Method for isotope ratio drift correction by internal amplifier signal synchronization in MC-ICPMS transient signals

2014 ◽  
Vol 29 (9) ◽  
pp. 1607-1617 ◽  
Author(s):  
Alkiviadis Gourgiotis ◽  
Sylvain Bérail ◽  
Pascale Louvat ◽  
Hélène Isnard ◽  
Julien Moureau ◽  
...  
Keyword(s):  
Isotope Ratio ◽  
Drift Correction ◽  
Simple Method ◽  
Transient Signals ◽  
Signal Synchronization

This work provides a simple method for isotope ratio drift correction in MC-ICPMS transient signals.

Stable isotope ratio analysis as a fast and simple method for identifying the origin of chitosan

2020 ◽  
Vol 101 ◽  
pp. 105516
Author(s):  
Matteo Perini ◽  
Tiziana Nardin ◽  
Matteo Venturelli ◽  
Silvia Pianezze ◽  
Roberto Larcher
Keyword(s):  
Stable Isotope ◽  
Isotope Ratio ◽  
Stable Isotope Ratio ◽  
Ratio Analysis ◽  
Simple Method ◽  
Isotope Ratio Analysis ◽  
Stable Isotope Ratio Analysis

scholarly journals Technical note: Coupling infrared gas analysis and cavity ring down spectroscopy for autonomous, high-temporal-resolution measurements of DIC and <i>δ</i><sup>13</sup>C–DIC

2017 ◽  
Vol 14 (5) ◽  
pp. 1305-1313 ◽  
Author(s):  
Mitchell Call ◽  
Kai G. Schulz ◽  
Matheus C. Carvalho ◽  
Isaac R. Santos ◽  
Damien T. Maher
Keyword(s):  
Temporal Resolution ◽  
Isotope Ratio ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Stable Isotope Ratio ◽  
Small Sample ◽  
High Temporal Resolution ◽  
Precision Data ◽  
Simple Method ◽  
Cavity Ring Down

Abstract. A new approach to autonomously determine concentrations of dissolved inorganic carbon (DIC) and its carbon stable isotope ratio (δ13C–DIC) at high temporal resolution is presented. The simple method requires no customised design. Instead it uses two commercially available instruments currently used in aquatic carbon research. An inorganic carbon analyser utilising non-dispersive infrared detection (NDIR) is coupled to a Cavity Ring-down Spectrometer (CRDS) to determine DIC and δ13C–DIC based on the liberated CO2 from acidified aliquots of water. Using a small sample volume of 2 mL, the precision and accuracy of the new method was comparable to standard isotope ratio mass spectrometry (IRMS) methods. The system achieved a sampling resolution of 16 min, with a DIC precision of ±1.5 to 2 µmol kg−1 and δ13C–DIC precision of ±0.14 ‰ for concentrations spanning 1000 to 3600 µmol kg−1. Accuracy of 0.1 ± 0.06 ‰ for δ13C–DIC based on DIC concentrations ranging from 2000 to 2230 µmol kg−1 was achieved during a laboratory-based algal bloom experiment. The high precision data that can be autonomously obtained by the system should enable complex carbonate system questions to be explored in aquatic sciences using high-temporal-resolution observations.

Performance optimization of isotope ratio measurements in transient signals by FI-ICP-TOFMS

2003 ◽  
Vol 18 (5) ◽  
pp. 437-443 ◽  
Author(s):  
Mercedes Castillo Carrión ◽  
Jesús Reyes Andrés ◽  
Juan Antonio Martín Rubí ◽  
Håkan Emteborg
Keyword(s):  
Performance Optimization ◽  
Isotope Ratio ◽  
Transient Signals ◽  
Isotope Ratio Measurements

scholarly journals Simple Method for Stage Drift Correction

2012 ◽  
Vol 102 (3) ◽  
pp. 387a-388a
Author(s):  
Sang Hak Lee ◽  
Murat Baday ◽  
Marco Tjioe ◽  
Paul Dennis Simonson ◽  
Paul Ronald Selvin
Keyword(s):  
Drift Correction ◽  
Simple Method

scholarly journals TECHNICAL NOTE: Coupling infrared gas analysis and cavity ring down spectroscopy for autonomous, high temporal resolution measurements of DIC and δ<sup>13</sup>C-DIC

2016 ◽  
Author(s):  
Mitchell Call ◽  
Kai G. Schulz ◽  
Matheus C. Carvalho ◽  
Isaac R. Santos ◽  
Damien T. Maher
Keyword(s):  
Temporal Resolution ◽  
Isotope Ratio ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Stable Isotope Ratio ◽  
Small Sample ◽  
High Temporal Resolution ◽  
Precision Data ◽  
Simple Method ◽  
Cavity Ring Down

Abstract. A new approach to autonomously determine concentrations of dissolved inorganic carbon (DIC) and its carbon stable isotope ratio (δ13C-DIC) at high temporal resolution is presented. The simple method requires no customised design. Instead it uses two commercially available instruments currently used in aquatic carbon research. An inorganic carbon analyser utilising non-dispersive infrared detection (NDIR) is coupled to a Cavity Ring-down Spectrometer (CRDS) to determine DIC and δ13C-DIC based on the liberated CO2 from acidified aliquots of water. Using a small sample volume of 2 ml, the precision and accuracy of the new method was comparable to standard isotope ratio mass spectrometry (IRMS) methods. The system achieved a sampling resolution of 16 mins, with a DIC precision of ±1.5 to 2 µmol kg−1 and δ13C-DIC precision of ±0.14 ‰ for concentrations spanning 1000 to 3600 µmol kg−1. Accuracy of 0.1 ± 0.06 ‰ based on DIC concentrations ranging from 2000 µmol kg−1 to 2230 µmol kg−1 was achieved during a laboratory-based algal bloom experiment. The high precision data that can be autonomously obtained by the system should enable complex carbonate system questions to be explored in aquatic sciences using high temporal resolution observations.

A simple way for producing holographic filters suitable for image improvement

1978 ◽  
Vol 36 (1) ◽  
pp. 226-227
Author(s):  
K.-H. Herrmann ◽  
E. Reuber ◽  
P. Schiske
Keyword(s):  
Transfer Functions ◽  
Diffraction Order ◽  
Lateral Position ◽  
Simple Method ◽  
Spatial Frequencies ◽  
Resolution Electron ◽  
Wiener Filters ◽  
Image Improvement ◽  
Optical Reconstruction ◽  
Set Up

Aposteriori deblurring of high resolution electron micrographs of weak phase objects can be performed by holographic filters [1,2] which are arranged in the Fourier domain of a light-optical reconstruction set-up. According to the diffraction efficiency and the lateral position of the grating structure, the filters permit adjustment of the amplitudes and phases of the spatial frequencies in the image which is obtained in the first diffraction order.In the case of bright field imaging with axial illumination, the Contrast Transfer Functions (CTF) are oscillating, but real. For different imageforming conditions and several signal-to-noise ratios an extensive set of Wiener-filters should be available. A simple method of producing such filters by only photographic and mechanical means will be described here.A transparent master grating with 6.25 lines/mm and 160 mm diameter was produced by a high precision computer plotter. It is photographed through a rotating mask, plotted by a standard plotter.

Rotary Beveling for In Situ Thin-Section Microscopy of Cell Cultures

1981 ◽  
Vol 39 ◽  
pp. 550-551
Author(s):  
Dean A. Handley ◽  
Jack T. Alexander ◽  
Shu Chien
Keyword(s):  
Cell Growth ◽  
Cell Cultures ◽  
Molecular Interactions ◽  
Convenient Method ◽  
Petri Dish ◽  
Simple Method ◽  
Thin Section Microscopy ◽  
Thin Sectioning ◽  
Organic Fluids

In situ preparation of cell cultures for ultrastructural investigations is a convenient method by which fixation, dehydration and embedment are carried out in the culture petri dish. The in situ method offers the advantage of preserving the native orientation of cell-cell interactions, junctional regions and overlapping configurations. In order to section after embedment, the petri dish is usually separated from the polymerized resin by either differential cryo-contraction or solvation in organic fluids. The remaining resin block must be re-embedded before sectioning. Although removal of the petri dish may not disrupt the native cellular geometry, it does sacrifice what is now recognized as an important characteristic of cell growth: cell-substratum molecular interactions. To preserve the topographic cell-substratum relationship, we developed a simple method of tapered rotary beveling to reduce the petri dish thickness to a dimension suitable for direct thin sectioning.

Development of a simple method for the determination of single nucleotide polymorphisms

2010 ◽  
Vol 34 (8) ◽  
pp. S75-S75
Author(s):  
Weifeng Zhu ◽  
Zhuoqi Liu ◽  
Daya Luo ◽  
Xinyao Wu ◽  
Fusheng Wan
Keyword(s):  
Single Nucleotide Polymorphisms ◽  
Nucleotide Polymorphisms ◽  
Simple Method ◽  
Single Nucleotide
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