The results of this work were then applied during the shutdown of a PWR. The oxidation operation process was improved to maintain the concentration of H2O2 at 4–8 ppm during the whole process. The deposition of 110mAg colloids was then effectively mitigated, and the RCV radiation index was reduced by 28.2%. This work demonstrates the importance of H2O2 in reducing the deposition of Ag colloids during the oxidation operation process, providing a new idea and methodology to reduce shutdown dose rate of PWRs.
      PubDate: 2022-01-15
       
  • Investigation of modified orange peel in the removal of Cd2+, Co2+ and
           Zn2+ from wastewater

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      Abstract: Eco-friendly and cost-effective adsorbent material was successfully synthesized from orange peel (OP). Using H2O2, the modification of the prepared OP was carried out. SEM, XRD, EDX, TGA and FTIR analysis was conducted to characterize the modified orange peel (MOP). MOP was tested to remove (Cd2+, Co2+ and Zn2+) metal ions from wastewater. From the results, the sorption reaction kinetics follows pseudo-second-order. It also observed that the sorption process was more fitted to the Freundlich isotherm model. It was found that Qmax values were equal to (46.25, 19.21 and 7.43) mg.g–1 for Cd2+, Co2+ and Zn2+, respectively.
      PubDate: 2022-01-15
       
  • Comparison of efficiency calibration techniques of HPGe detector for
           radioactivity measurement of soil sample in Marinelli geometry

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      Abstract: To keep the accredited category for the gamma spectrometry test in our laboratory, the efficiency curves of a HPGe detector for soil sample in Marinelli geometry were determined by “efficiency transfer” principle via the ANGLE3 commercial software and Monte Carlo simulations via MCNP5 and GEANT4. The efficiency obtained from experimental measurement of point standard sources was used as a reference efficiency curve for the input of ANGLE3 software as well as for correction of simulation codes of MCNP5 and GEANT4. The results of the efficiency for soil sample in Marinelli beaker obtained from the MCNP5 and GEANT4 were compared with the efficiency obtained from the ANGLE3 software. Moreover, the trueness of the detector efficiency obtained in this work was evaluated by the radioactivity measurement of 40K, 137Cs, 232Th and 238U in an IAEA reference material.
      PubDate: 2022-01-13
       
  • Efficient adsorption of U(VI) using in low-level radioactive wastewater
           containing organic matter by amino groups modified polyacrylonitrile
           fibers

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      Abstract: A kind of amino groups modified polyacrylonitrile fibers (PAN-A) was prepared to extract uranium from organic-containing low-level radioactive wastewater (OC-LLRW). SEM/EDS and FTIR characterization conformed that amino group was triumphant grafed on polyacrylonitrile fibers (PAN) surface. Its adsorption capacity was 492.1 mg g−1 (pH 6.0) and can endure at least five adsorption/desorption cycles under condition of 0.1 mol L−1 HCl solution. This PAN-A can work efficiently in the organic containing waste water (urea, tetrahydrofurfuryl alcohol), while the polyvinylalcohol (PVA) exhibited an apparently suppressive effect. This phenomenon was mainly with respect to the sticky nature of PVA. Graphical abstract
      PubDate: 2022-01-13
       
  • Effect of moisture content on the 222Rn mass exhalation rates for
           different grain-size samples of red brick and cement mortar used in Qena
           city, Egypt

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      Abstract: Four different grain size fractions (0.2–0.5, 0.5–1, 1–1.8, 1.8–2 mm) of red brick and cement mortar samples at different moisture (0%, 5%, 10%, 15%, 20%) content relative to the sample mass were subjected to measuring their 222Rn mass exhalation rates using Alpha-Guard radon monitor, PQ 2000 PRO. The results indicated an inverse proportion between the exhalation rate and the particles size. For all studied grain size fractions, the change of the moisture content clearly affected the 222Rn mass exhalation rates. The exhalation rate reached its maximum value, which is two times higher than its value for the dry sample, by increasing the moisture content from 0 to 15% for red brick and from 0 to 5% for cement mortar, respectively. The current study results showed good agreement with those reported in the literature.
      PubDate: 2022-01-13
       
  • Effective and rapid adsorption of uranium via synergy of complexation and
           cation-π interaction

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      Abstract: A novel indole-based aerogel (HTPRA) containing carboxyl groups was prepared for separation of uranium from aqueous solution. The adsorption was rapid, strongly dependent on pH, attaining a plateau at pH 4–7.5 and independent of ionic strength. The maximum adsorption capacity of HTPRA for uranium was evaluated to be 899.9 mg g−1. HTPRA exhibited satisfactory performance in actual water samples. Furthermore, the resulting HTPRA could be recovered at least five times without marked deterioration in uptake capacity. The synergistic effect of complexation and cation-π interaction between HTPRA and uranium was responsible for the unexpected adsorption capacity of uranium.
      PubDate: 2022-01-13
       
  • Development of a compact alpha and beta camera for dismantlement
           applications

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      Abstract: A new method has been developed to image surface contamination on-site by short range radiation emitters (such as alpha or beta particle emitters). The measurement is performed in direct contact with the contaminated surface and uses a solid scintillator coupled with Silicon Photomultiplier arrays. A proof of principle is performed in laboratory using a simple prototype and multiple alpha and beta calibrated sources. The experimental setup used to acquire the data, as well as the analysis procedure, are described and the detection results and the image reconstruction are discussed with regard to dismantling requirements.
      PubDate: 2022-01-13
       
  • Passive sampling technique for atmospheric 14C measurements

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      Abstract: The present study focused on the measurement of 14C levels by using a passive sampling technique. The sampling period is optimized by exposing the 0.5 N NaOH solution to air and measuring the amount of carbon absorbed. The optimum sampling duration for measurement of 14C in the atmospheric CO2 is found as one day. The absorbed CO2 in NaOH solution was recovered by adding barium chloride, and an average recovery yield was found to be 98.67 ± 0.29%. The average specific activity of 14C for samples collected in two locations is 239.04 ± 25.45 Bq/kg C and 242.89 ± 18.22 Bq/kg C.
      PubDate: 2022-01-13
       
  • Rapid and efficient column separation of Re(VII) as a surrogate for
           Tc(VII) with benzimidazole-based cross-linked poly(ionic liquid)s

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      Abstract: In this study, the imidazole-based poly(ionic liquid)s (PILs) synthesized by one step method has been applied for the enrichment and recovery of Re(VII), a nonradioactive surrogate of Tc(VII). The anions (Cl−) in the materials could be efficiently exchanged by ReO4− and TcO4− in a rather short time. The PILs-Cl-1 and PILs-Cl-2 before and after adsorption were characterized by BET, SEM, FT-IR and XPS. The adsorption performance of Re(VII) was investigated by batch and column experiments. By contrast, PILs-Cl-2 exhibited a better adsorption performance, and the adsorption capacity reached 94.92 mg/g for ReO4−. In the recovery experiment of TcO4−, the maximum recovery rate of PILs-Cl-2 for TcO4− was 99.9%. The excellent regenerative and recyclable performance of PILs-Cl-2 was also evaluated in the column experiment, which provided an important basis for practical application in industrial field.
      PubDate: 2022-01-13
       
  • Natural and artificial radioactivity levels of greenhouse soils and
           relations with soil properties

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      Abstract: In this study, natural (226Ra, 232Th, 40K) and artificial (137Cs) radionuclide activity concentration levels of 63 greenhouse soils collected from Antalya city were determined by Gamma Spectroscopy technique using High Purity Germanium Detector. Soil analytical characteristics and total K, Ca, Mg and Na concentrations of greenhouse soils were also determined. Remarkable correlations were determined between the radioisotopes and the soil parameters. However, the dose amounts produced by the soil samples were well below the permissible levels determined by the IAEA, indicating greenhouse soils would not cause any radiological risk for the human being.
      PubDate: 2022-01-13
       
  • A facile synthesis of g-C3N4/WS2 heterojunctions with enhanced
           photocatalytic reduction activity of U(VI)

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      Abstract: Photocatalytic reduction of U(VI) is an economical and efficient method to remove U(VI) from uranium-containing wastewater, so it becomes particularly vital to find an effective photocatalyst. In this study, the g-C3N4/WS2 samples were prepared to reduce U(VI) by in-situ thermal polymerization. The g-C3N4/WS2 samples show excellent performance in the interface carriers transfer and photogenerated carriers separation. The results showed the optimal photocatalyst was CN/WS2-5 (pH = 5.0), which was 3.1 times upper than that of pure g-C3N4. Furthermore, CN/WS2-5 exhibited photoreduction stability and recyclability. Based on its facile preparation and high-efficiency reaction activity, CN/WS2-5 is excellent photocatalyst for the practical development of photocatalysis.
      PubDate: 2022-01-13
       
  • Anion- and cation-exchange studies of Zr, Hf, and Th using ion-exchange
           resin and fiber in H2SO4 media for chemical characterization of sulfate
           complex of Rf

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      Abstract: To investigate sulfate complex formation of Rf, we performed batch-wise ion-exchange experiments of its homologues Zr and Hf and its pseudo homologue Th in H2SO4 using anion- and cation-exchange resins and fibers. From the time dependence of the distribution ratios, it was found that the anion-exchange resin is applicable for the experiments with the 261Rfa. To obtain the comparison data for Rf, we investigated the distribution coefficients of Zr, Hf, and Th in 0.06–1 M H2SO4. From these results, we propose the anion-exchange experiments of Rf with the resin in 0.1–0.7 M H2SO4 using the extraction apparatus (AMBER).
      PubDate: 2022-01-13
       
  • Radiological assessment of 222Rn, 220Rn, EERC, and EETC in residential
           dwellings of district Palwal, Southern Haryana, India

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      Abstract: A systematic measurement of radon/thoron concentration by using pin-holes dosimeter and their decay products by deposition based progeny sensors have been carried out in indoor environment of district Palwal, Southern Haryana, India. LR-115 type-II of cellulose nitrate with thick polyester base film was used as detectors. A total 150 locations were selected for measurements over a period of 40 days. In this paper, results of winter season are reported and compared with results of summer and rainy season. The measured average indoor thoron gas concentration (34.6 ± 1.5) is about 3.5 times higher than the world average value (10 Bq m−3). The average values for radon concentration, EERC, and EETC is found below the world average values of 40 Bq m−3 for radon, 15 Bq m−3 for EERC, and 0.5 Bq m−3 for EETC. The average annual effective dose inhaled by humans was estimated and compared with recommended limits of ICRP and WHO.
      PubDate: 2022-01-13
       
  • Effect of soil’s porosity and moisture content on radon and thoron
           exhalation rates

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      Abstract: We study the variation of radon mass exhalation rate (Jm) and thoron surface exhalation rate (Js) with soil’s porosity and moisture content using a scintillation based monitor-Smart RnDuo. Assessment were carried out in around 40 soil samples collected from four villages of East Khasi Hills district, Meghalaya, India. Results revealed that, both Jm and Js shows no convincing trend of variation with porosity, while with respect to moisture content, a sporadic increase is observed in the values of Jm and Js up to certain level, beyond which a decreasing trend is observed; accountable reasons are discussed in the manuscript.
      PubDate: 2022-01-13
       
  • Matrix effects in plutonium isotope ratio measurements using thermal
           ionization mass spectrometry

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      Abstract: Through high fidelity measurements of four different plutonium certified reference material standards from New Brunswick Laboratory, the mass fractionation correction factor for the 240Pu/239Pu major isotope ratio measurements by the total evaporation methodology using thermal ionization mass spectrometer instruments is shown to depend on the elapsed time since separation of the decay products from the analyzed plutonium fraction. Systematic biases arising from this matrix dependence of the mass fractionation correction factor are larger than the precision obtained in routine TE measurements of the 240Pu/239Pu major isotope ratio using thermal ionization mass spectrometry regarded as the gold standard for these measurements. LA-UR-21–21,941.
      PubDate: 2022-01-13
       
  • Determining rare-earth elements in aqueous solutions using PGNAA
           technology

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      Abstract: A PGNAA set-up consisting of a 241Am-Be neutron source and a HPGe detector was proposed to determine rare-earth elements in leachate during infiltration process, and was conducted to analyze samples containing gadolinium, samarium, and neodymium. A good agreement between the experimental net peak areas and the MCNP simulated ones was observed. The net peak areas of gadolinium, samarium, and neodymium versus their corresponding masses were then analyzed. The results showed linear dependences after neutron self-shielding correction, and the minimum detectable concentrations were 27.94 mg/L (Gd), 4.77 mg /L (Sm) and 1077 mg/L (Nd), respectively.
      PubDate: 2022-01-13
       
  • Preclinical evaluation of 188 Re-HYNIC-PSMA as a novel therapeutic agent

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      Abstract: In this study, optimized preparation, quality control, cell assessments and biostribution of 188Re-HYNIC-PSMA in normal rats and tumor bearing mice are studied. Optimized conditions for radiolabeling were evaluated and radiochemical purity (> 99%) was investigated using ITLC and HPLC methods. 188Re-HYNIC-PSMA was stable both in PBS (4 °C) and in human serum (37 °C) even after 48 h. The results showed the complex was cleared from the blood very fast via urinary track. This new radiolabeled compound has a high potential to be considered as an agent for the treatment of patients with PSMA expressing tumors however more biological studies are still needed.
      PubDate: 2022-01-13
       
  • Sorption of Pu(IV) on biogenic Mn oxide and complexation of Pu(IV) with
           organic ligands secreted by fungal cells

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      Abstract: We investigated the sorption of Pu(IV) on biogenic Mn oxide, composed of Mn(IV) oxide and hyphae, produced by Mn(II)-oxidizing fungus. The sorption of Pu(IV) on biogenic Mn oxide was similar to that of U(VI) and different from that of Th(IV), possibly due to oxidation of Pu(IV) to Pu(VI). When Pu(IV) was sorbed on hyphae only, it was desorbed into the solution phase over time. Pu(IV) could be solubilized by complexation with organic ligands secreted by fungal cells. Furthermore, Pu(IV) desorption was observed especially under circumneutral pH conditions, indicating that Pu(IV) can be solubilized by microbial activity in most surface environments.
      PubDate: 2022-01-13
       
  • Research on the luggage detection system for hidden explosive
           identification based on PGNAA technology

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      Abstract: To address hidden explosive identification in luggage, a luggage detection system was designed based on PGNAA technology in this study. A multidetector structure was designed, and hardware modules were optimized based on a Signal-to-Noise-Ratio optimization method. Furthermore, a Weighted Spectra Library (WSL) method was proposed for spectral analysis. Combining the optimized device with the WSL method, the feasibility of the device for explosive detection was assessed both in MCNP simulation and by experimental measurement. Finally, the measurement performance of the device was further investigated, the minimum detectable mass of explosive was 200 g, and the minimum detection time was 60 s at 1000 g explosive based on the present system.
      PubDate: 2022-01-13
       
  • Assessment of natural radioactivity levels in the Lesser Himalayas of the
           Jammu and Kashmir, India

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      Abstract: In the present study, the activity concentration of radioactive nuclides (226Ra, 232Th and 40K) in different types of rocks in the lesser Himalayan mountainous region in Jammu and Kashmir, India have been measured using Sodium Iodide and High purity germanium detectors. The advanced smart RnDuo monitor was utilized for assessing radon and thoron exhalation rates and the results vary from 14.82 to 37.85 mBqkg−1 h−1 and 124–372 mBqm−2 s−1 respectively. The radium equivalent activities of the studied samples have been calculated to assess the radiation hazards arising due to the use of these rocks in the construction of dwellings. All the rock samples have radium equivalent activities lower than the limit set in the OECD report (370 Bq Kg−1).
      PubDate: 2022-01-13
       
 
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