Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"sample pre-treatment"”.
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An investigation of some chromatographic and electrophoretic seperations for industrial and clinical applications
… and can be ideal methods due to low sample and material consumption, reduced analysis times and increased separation efficiencies. A HPLC method was developed and successfully applied to the analysis of the photoinitiator, bis(2,4,6-trimethylbenzoyl)phenyl-phosphine oxide. A …
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Determination of hydrogen peroxide using immobilized chemiluminescence reagents and flow injection analysis
… (detection limit = 25 $\mu$M). The problem presented by real samples was solved using a sample pre-treatment technique.
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Innovative analytical methods for Central Nervous System Drug analysis in biological fluids
… approved and introduced on the market for the treatment of many psychiatric and neurological disorders, including psychosis, depression, Parkinson disease and epilepsy. Despite the great advancements obtained in the treatment of CNS diseases/disorders, partial response to therapy or treatment …
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The Fermentation of Cheese Whey by Lactobacilius helvecticus
… by Lactobacillus helveticus was studied. Precipitate formation during autoclaving of whey permeate was examined. Precipitation was found to be pH and temperature dependent. Qualitative analysis suggested that the precipitate was a calcium-phosphate complex. Solubilisation was achieved both …
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Biomolecular engineered sensors for diagnostic applications
… the technologies employing carbon electrodes is presented in Chapter 1 and serves to set the context of the subsequent research. The various methodologies employed are outlined in Chapter 2. Preliminary modifications of the analytical process has evolved from the ex situ functionalisation of the …
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Diffusing wave spectroscopy applied to material analysis and process control
… sensor, capable of near real-time feedback. No sample pre-treatment was required and measurement was via a noninvasive, flexible, dip in probe. <br></br><br></br>DWS relies on the concept of the diffusive migration of light, as opposed to the ballistic scatter model used in conventional dynamic …
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THE ANALYSIS OF SAMPLES WITH COMPLEX MATRICES FOR ELEMENTAL CONCENTRATION
… industry, elemental exposures are often present in the form of contamination and must be monitored for public safety due to the potential toxic effects they can have upon consumers. The following work shows a method to rapidly analyze foodstuffs and medications for elements of interest …
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Printable graphene sensing systems for drug and alcohol detection
… sensors, targeting chemical species that were previously difficult to detect. When developing sensors for alcohol and psychoactive drugs, the response time is an essential factor for many industrial, pharmaceutical and forensic applications, particularly when it comes to portable, point of care …
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Lead (Pb) Contamination of Potable Water: Public Health Impacts, Galvanic Corrosion and Quantification Considerations
… revealed that serious lead-in-water hazards are present at many US schools and homes, and that the threat to individuals is not eliminated by existing regulations. Health studies have provided strong links between lead in water and lead in blood of exposed populations, even at relatively low …
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Measurement and modelling of uranium and thorium in natural waters
… of low levels of uramum and thorium in the presence of high levels of inorganic and organic matrix components has been achieved by coupling on-line solid phase extraction (SPE) with inductively coupled plasma mass spectrometry (ICP-MS) detection. This allowed direct analysis of water samples …
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Development of a portable microfluidic system for monitoring ions river water
Nowadays, there is a growing demand for predictive models that are capable of predicting future trends in water quality which is constantly being affected by environmental changes and industrialisation. The presence of various nutrient contaminants in surface water poses a serious threat to human …
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Development and Applications of Liquid Sample Desorption Electrospray Ionization Mass Spectrometry (DESI-MS)
… the development and the applications of liquid sample desorption electrospray ionization mass spectrometry (DESI-MS), a new ambient ionization method with focus on the direct analysis of liquid samples. A variety of new applications of liquid sample DESI are discussed in details including …
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Development of techniques for the assessment of denitrification in New Zealand soils
… farming. Nevertheless, N deficiency is widespread throughout New Zealand pastures, indicating that either the N supply is inadequate, or that significant losses are occurring from the system. The contribution of denitrification to these losses is unknown, primarily because at present there is …