نتایج جستجو برای: ion detection

تعداد نتایج: 762730  

Journal: :Materials advances 2022

Selective detection of Sm 3+ ion at a very low concentration is achieved using tetra-coordinated boron appended Zinc(salen).

Journal: :Mass spectrometry reviews 1998
A G Marshall C L Hendrickson G S Jackson

This review offers an introduction to the principles and generic applications of FT-ICR mass spectrometry, directed to readers with no prior experience with the technique. We are able to explain the fundamental FT-ICR phenomena from a simplified theoretical treatment of ion behavior in idealized magnetic and electric fields. The effects of trapping voltage, trap size and shape, and other nonide...

2013
Zafar Hussain Ibupoto Kimleang Khun Magnus Willander

In this research work, ZnO nanotubes were fabricated on a gold coated glass substrate through chemical etching by the aqueous chemical growth method. For the first time a nanostructure-based iodide ion selective electrode was developed. The ZnO nanotubes were functionalized with miconazole ion exchanger and the electromotive force (EMF) was measured by the potentiometric method. The iodide ion ...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2018
Fouzia Akter Shingo Saito Yuiko Tasaki-Handa Masami Shibukawa

A new analytical methodology for a simple and efficient on-line preconcentration of trace inorganic anions in water and salt samples prior to ion chromatographic determination is proposed. The preconcentration method is based on partition/ion-exclusion chromatographic ion stacking (PIEC ion stacking) with a hydrophilic polymer gel column containing a small amount of fixed anionic charges. The d...

Journal: :The Analyst 2013
Yun-Fei Hsu Jung-Lee Lin Ming-Lee Chu Yi-Sheng Wang Chung-Hsuan Chen

We present a newly developed macromolecular ion accelerator mass spectrometer that combines a dual-ion-trap device and a macromolecular ion accelerator (MIA) to achieve the capability of analyzing samples with a mixture of large biomolecules. MIA greatly increases detection efficiency. The dual ion trap includes a quadrupole ion trap (QIT) and a linear ion trap (LIT) in tandem. The dual ion tra...

2009
G. Eitel D. Rodríguez C. Smorra K. Blaum

A commercial, position-sensitive ion detector was used for the rst time for the time-ofight ion-cyclotron resonance detection technique in Penning trap mass spectrometry. In this work, the characteristics of the detector and its implementation in a Penning trap mass spectrometer will be presented. In addition, simulations and experimental studies concerning the observation of ions ejected from ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده مهندسی برق و کامپیوتر 1393

در این پروژه هدف طراحی و ساخت fluorescence detection systemجهت آشکارسازی مولکول های dna می باشد. در روش pcr، طی چندین چرخه دمایی، مولکول های dna کپی می شوند و سپس با استفاده از روش fluorescence detection، مولکول های بر انگیخته شده dna آشکارسازی می شوند. پس از آشکارسازی می توان به کپی و یا عدم کپی dnaها پی برد.می توان برای جداسازی مولکول های dna بر اساس طولشان، از روش gel electrophoresis استفاده...

Journal: :journal of the iranian chemical research 0
farshid ahmadi chemistry department, islamic azad university, gachsaran branch, gachsaran, iran azadeh khanmohammadi young researchers club, islamic azad university, gachsaran branch, gachsaran, iran ziba tavakoli chemistry department, islamic azad university, gachsaran branch, gachsaran, iran jamshid jafarpour chemistry department, islamic azad university, gachsaran branch, gachsaran, iran

a simple and sensitive method is described for the pre-concentration by cloud point extraction followed by atomic absorption spectrometric determination of copper ion in real samples. at a solution ph of 5.5, 5, 5-diphenylimidazolidine-2, 4-dione (phenytoin) (dfid) and tritonx-114 were used as hydrophobic ligand and non-ionic surfactant. the adopted concentrations for dfid, triton x-114 and hno...

2013
Hui Li Xiao-Xi Huang Yang Cai Hao-Jie Xiao Qiu-Fen Zhang De-Ming Kong

Label-free metal ion detection methods were developed. To achieve these, a reconstructed Cu(2+)-specific DNA-cleaving DNAzyme (Cu(2+)-specific DNAzyme) with an intramolecular stem-loop structure was used. G-quadruplex-forming G-rich sequence(s), linked at the ends of double-helix stem of an intramolecular stem-loop structure, was partly caged in an intramolecular duplex or formed a split G-quad...

Journal: :Sensors & diagnostics 2023

A trace lead ion (Pb 2+ ) detection platform combining surface-enhanced Raman spectroscopy (SERS) with nucleic acid cycle multiple signal amplification.

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