Advanced screening & prioritisation of emerging contaminants in food chains

Sveriges Lantbruksuniversitet; Uppsala kommun; Presencial; SEK 357 120 - 468 720; Tempo integral

Resumo da oferta

The Department of Aquatic Sciences and Assessment in Sweden invites applications for a doctoral student to advance understanding of contaminants of emerging concern in food chains.

The project focuses on bioaccumulation, trophic transfer and advanced chemical screening, developing analytical workflows for detection of known and unknown compounds in complex matrices, including sample preparation and HRMS data handling.

Qualificações

• Masters degree in analytical/ environmental chemistry or related field.
• Experience with LC-MS/HRMS and GC-MS is valued.
• Experience with suspect and non-target screening is desirable.
• Ability to work independently and in teams.

Responsabilidades

• Prepare biological/environmental samples and extract/analyze target and non-target compounds.
• Process large HRMS datasets and perform data analysis/statistical evaluation.
• Interpret chemical patterns in relation to environmental sources and collaborate with partners.
• Contribute to scientific manuscript writing in English.

Conhecimentos

Data analysis

Python/R

Independent work

Formação académica

MSc in analytical chemistry / environmental chemistry / chemistry / ecotoxicology / environmental science / food science

Ferramentas

LC-MS

LC-HRMS

GC-MS

Descrição da oferta de emprego

Department of Aquatic Sciences and Assessment

Third-cycle subject area: Environmental assessment, specialising in environmental chemistry.

Description of the doctoral project

This doctoral project aims to improve the understanding of contaminants of emerging concern in food chains by using bioaccumulation and trophic transfer as a strategy for chemical prioritisation. The project will investigate how contaminants move from environmental sources into organisms and through food chains, and how these processes can be used to identify substances of relevance for ecosystems and One Health. It will focus on one or more selected food‑chain systems, depending on sample availability, collaborations and scientific relevance.

The project includes:

• Selecting relevant food‑chain systems, biological matrices and contaminants of emerging concern based on occurrence data, chemical properties, bioaccumulation potential and available samples.
• Applying target, suspect and non‑target screening using LC‑HRMS to identify known and previously unknown substances in selected biological matrices.
• Assessing bioaccumulation, biomagnification and trophic transfer patterns where suitable data and samples are available.
• Using environmental specimen bank samples, where available, to investigate time trends and support retrospective screening.
• Connecting measured chemical patterns to possible environmental sources.

You will work in an international, interdisciplinary team. The project provides access to advanced instrumentation and training in data analysis, scientific communication, and collaborative research.

About the position

We are seeking a PhD student who will advance the understanding of contaminants of emerging concern in food chains, with a particular focus on bioaccumulation, trophic transfer and advanced chemical screening. To achieve this aim, you will develop and apply analytical workflows for the detection and identification of known and previously unknown compounds in complex biological matrices, including sample preparation, extraction and clean‑up strategies.

The project will also include semi‑quantitative analysis of detected compounds and the assessment of bioaccumulation, biomagnification and trophic transfer patterns in selected food‑chain systems. Where suitable samples are available, environmental specimen bank material may be used to investigate time trends and support retrospective screening. Your duties also include preparation of biological and environmental samples, extraction and analysis of target and non‑target compounds, processing of large HRMS datasets, data analysis, statistical evaluation, interpretation of chemical patterns in relation to environmental sources, collaboration with national and international partners, and scientific manuscript writing in English.

Requirements

To meet the general entry requirements you must have been awarded a second‑cycle (Master's) qualification, satisfied the requirements for courses comprising at least 240 credits of which at least 60 credits were awarded in the second‑cycle, or acquired substantially equivalent knowledge in some other way in Sweden or abroad (Higher Education Ordinance1993:100, Chapter7, Section39).

Specific entry requirements for the third‑cycle courses and study programme in environmental assessment, specialising in environmental chemistry:

• Knowledge of aquatic ecology, aquatic biogeochemistry, statistics or ecotoxicology.
• The undergraduate degree must include a degree project.

You must also meet the equivalent English language requirements as those necessary for the Swedish upper‑secondary qualification EngelskaB/6.

Your profile

• Applicants shall hold an MSc in analytical chemistry, environmental chemistry, chemistry, ecotoxicology, environmental science, food science or equivalent.
• Specialisation in chemical analysis of organic contaminants and experience with LC‑MS, LC‑HRMS, GC‑MS or other advanced mass spectrometry techniques are valuable merits.
• Experience with suspect and non‑target screening workflows is highly desirable.
• Previous experience with chemical analytical laboratory work, particularly involving complex biological, food, biota, soil or sediment matrices, is advantageous.
• Knowledge of contaminants of emerging concern, bioaccumulation, biomagnification, trophic transfer or time‑trend analysis is considered a merit.
• Data processing skills using statistical computing, visualisation and data analysis tools (e.g.R, Python or similar) are also considered a merit.
• Strong interpersonal skills, analytical and problem‑solving abilities, accuracy, motivation, and the capacity to work independently as well as in collaboration with others.

Form of employment / Funding

Employment as a doctoral student (4‑year programme).