A flow-injection system exploiting focused beam reflectance applied to the determination of high concentrations of sulfate

2020 ◽  
Author(s):  
Wu Su
Keyword(s):  
Flow Injection ◽  
Particle Number ◽  
Injection System ◽  
Reflectance Measurement ◽  
Flow Mixing ◽  
Peg 4000 ◽  
Flow Injection System ◽  
High Concentrations ◽  
Focused Beam

To evaluate grain size and particle number formed in non-equilibrium flow mixing state, flow-injection analysis (FIA) was combined with focused beam reflectance measurement (FBRM). Influence of BaCl2, PEG-4000, ethanol, flowrate,...

scholarly journals Determination of Zinc-Based Additives in Lubricating Oils by Flow-Injection Analysis with Flame-AAS Detection Exploiting Injection with a Computer-Controlled Syringe

2005 ◽  
Vol 2005 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Gustavo Pignalosa ◽  
Moisés Knochen ◽  
Noel Cabrera
Keyword(s):  
Flow Injection ◽  
Computer Control ◽  
Injection System ◽  
Mean Values ◽  
Lubricating Oils ◽  
Low Concentrations ◽  
Flow Injection System ◽  
High Concentrations ◽  
Zinc Levels

A flow-injection system is proposed for the determination of metal-based additives in lubricating oils. The system, operating under computer control uses a motorised syringe for measuring and injecting the oil sample (200μL) in a kerosene stream, where it is dispersed by means of a packed mixing reactor and carried to an atomic absorption spectrometer which is used as detector. Zinc was used as model analyte. Two different systems were evaluated, one for low concentrations (range 0–10 ppm) and the second capable of providing higher dilution rates for high concentrations (range 0.02%–0.2% w/w). The sampling frequency was about 30 samples/h. Calibration curves fitted a second-degree regression model (r2= 0.996). Commercial samples with high and low zinc levels were analysed by the proposed method and the results were compared with those obtained with the standard ASTM method. Thettest for mean values showed no significant differences at the 95% confidence level. Precision (RSD%) was better than 5% (2% typical) for the high concentrations system. The carryover between successive injections was found to be negligible.

Spectrofluorimetric optosensing of aluminium in a flow injection system: determination of aluminium in dialysis fluids and concentrates

The Analyst ◽  
1990 ◽  
Vol 115 (5) ◽  
pp. 575-579 ◽  
Author(s):  
Maria Rosario Pereiro García ◽  
Marta Elena Díaz García ◽  
Alfredo Sanz-Medel
Keyword(s):  
Flow Injection ◽  
Injection System ◽  
Flow Injection System ◽  
Dialysis Fluids

Determination of S-perindopril using a flow injection system with an amperometric biosensor

1999 ◽  
Vol 54 (3) ◽  
pp. 261-265 ◽  
Author(s):  
Raluca-Ioana Stefan ◽  
Jacobus (Koos) F. van Staden ◽  
Hassan Y. Aboul-Enein
Keyword(s):  
Flow Injection ◽  
Amperometric Biosensor ◽  
Injection System ◽  
Flow Injection System
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