Analytical Services International
Bioanalysis and Toxicology You Can Trust
Analytical Services International (ASI) is an accredited bioanalysis and toxicology laboratory based at City St George's, University of London. For over three decades, we have provided accurate, timely and insightful scientific analysis.
Our work helps coroners, law enforcement, clinicians, pharmaceutical organisations and academic partners make informed decisions with confidence.
We combine advanced mass spectrometry with the expertise of highly skilled scientists who understand the importance of clear data and meaningful interpretation. Our commitment to quality underpins everything we do and is supported by ISO/IEC 17025:2017 accreditation along with MHRA Good Laboratory Practice (GLP) and Good Clinical Practice (GCP) compliance.
Our services
Clinical Trial Bioanalysis
We support pharmaceutical companies, biotech organisations and Contract Research Organisations (CROs) with high quality small molecule clinical bioanalysis. Our experience includes pharmacokinetics, metabolite profiling, biomarker analysis, dry blood spot bioanalysis and bespoke assay development. With an assay library of more than 250 small molecule compounds and experience across more than 500 studies, we help research teams progress confidently through each stage of development.
We also support early-stage and exploratory research programmes involving emerging therapeutic areas. This includes bioanalytical support for psychedelic compounds such as Ketamine, Psilocin, DMTs and LSD, where accurate quantification and method development are required to support research projects and proof of concept studies. Our scientists work closely with research teams to deliver robust analytical data that supports safe, well-designed studies.
All work can be carried out under GLP and GCP compliant conditions using state of the art mass spectrometry
Expert Witness Services
Our experienced experts produce clear, independent reports for criminal and civil cases. We explain toxicological findings in the context of each case and provide courtroom testimony when required. Our work is recognised for its clarity, accuracy and credibility.
Forensic Toxicology
Our forensic toxicology team provides detailed analysis and interpretation for coroners, pathologists, police forces and legal professionals. We offer comprehensive LC-MS/MS and high-resolution mass spectrometry testing, including specialist assays for insulin, C peptide, GLP-1 agonists and other compounds relevant to complex or unusual cases.
As part of our expansion programme, we also provide drug testing services. This allows for the rapid identification of seized materials and unknown substances, supporting investigations, public protection and law enforcement decision making. All results are delivered with clear and defensible interpretation, and expert witness testimony is available when required.
Therapeutic Drug Monitoring
We provide therapeutic drug monitoring services to healthcare providers across the UK and Ireland. Our assays cover antipsychotic drugs, immunosuppressants and cardiac drugs. Results are produced within clinically relevant timeframes, and our dedicated encrypted microsite allows clinicians to access clozapine results securely and review patient trends.
Why Choose ASI?
Clients choose ASI for our scientific expertise, our investment in advanced instrumentation and our commitment to quality. We are trusted for our accuracy, our responsiveness and our ability to interpret results in a way that brings clarity to complex situations. As part of Analytical Expert Labs, we offer access to specialist knowledge across the forensic spectrum while maintaining the high standards and personal service that have defined ASI for more than 30 years.
Our Mission
Our mission is to provide high quality, trusted bioanalysis and toxicology services that support justice, healthcare and scientific progress.
Our Vision
Our vision is to be a leading analytical partner for organisations that require reliable, evidence based scientific support.
Our Heritage
ASI was founded more than 30 years ago with a focus on improving the quality and reliability of toxicology and analytical science.
Our People
Our scientists, analysts and technical specialists are central to our success. We are proud to have a team that values curiosity, collaboration and continuous learning.
Careers & Vacancies
At ASI we believe that high quality science is achieved by supporting the people who deliver it. Our work relies on the skills, dedication and curiosity of our team, and we are always interested in hearing from individuals who share our commitment to scientific excellence.
New & Insights
Stay up to date with the latest developments, expert insights and evidence-led research.
Get in Touch
We welcome enquiries from new and existing clients. Whether you require toxicology support, clinical bioanalysis, therapeutic drug monitoring or expert interpretation, our team is here to help.
What people say about us
“Our pharmacokinetic research collaboration with ASI was seamless from consultation to reporting. The team demonstrated clear expertise, arranged efficient sample logistics and delivered results within our research timeframe.”
“We have worked with ASI for over 20 years. The team is responsive, knowledgeable and reliable, delivering high-quality services at good value.”
“ASI developed and validated our pharmacokinetic assay to a high scientific standard. The work was delivered on time and with clear scientific rigour.”
“We would confidently recommend ASI to others and look forward to future collaborations. Their consistent communication, responsiveness and commitment to quality have been invaluable.”
“ASI supported our large-scale research study with professionalism and flexibility. Their responsiveness during an extended data collection period was particularly valued. We would be pleased to work with them again.”
“Across two clinical trials, ASI delivered accurate and efficient bioanalytical services. Their commitment to quality reporting was evident throughout.”
“It has been a genuine pleasure working with ASI. We would not hesitate to recommend them and hope to collaborate again in future.”
Get in Touch
We welcome enquiries from new and existing clients. Whether you require toxicology support, clinical bioanalysis, therapeutic drug monitoring or expert interpretation, our team is here to help.
General Enquiries & Helpline
info@bioanalytics.co.uk
+44 (0)20 8725 2405