搜索结果: 1-15 共查到“化学 Trace”相关记录26条 . 查询时间(0.098 秒)
Determination of trace element contents of Thymus species from Turkey
Thymus species trace elements minerals
2010/12/29
Eleven mineral and trace elements (Mg, Ca, K, Fe, Mn, Al, Zn, Cu, Cd, Ni, and Pb) were determined in the Thymus species growing in Turkey. The total concentrations were measured in samples mineralized...
Determination of trace element contents of Thymus species from Turkey
Thymus species trace elements minerals atomic absorption spectrometry microwave digestion
2010/12/20
Eleven mineral and trace elements (Mg, Ca, K, Fe, Mn, Al, Zn, Cu, Cd, Ni, and Pb) were determined in the Thymus species growing in Turkey. The total concentrations were measured in samples mineralized...
Modification of a Porous Sheet (MAPS) for the High-Performance Solid-Phase Extraction of Trace and Ultratrace Elements by Radiation-Induced Graft Polymerization
Modification Porous Sheet High-Performance Solid-Phase Extraction Trace Ultratrace Elements Radiation-Induced Graft Polymerization
2010/9/13
In this review, the preparation of a novel porous sheet designed for solid-phase extraction (SPE) and a comparison of the preconcentration performance of metal ions with conventional sorbents are des...
Trace Analysis of Polycyclic Aromatic Hydrocarbons Using Gas Chromatography–Mass Spectrometry Based on Nanosecond Multiphoton Ionization
Trace Analysis Polycyclic Aromatic Hydrocarbons Gas Chromatography–Mass Spectrometry Based Nanosecond Multiphoton Ionization
2010/9/15
Gas chromatography/resonance-enhanced multiphoton ionization/time-of-flight mass spectrometry (GC/REMPI-TOFMS) using an ultraviolet nanosecond laser was employed in the trace analysis of polycyclic ar...
Spectrophotometric Determination of Trace Phosphate Ions by Amplitude-Modulated Flow Analysis Coupled with Malachite Green Method
Spectrophotometric Determination Trace Phosphate Ions
2010/9/14
An amplitude-modulated flow analysis coupled with lock-in detection is proposed for the determination of trace phosphate. The flow rate FS of sample solution is varied in response to a periodic signal...
Interference elimination studies during the determination of trace elements in cow liver using differential pulse polarography
Liver trace elements determination polarographic
2010/10/14
The liver is known to accumulate many trace elements; thus it is very important to determine their level in a sensitive way. The objective of this study was to develop a simple method for the simultan...
Flame Atomic Absorption Spectrometry Determination of Trace Amounts of Nickel Ions in Water Samples after Ligandless Ultrasound-assisted Emulsification Microextraction
Flame Atomic Absorption Spectrometry Determination Trace Amounts Nickel Ions
2010/9/17
In the present work, a new ligandless-ultrasound-assisted emulsification microextraction (LL-USAEME) method was developed for preconcentration trace amounts of nickel as a prior step to its determinat...
Kinetic Spectrophotometric Determination of Trace Amounts of Iodide in Food Samples
Kinetic Spectrophotometric Determination Trace Amounts Iodide Food Samples
2010/9/20
A simple, selective and sensitive kinetic method has been developed for the determination of trace amounts of iodide. This method is based on a catalytic effect of iodide on the reaction between Janu...
Determination of trace borohydride in basic solutions using differential pulse polarography
Trace borohydride etermination ifferential pulse polarography opper interference
2010/4/8
Synthesis of borohydride is important because of its use as a hydrogen energy source. The objective of this study was to develop a new and simple method for the trace determination of borohydride so t...
Trace Determination of Linear Alkylbenzene Sulfonates：Application in Artificially Polluted Soil—Carrots System
Linear Alkylbenzene Sulfonates anionic surfactants Soil—Carrots System
2009/9/4
Surfactants are widely used in household and industrial products. The risk of incorporation of linear alkylbenzene sulfonates (LAS) from biosolids, wastewater, and fertilizers land application to the ...
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 Trace Amounts of Vanadium by Kinetic-Catalytic Spectrophotometric Methods
kinetic-catalytic method SPADNS methylthymol blue vanadium
2007/12/19
摘要 Kinetic-catalytic spectrophotometric methods were proposed for the determination of trace amounts of vanadium element as vanadium(IV) and/or V(V) ions. The vanadium(IV) as VO2＋ ion and/or vanadium(...
Determination of Some Trace Metals in Environmental Samples by Flame AAS Following Solid Phase Extraction with Amberlite XAD-2000 Resin after Complexing with 8-Hydroxyquinoline
water and vegetable sample trace metal preconcentration amberlite XAD-2000 FAAS 8-hydroxyquinoline
2007/12/19
摘要 A procedure for preconcentration of Mn(II), Fe(II), Co(II), Cu(II), Cd(II), Zn(II), Pb(II) and Ni(II) based on retention of their complexes with 8-hydroxyquinoline (HQ) on Amberlite XAD-2000 resin ...
On-Line Coupling of In-Tube Solid Phase Microextraction to Capillary Gas Chromatography for Trace Analysis of Aqueous Samples
in-tube microextraction solid phase microextraction on-line extraction sample pretreatment capillary gas chromatography
2007/12/13
On-Line Coupling of In-Tube Solid Phase Microextraction to Capillary Gas Chromatography for Trace Analysis of Aqueous Samples。