Chemical analysts can work in a wide range of different jobs. In industry, they might be involved in quality control, testing products or packaging for structural and chemical integrity on an ongoing basis. Another industrial role for chemical analysts is monitoring pollution levels to ensure that emission levels are within acceptable limits. In medicine, the related field of biochemistry has a role in diagnosis and treatment of disease. Forensic chemistry relates the field to law enforcement, using the principles of chemistry to provide information that can be used as evidence in criminal investigations.