Bonded laboratories are laboratories that have been formally certified by an accrediting body, such as the American Society for Testing and Materials (ASTM). These laboratories are required to meet certain standards of quality and safety, and are subject to regular inspections and audits. Bonded laboratories typically have more stringent requirements for their staff and equipment, and are more likely to have specialized expertise in their field.
Non-bonded laboratories are laboratories that are not certified by an accrediting body, and therefore do not have to meet the same standards of quality and safety as bonded laboratories. These laboratories may still be highly qualified and experienced, but they do not have the same level of oversight as bonded laboratories. Non-bonded laboratories are often less expensive than bonded laboratories and may be more suitable for certain types of research or testing.
The main difference between bonded and non-bonded laboratories is the level of oversight and quality assurance. Bonded laboratories are subject to regular inspections and audits, and have to meet certain standards of quality and safety. Non-bonded laboratories do not have the same level of oversight, and may not have the same level of expertise or experience.