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Showing 1 to 20 of 81 for “"Flow Injection"”.
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Immunoassays by flow injection analysis.
A home-built flow injection analysis (FIA) system was fully automated using an Apple IIe microcomputer, and subsequently used as a versatile system for the study of immunoassay procedures. The performance of the automated system was monitored by using the turbidimetric detection of barium sulphate …
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Flow Injection Analysis of Sulfur Dioxide.
… an automated and microprocessor-controlled flow injection analysis system for sulfur dioxide using a West-Gaeke method. Two systems were developed for this purpose: The first system allowed continuous reagent flow into the carrier stream, while the second system allowed programmed injection …
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Industrial applications of flow injection analysis
Flow injection analysis (FIA) is characterized by its ease of automation, high throughput, simple instrumental requirements, and wide applicability. These unique features make FIA a very useful analytical tool in industrial applications. In this dissertation, FIA systems, operating both in liquid …
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Flow Injection Analysis of industrial water samples
An automated version of Flow Injection Analysis (FIA) instrumentation has been designed and evaluated for the quantitative determination of chemical oxygen demand (COD) for industrial samples. The distinct advantages over conventional COD assays are the significantly reduced analysis time (FIA …
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Flow-injection analysis of the platinum-group metals
… methods for the determination of the PGMs using flow-injection analysis (FIA). The principle of exploiting the remarkably specific and selective reaction of stannous halides with the PGMs to yield a series of intensely coloured complexes in acidic solutions forms the basis of these methods. The …
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AUTOMATED FLOW INJECTION INSTRUMENTATION FOR MONITORING NITROGEN SPECIES IN NATURAL WATERS
… 1000 miniature spectrometer into a gas diffusion Flow Injection (Fl) manifold for the determination of ammonia in natural waters is detailed in Chapter Three. Optimisation of the Fl parameters and analytical performance are discussed in detail. The development of an immobilised pH indicator and …
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Field sampling and flow injection strategies for trace analysis and element speciation.
… pretreatments in combination with flow injection (FI) is discussed.Chapter 2 describes mercury speciation experiments utilising gas chromatography-microwave induced plasma-atomic emission spectrometry (GC-MIP-AES) and FI. The approach was based on the preconcentration of mercury on …
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Marine Biogeochemistry Studies of Iron and Hydrogen Peroxide using Flow Injection-Chemiluminescence
… the development and optimisation of sensitive flow injection-chemiluminescence techniques to assess redox processes at the cellular level and their application to investigate marine processes. Two flow injection methods, one based on direct sample injection and another involving the …
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FLOW INJECTION TECHNIQUES FOR INVESTIGATING THE BIOGEOCHEMISTRY OF NUTRIENTS IN NATURAL WATERS
This thesis describes the development of robust flow injection (FI) techniques for the determination of nutrients, with a focus on phosphorus species, in natural waters. Chapter one presents a general overview of nutrients (P, N and Si) and their aquatic biogeochemistry and analytical methods for …
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The development and optimisation of novel flow injection analysis methods for GSK
… of this work was to exploit the technology of flow injection (FI) analysis to develop fast, new and automated novel methods for the benefit of the pharmaceutical and consumer healthcare (CH) industry at GSK. Two (general) approaches for optimisation of the method variables have been applied in …
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Applications of Electrocatalyzed Chemiluminescence of Luminol (Hydrogen Peroxide, Glucose, Electrogeneration, Flow Injection)
During the past several decades, the luminol chemiluminescence (CL) reaction has been successfully applied to the sensitive determination of a variety of analytes. The research reported here made use of electrochemical methods both to catalyze the luminol CL reaction and to generate reagents for …
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Determination of hydrogen peroxide using immobilized chemiluminescence reagents and flow injection analysis
… the CL determination of hydrogen peroxide using flow injection analysis (FIA) was investigated. Nylon was initially chosen as the immobilization support because of its chemical inertness. Luminol was covalently immobilized on the inside of nylon tubing and used for FIA determination of peroxide …
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DISSOLUTION OF AEROSOL IRON IN SEA WATER USING FLOW-INJECTION WITH CHEMILUMINESCENCE DETECTION
Iron is an essential micronutrient for the metabolism of marine organisms and impacts on primary productivity and hence indirectly on climate change. The dominant source of iron to the sea surface in open ocean regions is from the atmosphere by aeolian dust transport but the solubility of iron from …
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THE DETERMINATION OF COPPER IN SEA WATER USING FLOW INJECTION WITH CHEMILUMINESCENCE DETECTION
… optimisation and shipboard deployment of a flow injection - chemiluminescence (FI-CL) technique for the determination of labile Cu(II) and total copper (by UV irradiation) in seawater. The operational parameters of the FI manifold in a UHP water sample matrix and the 1,10-phenanthroline CL …
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FLOW INJECTION INSTRUMENTATION FOR THE IN SITU MONITORING OF NUTRIENTS IN SEA WATER
… of the system, e.g. sample delivery system, injection valve, reduction column, reaction column, flowcell, on-board control system and the housing of the complete integrated system. Chapter Four describes the optimisation and analytical performance of the FI instalment prior to field trials. …
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Flow injection chemistries for the in situ monitoring of nutrients in sea water
… nitrite) and phosphate (as orthophosphate) using Flow Injection (FI) analysis. Chapter One describes the role of nitrogen and phosphorus in the aquatic environment and overviews laboratory and in situ methods for their determination. Chapter Two describes the development and optimisation of an FI …
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Flow Injection Determination of Sugars by Combining Immobilized Enzyme Reactors and Chemiluminescence Detection
Chemiluminescence has long been known as a sensitive means of detection, but analytical applications have been limited due to a lack of selectivity. There has been much interest in recent years in combining chemiluminescence detection with the inherent selectivity of enzyme reactions. The …
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Electrogenerated chemiluminescence of isoluminol and acridinium esters in flow injection analysis and HPLC
Electrogenerated chemiluminescence (ECL) is the process in which electrochemically generated reactants undergo high energy electron transfer reactions in solution to generate excited state molecules which relax to the ground state with emission of light. Such reactions offer several advantages in …
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The application of planar optical waveguides to absorption spectrometry in flow injection analysis
… in common analytical techniques such as Flow Injection Analysis because of their relatively low sensitivity. The feasibility of using a thin film planar waveguide as an absorption sensor in the Flow Injection Analysis of Urea was investigated. Urea was hydrolyzed to ammonia and carbon …
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