搜索结果: 136-150 共查到“化学 determination”相关记录213条 . 查询时间(0.182 秒)
Study on the Solid Phase Extraction and Spectrophotometric Determination of Cobalt with 2-(2-Quinolylazo)-5-Diethylaminoaniline
2-(2-quinolylazo)-5-diethylaminoaniline cobalt spectrophotometry solid phase extraction
2010/4/20
A sensitive, selective and rapid method for the determination of cobalt based on the rapid reaction of cobalt(II) with QADEAA and the solid phase extraction of the Co(II)-QADEAA chelate with C18 membr...
Rapid Complexometric Determination of Mercury(II) Using Glutathione as a Selective Demasking Reagent
Complexometry Demasking reagent EDTA titration Glutathione Mercury determination
2010/4/20
A simple, rapid and selective complexometric method is proposed for the determination of mercury(II) in the presence of associated metal ions. Mercury(II) is first complexed with an excess of EDTA and...
Genetic Multivariate Calibration Methods for Near Infrared (NIR) Spectroscopic Determination of Complex Mixtures
Near infrared spectroscopy Multivariate calibration Genetic algorithms Genetic Regression Partial Least Squares Classical Least Squares Inverse Least Squares
2010/4/20
The simultaneous determination of ternary mixtures of methylene chloride, ethyl acetate, and methanol using near infrared (NIR) spectroscopy and 4 different genetic algorithms based multivariate calib...
Electrocatalytic Determination of Ascorbic Acid Using Glassy Carbon Modified with Nickel(II) Macrocycle Containing Dianionic Tetraazaannulene Ligand
Ni(II) tetraaza macrocycle Sensor Electrocatalytic oxidation L-Ascorbic acid
2010/4/20
A symmetric Ni(II) tetraaza macrocycle modified glassy electrode shows electrocatalytic activity for the oxidation of L-ascorbic acid at pH 7. It was shown the peak potential shifted to the negative b...
Determination of Selenium(IV) Using o-Phenylenediamine by Differential Pulse Polarography/Interference of Metal Ions
Selenium determination o-phenylenediamine Interference's problem Polarography
2010/4/20
A new sensitive and selective pulse polarographic method for the determination of Se(IV) next to interfering ions is described. This method is based on the highly sensitive peak formed by the reactio...
Anodic Stripping Voltammetric Determination of Gold on a Polyvinylferrocene Coated Glassy Carbon Electrode
Polyvinylferrocene modified electrode gold determination anodic stripping voltammetry tetrahalo complexes of gold
2010/4/20
The anodic stripping voltammetric determination of gold was accomplished on a chemically modified glassy carbon electrode in a solution containing chloride ions. A modifying polymer, polyvinylferrocen...
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...
Determination of Fluoride in Various Samples and Some Infusions Using a Fluoride Selective Electrode
Fluoride Water Infusion Tea Toothpaste Fluoride ion-selective electrode
2010/4/21
The determination of fluoride in some environmental samples was performed using a fluoride ion-selective electrode. Fluoride concentrations were determined in drinking waters (from different provinces...
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...
Determination of Trace Amounts of Iodide by an Inhibition Kinetic Spectrophotometric Method
Co(III)-EDTA inhibition kinetic iodide initial rate method and spectrophotometry
2010/4/21
Determination of Trace Amounts of Iodide by an Inhibition Kinetic Spectrophotometric Method.
Potential of liquid chromatography–atmospheric pressure chemical ionisation tandem mass spectrometry for determination of fosetyl-aluminium residues in dried hops
fosetyl-aluminium pesticide residues hops analysis liquid chromatography mass spectrometry
2014/3/19
New analytical procedure for the determination of fosetyl-aluminium in hop cones (also called “hops”) was developed. Liquid chromatography–atmospheric pressure chemical ionisation tandem mass spectrom...
Determination of free and bound 3-chloropropane-1,2-diol by gas chromatography with mass spectrometric detection using deuterated 3-chloropropane-1,2-diol as internal standard
3-chloropropane-1,2-diol (3-MCPD) chloropropanediols 3-MCPD esters phenylboronic acid food analysis
2014/3/19
An improved routine, simple and sensitive method is presented for the determination of free and bound 3-chloropropane-1,2-diol (3-MCPD) in different foods using capillary gas chromatography with mass ...
Determination of 90Sr Accumulation in Human Teeth
Tooth 90Sr 90Y Calcium Flame atomic absorption spectrometer
2010/4/21
The accumulation of 90Sr in decayed or exfoliated human teeth was investigated by ultra low level beta counting. Fuming nitric acid and the necessary carriers and reagents were used for dissolving the...
Application of Potassium Chromate-Diphenylcarbazide in the Quantitative Determination of Ascorbic Acid by Spectrophotometry
Ascorbic acid determination Spectrophotometry Potassium chromate Chromium-diphenyl-carbazide complex
2010/4/21
A spectrophotometric procedure for the determination of ascorbic acid in pure form and in a number of pharmaceutical preparations and real samples has been developed that offers the advantages of simp...
Catalytic Spectrophotometric Determination of Manganese in Some Medicinal Plants and Their Infusions
manganese determination catalytic spectrophotometric method medicinal plants infusions
2010/4/21
The catalytic effect of manganese (II) on the oxidation of the dye 1,3-Dimethyl- 2 [4-N (N,N-dimethylamino) phenylazo] imidazolium perchlorate (BR) with potassium periodate in the presence of 1,10-phe...