@masterthesis{Wong, type = {Bachelor Thesis}, author = {Wong, Chui Yi}, title = {Selectivity and Sensitivity Based Emission Line Table for Analysis of Typical, Environmentally Relevant Matrices by Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES)}, school = {Hochschule Rhein-Waal}, abstract = {The thesis presents the development of a method which can be used for the easy and accurate selection of suitable emission lines for the analysis of specific elements in soil samples. In the formation of line spectra, line broadening, e.g. Doppler broadening and natural line broadening, might occur causing asymmetric line shape and emission lines“ overlap from various elements. Frequently, the emission line of the element of interest is in close proximity or even overlap-ping with the emission lines from other elements. Two classification tables were developed during this thesis: the emission line table and the interference table. The emission line table serves as the first step in identifying possible emis-sion lines of an element according to their sensitivity. The interference table was created for each emission line listed in the aforementioned table to highlight possible interferences caused by other elements present in the soil sample. In addition to the classification tables, a procedure flow chart was designed as a guideline for users to ensure proper use of elaborated tables during soil sample analysis. Results obtained from the filtering method such as full width at half maximum (FWHM) and symmetry using area comparison proves to be suitable even for Doppler broadening. Identifica-tion of possible interference to a certain distance was decided empirically through emission line graphs comparison while using the FWHM as a factor for the distance range. A threshold of sensitivity difference between the element of interest and possible interfering elements was also established based on an assumption of 10\% interference for each distance range. Tables and flow chart presented in this thesis prove the feasibility of the elaborated method in identifying suitable emission lines for an element during soil sample analysis. Further studies should be performed to test (re)producibility of obtained data.}, language = {en} } @masterthesis{Sturza, type = {Bachelor Thesis}, author = {Sturza, Loredana}, title = {Selection of Global Standardization Samples for Optical Emission Spectrometry from Practical and Materials Science Perspectives}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:1383-opus4-20939}, school = {Hochschule Rhein-Waal}, abstract = {The focus of this thesis is to address the task of alloy selection for Optical Emission Spectrometry (OES) applications. The main goal is to develop standardised samples for SPECTRO OES devices that can be utilised during routine analysis in automatic processes. The selection criteria include machinability, signal performance, and homogeneity. To achieve these goals, a set of practical tests were carried out. The initial research involves using the existing SPECTRO sample library to identify suitable alloys for standardised production in large batches. In the end, a database is suggested with existing alloys as possible candidates for future production. The chosen alloy must generate signals within specified wavelength ranges and exhibit machinability for post-analysis processing. The thesis introduces a unique approach to assessing machinability using chip analysis, emphasising the role of chip characteristics in understanding the material's suitability for machining. The study found that the E/3 sample, especially among samples with zirconium, demonstrated exceptional machinability. Moreover, the research delves into the importance of power consumption measurements during milling as an informative parameter for machining requirements. The study examines the chemical composition necessary to produce consistent and robust signals across the spectrum, with a particular focus on elements like zirconium, nickel, iron, copper, titanium, and manganese, but also phase diagrams to understand the homogeneity of aluminium alloying elements. Sample 518X905 is highlighted for its role in enhancing emission lines. In conclusion, the thesis proposes an alloy composition that blends aluminium with various alloying elements to meet specific research requirements. Copper, iron, zinc, silicon, nickel, zirconium, chromium, and vanadium provide flexibility for crafting tailored samples. Existing primary alloying elements, including those with copper, zinc, and silicon, can be considered. However, zirconium with a concentration of 0.6\% to 1\% is pivotal in the proposed alloy recipe.}, language = {en} }