Comparison of three common DNA concentration measurement methods

2014 ◽  
Vol 451 ◽  
pp. 18-24 ◽  
Author(s):  
Xiaofei Li ◽  
Yuhua Wu ◽  
Li Zhang ◽  
Yinglong Cao ◽  
Yunjing Li ◽  
...  
Keyword(s):  
Measurement Methods ◽  
Concentration Measurement ◽  
Dna Concentration

Concentration Measurement of Lithium Bromide Aqueous Solution by Electrical Resistivity

2010 ◽  
Author(s):  
Jian Sun ◽  
Lin Fu ◽  
Shigang Zhang ◽  
Wei Hou
Keyword(s):  
Aqueous Solution ◽  
Electrical Resistivity ◽  
Lithium Bromide ◽  
Measurement Methods ◽  
Concentration Measurement ◽  
Low Grade ◽  
Saving Energy ◽  
Resistivity Data ◽  
Absorption Chillers ◽  
Low Grade Heat

Absorption chillers have currently become an important device in saving energy because of its effectiveness in utilizing low grade heat. Lithium bromide is widely used as absorbent in this system. But there were few outstanding concentration measurement methods in practice before. In this paper, complete electrical resistivity data of lithium bromide aqueous solution for concentration measurement was given. The electrical resistivity of lithium bromide aqueous solution was measured at concentrations of 35–70 wt% of lithium bromide and temperatures of 10–100°C. Results of this work can meet the requirement of concentration measurement of lithium bromide in absorption chillers without extracting samples.

Monodispersion Soot Particle Interference on NO2 Concentration Measurement Accuracy Using NDIR

2013 ◽  
Vol 345 ◽  
pp. 251-254
Author(s):  
Yan Jun Zhao ◽  
Shou Guang Cheng ◽  
Bin Qu
Keyword(s):  
Light Intensity ◽  
Measurement Accuracy ◽  
Solution Method ◽  
Soot Particle ◽  
Measurement Methods ◽  
Concentration Measurement ◽  
Infrared Light ◽  
Soot Particles ◽  
Characteristic Wavelength ◽  
The Impact

NDIR is one of the NO2 concentration measurement methods. The NO2 concentration can be figured out by measuring the attenuation of the infrared light intensity on the characteristic wavelength. But the infrared light intensity is also attenuated by the monodispersion soot particles because of the particles absorption and scattering. So the monodispersion soot particles can impact the NO2 concentration accuracy. The interference of the monodispersion particles is discussed in the paper. Simulation results show that the impact parameters on the NO2 concentration accuracy include the received scattering angle range, particle size and concentration. The solution method is brought out and NO2 concentration measurement accuracy can be improved.

Research on Environment Materials with NDIR NO2 Concentration Measurement by Soot Position Influence

2014 ◽  
Vol 540 ◽  
pp. 255-258
Author(s):  
Yan Jun Zhao ◽  
Cheng Bin Gao ◽  
Bin Qu
Keyword(s):  
Light Intensity ◽  
Measurement System ◽  
Solution Method ◽  
Daily Life ◽  
Measurement Methods ◽  
Concentration Measurement ◽  
Infrared Light ◽  
Gaseous Pollutants ◽  
Actual Concentration ◽  
Simulation Results

Environment materials play important role in our daily life. It includes so many types. NO2 is one of the most important gaseous pollutants and NO2 concentration measurement system is one part of the CEMS system. There have many NO2 concentration measurement methods and NDIR is used commonly. The received angle of the measurement light is gradually decreases while the distance between soot and the receiver becomes larger; so the true infrared light intensity is smaller than the theoretical infrared light intensity and NO2 concentration is less than the actual concentration. To reduce the soot position influence, soot position influence on NO2 concentration measurement using NDIR is studied. The influence of the different soot position is analyzed. The simulation results show that the different soot position can influent the NO2 concentration accuracy. The solution method on decreasing the soot poison influence is brought out and can improve the NO2 concentration accuracy.

Interference Mechanism on NO2 Concentration by the Multidispersion Soot Using NDIR

2013 ◽  
Vol 345 ◽  
pp. 255-258
Author(s):  
Yan Jun Zhao ◽  
Shou Guang Cheng ◽  
Bin Qu
Keyword(s):  
Light Intensity ◽  
Measurement Accuracy ◽  
Measurement Methods ◽  
Concentration Measurement ◽  
Intensity Attenuation ◽  
Soot Particles ◽  
Infrared Measurement ◽  
Distribution Parameters ◽  
Average Size ◽  
Interference Mechanism

NDIR is one of the important NO2 concentration measurement methods. The NO2 concentration can be figured out through measuring the light intensity attenuation. But the scattering and absorption of the multidispersion soot particles can attenuate the light intensity, so the infrared measurement light intensity attenuation is larger and the concentration is increased. The interference on the NO2 concentration caused by the multidispersion soot particles is discussed in the paper. The dissipativity, concentration, average size, size distribution parameters and the scattering light angle range of the multidispersion soot particles can interference the NO2 concentration. The method to reduce the interference is brought out and the NO2 concentration measurement accuracy is improved.

Protection Windows Interference of the Multidispersion Soot on NDIR NO2 Concentration Accuracy

2014 ◽  
Vol 886 ◽  
pp. 228-231
Author(s):  
Yan Jun Zhao ◽  
Cheng Bin Gao
Keyword(s):  
Numerical Simulation ◽  
Light Intensity ◽  
Nitrogen Dioxide ◽  
Measurement Accuracy ◽  
Solution Method ◽  
Mie Theory ◽  
Measurement Methods ◽  
Concentration Measurement ◽  
Soot Concentration ◽  
Simulation Based

NDIR method is one of the important nitrogen dioxide concentration measurement methods. The original and the transmission light intensity on the nitrogen dioxide attached on the protection windows is attenuated because of the soot scattering and absorption and the received light intensity on the nitrogen dioxide Characteristic absorption wavelength is deviated from the theoretical absorption light intensity, so the nitrogen dioxide concentration measurement accuracy is decreased. The protection windows pollution interference caused by the monodispersion soot is discussed in this paper. The numerical simulation based on the Mie theory results show that the nitrogen dioxide concentration measurement accuracy is related to the soot concentration, soot diameter and so on. The solution method of the windows pollution interference is brought out and the nitrogen dioxide concentration measurement accuracy can be improved.

A critical comparison of selected implicit measurement methods.

2018 ◽  
Vol 11 (4) ◽  
pp. 249-266 ◽  
Author(s):  
Judith Znanewitz ◽  
Lisa Braun ◽  
David Hensel ◽  
Claudia Fantapié Altobelli ◽  
Fabian Hattke
Keyword(s):  
Measurement Methods ◽  
Critical Comparison ◽  
Implicit Measurement
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