搜索结果: 1-14 共查到“理学 Preconcentration”相关记录14条 . 查询时间(0.093 秒)
Evaluation of solid-phase extraction sorbent with ketoimine groups for the preconcentration of benzene and phenolic compounds in water
Modified silica solid-phase extraction SPE
2010/10/18
The applicability of silica gel, modified with ketoimine groups, to solid phase extraction (SPE) was tested. Basic characteristics of the modified silica were determined using elemental analysis, and ...
Chelating agent free solid phase extraction (CAF-SPE) method for separation and/or preconcentration of iron(III) ions
Iron determination solid phase extraction preconcentration
2010/10/15
This paper presents a chelating agent free solid phase extraction (CAF-SPE) method for the separation and/or preconcentration of trace iron(III) ions. This method is based on the sorption of Fe(III) i...
Flame Atomic Absorption Spectrometric Determination of Palladium in Aqueous Samples after Preconcentration Using Nanoparticles of γ-Alumina Functionalized with Pyridine Groups
Flame Atomic Absorption Spectrometric Palladium Aqueous Samples Preconcentration Nanoparticles of γ-Alumina Functionalized Pyridine Groups
2010/9/20
A new solid phase, nanoparticles of alumina functionalized with pyridine groups, was synthesized and used for extraction and preconcentartion of palladium(II) ions from some water samples. The effects...
New preconcentration technique of Zr, Nb, Mo, Hf, Ta and W employing coprecipitation with Ti compounds: Its application to Lu-Hf system and sequential Pb-Sr-Nd-Sm separation
coprecipitation Ti compounds Lu-Hf Pb-Sr-Nd isotope analysis preconcentration
2017/8/10
A new preconcentration technique of Zr, Nb, Mo, Hf, Ta and W has been invented employing coprecipiation with Ti compounds. Silicate samples were digested by HF with addition of Ti. Subsequent drying w...
Preconcentration of Trace Elements on Amberlite XAD-4 Resin Functionalised with 1,2-bis (o-aminophenylthio) Ethane and Their Determination by FAAS in Environmental Samples
Water trace element preconcentration Amberlite XAD-4 FAAS 1 2-bis (o-aminophenylthio) ethane chelating resin
2010/4/8
The use of chemically modified XAD-4-1,2-bis (o-aminophenylthio) ethane chelating resin for preconcentrating Cr6+, Mn2+, Fe3+, Co2+, Cu2+, Cd2+, Zn2+, Pb2+, and Ni2+ was studied using flame atomic abs...
Preconcentration and Determination of Trace Amounts of Heavy Metals in Water Samples Using Membrane Disk and Flame Atomic Absorption Spectrometry
preconcentration atomic absorption spectrometry
2007/12/20
摘要 A fast and simple method for preconcentration of Ni2＋, Cd2＋, Pb2＋, Zn2＋, Cu2＋ and Co2＋ from natural water samples was developed. The metal ions were complexed with sodium diethyldithiocarbamate (Na...
Determination of Pb(II) and Cu(II) by Electrothermal Atomic Absorption Spectrometry after Preconcentration by a Schiff Base Adsorbed on Surfactant Coated Alumina
determination of lead and copper preconcentration
2007/12/20
摘要 1,2-Bis(salicylidenamino)ethane loaded onto sodium dodecyl sulfate-coated alumina was used as a new chelating sorbent for the preconcentration of traces of Pb(II) and Cu(II) prior to atomic absorpt...
Determination of Copper by Flame Atomic Absorption Spectrometry after Preconcentration with Activated Carbon Impregnated with a New Schiff Base
preconcentration determination copper
2007/12/20
摘要 A simple and reliable method for theextraction and determination of trace amounts of copper(II) ions using activatedcarbon (AC) impregnated by a new Schiff base 5-[(4-heptyloxyphenyl)azo]-N-(4-prop...
On-Line Preconcentration and Speciation of Chromium by an 8-Hydroxyquinoline Microcolumn Immobilized on Surfactant-Coated Alumina and Flow Injection Atomic Absorption Spectrometry
Chromium speciation on-line preconcentration 8-hydroxyquinoline alumina flow injection
2010/4/19
An on-line technique for the determination of chromium species with atomic absorption spectrometry is described. The method is based on separation and preconcentration of Cr(III) on a microcolumn of i...
Determination of Trace Copper by FAAS after Solid Phase Extraction and Preconcentration onto Amberlite XAD-2 Loaded with Nitroso-R Salt
Amberlite XAD-2 flame atomic absorption spectrometry solid phase extraction of copper standard alloys and biological samples
2010/4/20
A procedure for the separation and preconcentration of trace amounts of copper is proposed. It is based on the adsorption of copper(II) ions solution onto a column of Amberlite XAD-2 resin loaded with...
Flame Atomic Absorption Spectrometric Determination of Manganese in Alloys after Preconcentration onto Amberlite XAD-4 Loaded with Saccharomyces carlsbergensis
Manganese preconcentration flame atomic absorption spectrometry alloy Saccharomyces carlsbergensis
2010/4/21
A sensitive and simple enrichment method using microorganisms as an adsorbent is described for the determination of trace manganese in alloys. Manganese was determined by flame atomic absorption spect...
Sorption Preconcentration and Determination of Molybdenum(VI) by Diffuse Reflection Spectroscopy
Sorption Preconcentration Molybdenum(VI) Pyrocatechol violet Aqueous solutions
2010/4/21
The present work focuses on the preconcentration of molybdenum and its determination in aqueous solutions by means of diffuse reflection spectroscopy. The preconcentration of Mo(VI) was carried out us...
Differential Pulse Polarographic Determination of Cadmium After Solid Liquid Extraction and Preconcentration Using PAN
Trace cadmium determination differential pulse polarography 1-(2-pyridylazo)-2-naphthol
2010/4/21
A highly selective, sensitive, rapid and economical differential pulse polarographic method has been developed for the determination of trace amounts of cadmium in various samples after the adsorption...
Column Preconcentration/Separation and Atomic Absorption Spectrometric Determinations of Some Heavy Metals in Table Salt Samples Using Amberlite XAD-1180
Determination Preconcentration Table Salt Samples AAS Amberlite XAD-1180
2010/4/21
A simple and sensitive solid phase extraction procedure on Amberlite XAD-1180 resin is presented for the determination of chromium, cobalt, manganese and nickel at trace levels by atomic absorption sp...