scholarly journals Separation of 44Sc from Natural Calcium Carbonate Targets for Synthesis of 44Sc-DOTATATE

Molecules ◽  
2018 ◽  
Vol 23 (7) ◽  
pp. 1787 ◽  
Author(s):  
Krzysztof Kilian ◽  
Łukasz Cheda ◽  
Mateusz Sitarz ◽  
Katarzyna Szkliniarz ◽  
Jarosław Choiński ◽  
...  
Keyword(s):  
Calcium Concentration ◽  
Small Volume ◽  
Isotope Separation ◽  
Efficient Production ◽  
Icp Oes ◽  
Wide Range ◽  
Separation And Preconcentration ◽  
Metallic Impurities ◽  
Automatic Systems

The rapid increase in applications of scandium isotopes in nuclear medicine requires new efficient production routes for these radioisotopes. Recently, irradiations of calcium in cyclotrons by α, deuteron, and proton beams have been used. Therefore, effective post-irradiation separation and preconcentration of the radioactive scandium from the calcium matrix are important to obtain the pure final product in a relatively small volume. Nobias resin was used as a sorbent for effective separation of 44Sc from calcium targets. Separation was performed at pH 3 using a column containing 10 mg of resin. Scandium was eluted with 100 μL of 2 mol L−1 HCl. Particular attention was paid to the reduction of calcium concentration, presence of metallic impurities, robustness and simple automation. 44Sc was separated with 94.9 ± 2.8% yield, with results in the range of 91.7–99.0%. Purity of the eluate was confirmed with ICP-OES determination of metallic impurities and >99% chelation efficiency with DOTATATE, followed by >36 h radiochemical stability of the complex. A wide range of optimal conditions and robustness to target variability and suspended matter facilitates the proposed method in automatic systems for scandium isotope separation and synthesis of scandium-labeled radiopharmaceuticals.

An on-line matrix separation and preconcentration procedure for ICP-OES determination of Cd, Co, Cu, Mn and Pb traces in Zr and Zr-Nb alloys using a cation-exchange resin microcolumn

2021 ◽  
Author(s):  
Masoud Aghahoseini ◽  
Gholamhassan Azimi ◽  
M. K. Amini
Keyword(s):  
Inductively Coupled Plasma ◽  
Cation Exchange Resin ◽  
Optical Emission ◽  
Emission Spectrometry ◽  
Icp Oes ◽  
Inductively Coupled ◽  
Separation And Preconcentration ◽  
On Line ◽  
Plasma Optical Emission Spectrometry

Determination of traces of Cd, Co, Cu, Mn and Pb elements in zirconium and its alloys by inductively coupled plasma optical emission spectrometry (ICP OES) suffers from severe spectral interferences...

Determination of Fungicides in Fruit Juice by Ultrasound-Assisted Dispersive Liquid–Liquid Microextraction Based on Solidification of Floating Organic Solvent Droplets Followed by High Performance Liquid Chromatography

2014 ◽  
Vol 97 (1) ◽  
pp. 183-187 ◽  
Author(s):  
Run-Zhen Fan ◽  
Congyun Liu ◽  
Wenqing Jiang ◽  
Xiaonan Wang ◽  
Fengmao Liu
Keyword(s):  
Organic Solvent ◽  
High Performance ◽  
Fruit Juice ◽  
Enrichment Factors ◽  
Wide Range ◽  
Separation And Preconcentration ◽  
Ultrasound Assisted ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

Abstract Ultrasound-assisted dispersive liquid–liquid microextraction (UA-DLLME) based on solidification of the floating organic solvent droplets (SFO) combined with HPLC was used for determination of five fungicides in fruit juice samples. 1-Dodecanol, which has a low density and low toxicity, was used as the extraction solvent in UA-DLLME. The solidification of floating organic dropletsfacilitates the transfer of analytes from the aqueous phase to the organic phase. This method was easy, quick, inexpensive, precise, and linear over a wide range. Under the optimized conditions, the enrichment factors for a 5 mL fruit juice sample were 25 to 56, and the LODs for the five fungicides ranged from 5 to 50 μg/L. The average recoveries ranged from 71.8 to 118.2% with RSDsof 0.9 to 13.9%. Application of the DLLME-SFO technique allows successful separation and preconcentration of the fungicides at a low concentration level in fruit juice samples.

Determination of traces of palladium in stream sediment and auto catalyst by FI-ICP-OES using on-line separation and preconcentration with QuadraSil TA

Talanta ◽  
2009 ◽  
Vol 79 (4) ◽  
pp. 1050-1054 ◽  
Author(s):  
Junichi Nakajima ◽  
Masashi Ohno ◽  
Katsumi Chikama ◽  
Tatsuya Seki ◽  
Koichi Oguma
Keyword(s):  
Stream Sediment ◽  
Icp Oes ◽  
Separation And Preconcentration ◽  
On Line ◽  
Line Separation

Simplified Method for the Estimation of Inorganic Phosphorus in Body Fluids

1966 ◽  
Vol 12 (12) ◽  
pp. 871-882 ◽  
Author(s):  
Harry Goldenberg ◽  
Alberto Fernandez
Keyword(s):  
Small Volume ◽  
Inorganic Phosphorus ◽  
Body Fluids ◽  
Ferrous Ion ◽  
Blue Color ◽  
Wide Range ◽  
Minimum Number ◽  
Simplified Procedure

Abstract A simplified procedure is described for the determination of inorganic phosphate in body fluids. The method employs two stable reagents and requires a minimum number of steps. Serum is deproteinized with trichloroacetic acid containing ferrous ion and thiourea. The supernatant is decanted and mixed with a small volume of molybdic acid. The phosphomolybdate formed is immediately reduced in situ by the ferrous ion to produce a blue color that is stable for several hours. The intensity of color is insensitive to changes in concentration of acid, molybdate, ferrous ion, and thiourea, and to losses in decanting the serum supernatant. Excellent conformity to Beer's law is demonstrated over a wide range of phosphorus concentrations. Recoveries of phosphorus added to serum and urine are shown to be quantitative. A comparison is presented between this method and that of Fiske and SubbaRow (1).

scholarly journals ICP-OES Determination of Trace Metal Ions after Preconcentration Using Silica Gel Modified with 1,2-Dihydroxyanthraquinone

2012 ◽  
Vol 9 (2) ◽  
pp. 1007-1016 ◽  
Author(s):  
Reem M. Alghanmi
Keyword(s):  
Trace Metal ◽  
Metal Ions ◽  
Silica Gel ◽  
Inductively Coupled Plasma ◽  
Emission Spectrometry ◽  
Icp Oes ◽  
Trace Metal Ions ◽  
Relative Standard ◽  
Separation And Preconcentration

A new chelating matrix was prepared by immobilizing 1,2-dihydr-oxyanthraquinone, or alizarin (AZ), on silica gel modified with (3-aminopropyl)trimethoxysilane. The matrix was characterized by FTIR spectroscopy and elemental analysis. The new matrix was used to preconcentrate Cd(II), Cu(II), Ni(II), Pb(II) and Zn(II) prior to their determination by inductively coupled plasma optical emission spectrometry (ICP-OES). The optimum pH was 5 and the optimum extraction time was approximately 15 minutes using the batch method. Common electrolytes and metal ions did not interfere with the separation and determination of the analytes. The adsorption capacity of the new sorbent was 67.4, 163.5, 212.8, 76.4 and 180.3 μmol/g for Cd(II), Cu(II), Ni(II), Pb(II) and Zn(II), respectively. The relative standard deviations (RSD) were less than 3.0%. This method allowed for successful separation and preconcentration of trace metal ions in different water samples with satisfactory results.

scholarly journals Separation and preconcentration followed by ICP-OES and ICP-MS determination of precious metals using silica gel chemically modified with dithiocarbamate groups

2019 ◽  
Vol 55 (15) ◽  
pp. 2659-2669 ◽  
Author(s):  
Vladimir N. Losev ◽  
Victoriya V. Parfenova ◽  
Evgeney V. Elsuf’ev ◽  
Elena V. Borodina ◽  
Segey I. Metelitsa ◽  
...  
Keyword(s):  
Silica Gel ◽  
Precious Metals ◽  
Icp Oes ◽  
Chemically Modified ◽  
Icp Ms ◽  
Separation And Preconcentration

Application of furnace atomic non-thermal excitation spectrometry for the determination of non-metals

1990 ◽  
Vol 333 (1628) ◽  
pp. 171-172
Keyword(s):  
Atomic Spectrometry ◽  
Clinical Samples ◽  
Thermal Excitation ◽  
Metal Elements ◽  
Elemental Concentrations ◽  
Wide Range ◽  
Metallic Impurities

Various atomic spectrometry techniques are used for the determination of elemental concentrations in a wide range of samples. Although procedures for the determination of metallic impurities are well established, the development of successful methods for the measurement of non-metal elements at trace levels has proved more difficult. In particular, better methods are required for the determination of B, Cl, P, S, Si, etc., in industrial and clinical samples.

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