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Atomic spectrometry
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Ebook "Russian contributions to analytical chemistry" offers a unique perspective and novel information on the significant contributions of Russian scientists to analytical chemistry and chemical analysis. Written by the Editor-in-Chief of the Journal of Analytical Chemistry, it discusses various examples of new methods and approaches originating in Russia, such as chromatography, electrothermal atomic absorption spectrometry, Kumakhov X-ray optics, the Spolský effect in fluorescent analysis and important innovations in mass spectrometry, which are already widely used.
165p
tracanhphuonghoa1007
22-04-2024
7
3
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Part 1 book "Chemistry" by author Catherine E. Housecroft includes content: Some basic concepts, thermochemistry; atoms and atomic structure; homonuclear covalent bonds, heteronuclear diatomic molecules, polyatomic molecules - shapes, polyatomic molecules - bonding, ions, elements, mass spectrometry, introduction to spectroscopy, vibrational and rotational spectroscopies; electronic spectroscopy, NMR spectroscopy, reaction kinetics.
571p
muasambanhan10
06-04-2024
6
0
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Ebook "Polymers on the crime scene: Forensic analysis of polymeric trace evidence" approaches the analysis of forensic contact traces from a polymer science perspective. The development of characterization methods of new or unusual traces and the improvement of existing protocols is described. The book starts with a general introduction to polymers and the issues related to transfer, persistence and recovery of polymeric traces.
364p
tudohanhtau1006
29-03-2024
1
1
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Ebook "Insights into the adsorption behavior of a prototype functional molecule: A scanning tunneling microscopy study" main research interests are (1) the development of new materials with novel electronic, geometric and chemical properties, (2) the investigation of elementary steps of surface reactions and (3) the development and construction of advanced scientific apparatus. The investigations aim at a fundamental physical and chemical understanding of all mechanisms and processes involved, at an atomic level, and at the identification and evaluation of new preparation routes.
97p
tudohanhtau1006
29-03-2024
2
1
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Ebook Basic principles of forensic chemistry: Part 1 Mô tả gốc: (BQ) Part 1 includes content: Introduction, atomic structure, molecules, organic chemistry, forensic language, forensic documentation, chemical screening, microcrystal techniques, chemical extractions and sample preparation, chromatography and mass spectrometry,… and other contents. Invite you to consult the details.
165p
longtimenosee03
01-02-2024
4
0
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The present study investigates the total arsenic (As) content in the samples of drinking water in the Republic of Macedonia, which is obtained from different water sources, such as: springs, surface accumulations, underground accumulations and drilled wells.
10p
viisac
23-09-2023
6
1
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Rocks contain a large number of elements such as Na, K, Ca, Mg, Fe, Mn, and Ti. The determination of those element contents is important in geological and geographical exploration as well as the original identification and classification of rocks. In the present study, we analyzed rock samples after being treated by microwave using flame atomic and molecular absorption spectroscopy.
8p
vicedric
08-02-2023
4
1
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A hybrid Zr/amine-modified mesoporous silica sorbent (SBA/TMPED/Zr-0.5) was proposed to preconcentrate traces of inorganic As from drinking water before its flow injection hydride generation atomic absorption spectrometry (FI HG AAS) determination.
8p
vironald
15-12-2022
6
2
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The purpose of the study was the comprehensive comparative phytochemical characterization of fifteen different accessions of jojoba oil using Spectrophotometer, Atomic Absorption Spectroscopy (AAS) and Gas Chromatography – Mass Spectrometry (GC–MS).
9p
schindler
30-12-2021
13
0
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The ultrasound-assisted emulsification–solidified floating organic drop microextraction (USAE–SFODME) methodology was combined with flow injection–lame atomic absorption spectrometry (FI–FAAS) for the separation/preconcentration and determination of palladium at ultratrace level. In this method, the palladium ion in the aqueous solution was complexed with acetylacetone (6 × 10−3 mol L−1) in the pH range of 1–7 and was extracted into 40 µL of 1-undecanol, which was sonically dispersed in the aqueous phase.
10p
langthannam
29-12-2021
10
0
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A microextraction procedure was established for the speciation of total Cr, Cr(III), and Cr(VI). Sudan blue II was used as a ligand for speciation works. Some factors affecting the recoveries of chromium species, including type of extraction and dispersive solvents, pH, ligand amount, extraction time, and matrix ions, were examined. Optimum values for the dispersive liquid–liquid microextraction method were pH 6, LOD 0.34 µg L−1 , and preconcentration factor 400.
9p
langthannam
29-12-2021
12
0
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2-Acetylpyridine-4-phenyl-3-thiosemicarbazone (APPT) ligand was incorporated onto Amberlite XAD-2 resin through an azo spacer and characterized by FTIR spectroscopy, elemental analysis, TGA, and SEM analysis. The synthesized resin was used for the preconcentration of Pb(II), Zn(II), Co(II), Ni(II), Cu(II), and Cd(II) ions. The sorbed metal ions were eluted with 10 mL of 2.0 mol L−1 HCl and determined by microsample injection coupled flame atomic spectrometry (MIS-FAAS).
15p
langthannam
29-12-2021
5
0
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A rhodamine B derivative containing 1,2,4-triazole as subunit was characterized as an “off–on” type Cu2+ - selective fluorescent probe. It exhibited high selectivity and sensitivity for Cu2+ in ethanol–water solution (9:1, v:v, pH 7.0, 20 mM HEPES) and underwent ring opening. A prominent fluorescence enhancement at 570 nm was observed in the presence of Cu2+ with the change in the absorption spectrum, and a 1:1 metal–ligand complex was formed.
7p
langthannam
29-12-2021
10
0
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The synthesis and characterization of ethylenediaminetetraacetic acid immobilized activated carbon cloth was performed in the present work. It was used for preconcentration-separation of lead(II), cobalt(II), and nickel(II) at trace levels as an adsorbent. Factors including pH, concentration and volume of eluent, sample and eluent flow rates, sample volume, and effect of coexisting ions on the solid phase extraction of analytes were examined. The preconcentration factor was 50.
12p
langthannam
29-12-2021
14
0
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The metal complexes are retained on resin at pH 6.0 and eluted with 1.0 mol L −1 HCl in acetone in both methods. After the optimum conditions were determined, the methods were applied to seawater, stream water, rice, lentil, tea, tobacco, bulgur, chickpea, wheat, red pepper, black pepper, peppermint, and dried eggplant samples in order to determine the levels of copper and cadmium.
13p
langthannam
29-12-2021
8
0
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Eosin-Y exhibits high affinity and emission based spectral response to most of the major ions in water samples. In the present study we performed selective spectrofluorimetric analysis of manganese with eosin-Y in the presence of potential interferents. We employed green chemistry reagents, ionic liquids (ILs) and two different micelles, to suppress the effect of conventional cations and anions on the response of eosin-Y. The experimental data revealed that different test moieties caused enhanced analytical response to Mn2+.
12p
langthannam
29-12-2021
16
0
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The speciation and preconcentration of selenium were carried out by solid phase extraction using nanozirconium oxide/boron oxide (ZrO2/B2O3). Electrothermal atomic absorption spectrometry (ETAAS) was used for detection. This preconcentration and/or speciation method depends on the retention of Se(IV) ions selectively as its ammonium pyrrolidine dithiocarbamate (APDC) complex on the sorbent. The effects of pH, flow rate, and volume of sample solution and eluent type were investigated for determining the optimum preconcentration and speciation conditions.
12p
langthannam
29-12-2021
11
0
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A new chromium(III) ion-imprinted polymer (IIP) was prepared from a Cr(III)-nicotinate complex (template), acrylamide (functional monomer), and ethylene glycol dimethacrylate (cross-linking agent) using 2,2’-azobisisobutyronitrile as the radical initiator. IIP was characterised and used as a selective sorbent for the solid-phase extraction of Cr(III) ions. The conditions for dynamic separation of Cr(III) on IIP were optimised.
11p
langthannam
29-12-2021
18
0
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A fast, simple, and reliable method for determination of hexavalent chromium species in soil aqueous and alkaline extracts has been developed. The procedure is based on the ion-pair extraction of Cr(VI) with methyltrioctylammonium chloride (Aliquat 336) into xylene. The extract is analyzed by flame (FAAS) or electrothermal atomic absorption spectrometry (ETAAS).
9p
langthannam
29-12-2021
10
0
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A novel preconcentration method for Pb and Zn ions using a column packed with Schiff base modified silica gel is described. The method was based on the sorption of analytes on N,N’-bis(4-methoxysalicylidene)-1,3-propanediamine modified silica gel and elution with HNO3 prior to flame atomic absorption analysis. The parameters pH, flow rate, sample volume, eluent volume, and concentration were optimized using a central composite design.
12p
langthannam
29-12-2021
10
0
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