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PhD Scholarship in Analytical Chemistry Focusing on Quantitation of Suspects From Non-targeted Lc/hrms Analysis Via Predicting Ionisation Efficiencies

Stockholm University has an opening PhD position in environmental sciences. The initial contract for this position is four years. The deadline to apply is April 23, 2019.

The Department of Environmental Science and Analytical Chemistry (ACES) is one of the biggest departments at the Faculty of Science. The department is divided into five units with more than 200 researchers, teachers, doctoral students and technical/administrative staff. Research and teaching focuses on Contaminant Chemistry, Exposure & Effects, Atmospheric Science, Biogeochemistry and Analytical Chemistry. As an employee at ACES you will be part of a dynamic environment with research in leading research areas and with a strong international profile.

Research at the Analytical Chemistry Unit is focused on developing advanced analytical techniques and methods for the determination of small organic compounds and biomolecules. This includes the entire analytical chain, from sampling, clean-up, chromatography and other efficient separation methods, to detection methods such as mass spectrometry, as well as quantitative and qualitative data analysis. The unit is responsible for the two-year Master's programme in analytical chemistry, and for teaching basic level courses in analytical chemistry in the chemistry candidate programme.

Project description

The aim of this project is to obtain quantitative information for the non-targeted analysis carried out with liquid chromatography high resolution mass spectrometry (LC/HRMS). LC/HRMS is the method of choice for identifying any new contaminants in exposure samples, environmental samples, foods, etc. Currently, absolute quantitation of any of the compounds is via external standard substances due to the fact that different compounds ionize to a different extent in the electrospray ionization (ESI) source connecting LC and HRMS. In this project the candidate will tackle this shortcoming by predicting the ionization efficiencies of the compounds identified. Lately, a set of approaches to predict ionization efficiencies and then use these to provide concentrations has been proposed. The candidate will focus on applying this ionization efficiency prediction model to some emerging fields of application in environmental analysis and transformation product analysis. The project also involves a significant amount of using data science tools to quantify the results of non-targeted screening. Qualification requirements

To meet the general entry requirements, the applicant must have completed a second-cycle degree, completed courses equivalent to at least 240 higher education credits (HEC or ECTS), of which 60 credits must be in the second cycle, or have otherwise acquired equivalent knowledge in Sweden or elsewhere. In order to meet the specific entry requirements, for doctoral studies in Analytical Chemistry, the applicant must have a university degree at the first cycle level containing courses of at least 90 HEC in Chemistry, at least one 15 HEC course at the second cycle in Analytical Chemistry and at least a 30 HEC thesis project at the second cycle level in Analytical Chemistry. A very good command of oral and written English is required.

Additionally, practical experience with liquid chromatography and mass spectrometry measurements are required. Experience with some programming language (R, Python, etc.) is a merit and willingness to learn data science tools is expected. Experience in sample preparation techniques (such as LLE, SPE) and data processing (quantitation as well as library search) would be an asset.

The qualification requirements must be met by the deadline for applications.

Selection

The selection among the eligible candidates will be based on their ability to successfully pursue the research education. Special emphasis is put on the applicant's knowledge and skills within the subject area, ability to express her/himself verbally and in writing, analytical aptitude, creativity, initiative and independence, and a capacity for working together with others. The evaluation will be made based on the relevance of past education and experience, grades from previous university courses (in particular at the advanced level), the quality and ambition of the independent project work, references, a cover letter motivating the candidate's interest, and interviews. Short-listed candidates may be asked to provide a short writing sample in English.

Admission Regulations for Doctoral Studies at Stockholm University are available at: www.su.se/rules and regulations.

Only a person who will be or has already been admitted to a third-cycle programme may be appointed to a doctoral studentship. The term of the initial contract may not exceed one year. The employment may be extended for a maximum of two years at a time. However, the total period of employment may not exceed the equivalent of four years of full-time study.

Doctoral students should primarily devote themselves to their own education, but may engage in teaching, research, and administration corresponding to a maximum of 20 % of a full-time position.

Please note that admission decisions cannot be appealed.

Stockholm University strives to be a workplace free from discrimination and with equal opportunities for all.

Contact

For more information, please contact Associate professor Anneli Kruve, telephone +372 5858 3895, anneli.kruve@ut.ee or Professor Cynthia de Wit, telephone: +46 70 888 71 80, cynthia.dewit@aces.su.se. Application

Apply for the PhD student position at Stockholm University’s recruitment system. It is the responsibility of the applicant to ensure that the application is complete in accordance with the instructions in the job advertisement, and that it is submitted before the deadline. Please include the following information with your application

and, in addition, please include the following documents


Summary:

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