Dual-Channel Mixing: Standard Addition by Dual-Channel Continuous Flow Mixing for Assay of Complex Nephrolithiasis Biomarkers in Urine

2015 ◽  
pp. 98-109
Keyword(s):  
Continuous Flow ◽  
Standard Addition ◽  
Dual Channel ◽  
Flow Mixing

Tomography images to analyze the deformation of the cavern in the continuous-flow mixing of non-Newtonian fluids

AIChE Journal ◽  
2013 ◽  
Vol 60 (1) ◽  
pp. 315-331 ◽  
Author(s):  
Dineshkumar Patel ◽  
Farhad Ein-Mozaffari ◽  
Mehrab Mehrvar
Keyword(s):  
Continuous Flow ◽  
Newtonian Fluids ◽  
Flow Mixing

Mass transfer in a continuous-flow mixing vessel

AIChE Journal ◽  
1957 ◽  
Vol 3 (2) ◽  
pp. 283-286 ◽  
Author(s):  
D. W. Humphrey ◽  
H. C. Van Ness
Keyword(s):  
Mass Transfer ◽  
Continuous Flow ◽  
Flow Mixing

scholarly journals Assessment of long distance chasing photometer (NAG-ADF-300-2) by estimating the drug atenolol with ammonium molybdate via continuous flow injection analysis

2020 ◽  
Vol 17 (1) ◽  
pp. 0078
Author(s):  
Elham N. Mezaal N. Mezaal
Keyword(s):  
Flow Injection ◽  
Flow Injection Analysis ◽  
Continuous Flow ◽  
Classical Method ◽  
Standard Addition ◽  
Calibration Graph ◽  
Ammonium Molybdate ◽  
Long Distance ◽  
Optimum Parameters

     Atenolol was used with ammonium molybdate to prove the efficiency, reliability and repeatability of the long distance chasing photometer (NAG-ADF-300-2) using continuous flow injection analysis. The method is based on reaction between atenolol and ammonium molybdate in an aqueous medium to obtain a dark brown precipitate. Optimum parameters was studied to increase the sensitivity for developed method. A linear range for calibration graph was 0.1-3.5 mmol/L for cell A and 0.3-3.5 mmol/L for cell B, and LOD 133.1680 ng/100 µL and 532.6720 ng/100 µL for cell A and cell B respectively with correlation coefficient (r) 0.9910 for cell A and 0.9901 for cell B, RSD% was lower than 1%, (n=8) for the determination of atenolol at concentration (0.5, 0.7 and 5) mmol/L respectively. The results were compared with classical method UV-Spectrophotometric at λ max=270 nm using the standard addition method via the use of t-test, at 95% confidence level. The comparison of data explain that long distance chasing photometer (NAG-ADF-300-2) is the choice with excellent extended detection and wide application.                                                                                                       

scholarly journals Using tomography, CFD, and dynamic tests to study the continuous-flow mixing of yield-pseudoplastic fluids

2021 ◽  
Author(s):  
Dineshkumar Patel
Keyword(s):  
Yield Stress ◽  
Continuous Flow ◽  
Mixing Time ◽  
Mixed Volume ◽  
Dynamic Tests ◽  
Ideal Mixing ◽  
Flow Mixing ◽  
Batch Mixing ◽  
Pseudoplastic Fluids ◽  
2D And 3D

The major technological challenges faced by modern chemical industries are non-ideal flows such as dead zones and channeling encountered in the mixing of fluids with complex rheology. These cause sub-optimal mixing and lead to low quality products and high costs of raw materials. Therefore, the core objectives of this study were to develop methodology and tools to design an efficient continuous-flow mixing system for the fluids with complex rheology using electrical resistance tomography (ERT), computational fluid dynamics (CFD), and dynamic tests. The xanthan gum solution, which is a pesudoplastic fluid with yield stress, was used to study the dynamic behavior of the continuous-flow mixing process. The power consumption, cavern size, mixing time, and the extents of channelling and the fraction of fully mixed volume were successfully determined using dynamic tests, ERT tests, and CFD simulations and used as mixing quality criteria. A novel and efficient method was developed for flow visualization in the continuous-flow mixing of opaque fluids using 2D and 3D tomograms. A unique study on identifying the sources of flow non-ideality in non-Newtonian fluids with yield stress was done by visualizing the flow pattern inside the continuous-flow mixing vessel using 2D and 3D tomograms. The deformation of the cavern was analyzed and quantified in the continuous-flow mixing system for yield-pseudoplastic fluids using ERT. Moreover, the cavern volume was compared with the fully mixed volume and it was found that the latter was higher due to the extra momentum induced by the inlet-outlet flow. A novel study on exploring the effect of the rheological parameters of the pseudoplastic fluids with yield stress on the non ideal flows in a continuous-flow mixing system was performed using CFD. The CFD results revealed that the mixing quality was improved when the degree of the shear thinning was increased. The ratio of the residence time to the batch mixing time was evaluated to achieve ideal mixing for the continuous-flow mixing of yield-pseudoplastic fluids using dynamic tests and ERT. It was found that the ratio of residence time to the batch mixing time should be at least 8.2 or higher to achieve ideal mixing.

Apparatus for continuous flow mixing of explosive gases

1968 ◽  
Vol 1 (4) ◽  
pp. 459-462 ◽  
Author(s):  
M M Kamel ◽  
E Lundstrom ◽  
A K Oppenheim
Keyword(s):  
Continuous Flow ◽  
Flow Mixing
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