Quantitative evaluation of analyte transport on microfluidic paper-based analytical devices (μPADs)

The Analyst ◽  
2018 ◽  
Vol 143 (3) ◽  
pp. 643-653 ◽  
Author(s):  
Riki Ota ◽  
Kentaro Yamada ◽  
Koji Suzuki ◽  
Daniel Citterio
Keyword(s):  
Quantitative Evaluation ◽  
Absorption Spectrometry ◽  
Transport Efficiency ◽  
Analyte Transport

This work quantitatively evaluates the transport efficiency of analytical target compounds on microfluidic paper-based analytical devices by means of colorimetry and absorption spectrometry.

Quantitative evaluation of transport efficiency of fault-reservoir composite migration pathway systems in carbonate petroliferous basins

Energy ◽  
2021 ◽  
Vol 222 ◽  
pp. 119983
Author(s):  
Wenyang Wang ◽  
Xiongqi Pang ◽  
Zhangxin Chen ◽  
Dongxia Chen ◽  
Yaping Wang ◽  
...  
Keyword(s):  
Quantitative Evaluation ◽  
Transport Efficiency ◽  
Migration Pathway

Effect of Oxygen Ashing on Analyte Transport Efficiency Using ETV-ICP-MS

1997 ◽  
Vol 51 (12) ◽  
pp. 1800-1806 ◽  
Author(s):  
R. W. Fonseca ◽  
N. J. Miller-Ihli ◽  
C. Sparks ◽  
J. A. Holcombe ◽  
B. Shaver
Keyword(s):  
Rapid Heating ◽  
Graphite Furnace ◽  
Graphite Substrate ◽  
Scanning Electron Micrographs ◽  
Slurry Sampling ◽  
Transport Efficiency ◽  
Carbon Particles ◽  
Icp Ms ◽  
Effect Of Oxygen ◽  
Analyte Transport

Oxygen ashing has been used in electrothermal atomic absorption spectroscopy to eliminate organic matrix sample components and is particularly useful when doing direct solids analysis of biologicals using ultrasonic slurry sampling. Oxygen ashing has also proven to be useful for the analysis of slurry samples using ultrasonic slurry sampling electrothermal vaporization inductively coupled plasma mass spectrometry (USS-ETV-ICP-MS). In this work, the effect of oxygen ashing on analyte transport in USS-ETV-ICP-MS was evaluated. Oxygen ashing in the presence of Pd modifier (Pd/O2) enhances analyte transport efficiency, possibly as a result of an increase in the number of carbon particles present in the graphite furnace during the vaporization step. These carbon particles act as a physical carrier, providing a surface on which the analytes can condense to be transported more efficiently. The carbon produced at earlier times, with Pd/O2, may be the result of either dissociation or fracture of the graphite during the rapid heating of the furnace. Pd, which was initially added to act as a physical carrier, also seems to be acting as a catalyst for carbon oxidation. The shift in the carbon signal toward earlier times when using oxygen ashing was observed only when Pd was present. In addition, scanning electron micrographs of a home-made graphite platform revealed that portions of the graphite substrate were missing when Pd/O2 was used and that clearly visible pits were found in the graphite. Oxygen ashing combined with 1 μg Pd improves quantitative results by removing the organic part of the matrix present in slurry samples while enhancing analyte transport efficiency by providing carbon particles that serve as a physical carrier.

Quantitative evaluation of -ray spectra from scintillation measurements

Physica ◽  
1952 ◽  
Vol 18 (2) ◽  
pp. 1147-1150
Author(s):  
D MAEDER ◽  
V WINTERSTEIGER
Keyword(s):  
Quantitative Evaluation

Qualitative-Quantitative Evaluation of Depressive Symptomatology

2017 ◽  
Author(s):  
Francesca Serra ◽  
Andrea Spoto ◽  
Marta Ghisi ◽  
Giulio Vidotto
Keyword(s):  
Quantitative Evaluation ◽  
Depressive Symptomatology
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