Chemistry (selective) postgraduate personal statement example

Personal statement example

On a busy Saturday at the leisure centre where I work, the combined chlorine reading in the main pool can climb steadily through the afternoon. Free chlorine reacts with nitrogen compounds from swimmers to form chloramines, which irritate eyes and give indoor pools their familiar smell. My job as a plant technician is partly routine: I run DPD tests every two hours, log pH and adjust dosing. It has also given me a practical sense of how much chemistry depends on rates, competing reactions and conditions that refuse to stay still. That interest in reactivity under real conditions is why I want to pursue a Masters in Chemistry, with a focus on catalysis and functional materials.

My undergraduate degree gave me a broad grounding, but the second-year inorganic and physical chemistry courses held my attention most. I enjoyed seeing band theory, which had seemed abstract in lectures, explain why some oxides absorb visible light and others do not. Kinetics was the topic I found hardest at first. I worked through it by redoing problem sets until I could derive integrated rate laws without notes, and it became one of my stronger exam papers.

My final-year project tested whether nitrogen-doped titanium dioxide films could degrade methylene blue under visible light more effectively than undoped films. I prepared the films by sol-gel dip coating onto glass slides, annealed them at several temperatures and followed dye concentration by UV-visible spectroscopy. The doped films gave a modest but reproducible improvement at the lower annealing temperature. At higher temperatures the advantage largely disappeared, and with my supervisor I reasoned that nitrogen was probably being lost during annealing. I could not confirm this directly because I had only limited access to XPS time. Writing the discussion taught me to separate what my data showed from what I suspected, and to propose the measurements that would settle the question. I would like to study surface characterisation properly so that next time I can answer that kind of question myself.

The pool job has developed skills that a lecture course does not. When readings drift unexpectedly, I work through possible causes in order: reagent age, sampling point, dosing pump faults, bather load. I keep careful records because colleagues on the next shift depend on them, and I have learned to explain clearly to a duty manager why the pool needs to close for superchlorination. I also completed a pool plant operations certificate, which covered the safe handling of sodium hypochlorite and acid dosing systems.

Outside chemistry, I play second clarinet in a community wind band. Rehearsals have little to do with science, but preparing a difficult passage over several weeks is not unlike lab work: slow, repetitive practice that suddenly comes together. I also help organise the band's music library, which has made me unexpectedly fond of a well-labelled filing system.

For my Masters I hope to deepen my understanding of heterogeneous catalysis, particularly how surface structure and defects control activity, and to gain hands-on experience with characterisation techniques beyond those available to undergraduates. I am also keen to work in an international research environment, where I expect to learn as much from colleagues' approaches as from formal teaching. In the longer term I am considering a PhD or a research role in materials for water treatment, an area where my lab and work experiences meet. I would bring careful experimental habits, persistence with difficult material and a practical respect for chemistry that has to work outside the flask.