Physicochemical Tests for Pharmaceutical Products under GLP
Given the impact of pharmaceutical products on human health, rigorous testing for their quality and safety is imperative. Physicochemical tests, conducted under Good Laboratory Practice (GLP), scientifically confirm the compliance of pharmaceutical products with critical criteria such as identity, purity, moisture content, and microbiological purity. In our GLP-accredited laboratory, we provide our clients with reliable analytical services, performing tests in accordance with the monographs of Ph. Eur. (European Pharmacopoeia) and USP (United States Pharmacopeia).
The Role of Physicochemical Tests under GLP
GLP standards govern the planning, execution, traceability, and reporting of tests, thereby enhancing the reliability of results. This enables manufacturers to conduct quality control of their pharmaceutical products in accordance with international standards and ensure regulatory compliance.
Key Physicochemical Tests We Perform under GLP
• Identification Tests
To confirm that a drug substance or formulation is the correct material, various physical and chemical methods are employed. These include:
- Spectroscopic methods (IR, UV, NMR)
- Chromatographic methods (HPLC, GC)
- Chemical reaction tests.
These tests ensure that the product possesses the identity stated on the label. (Ph. Eur., USP)
• Purity Tests
These tests are conducted to identify potential impurities in the active substance or formulation. They detect undesirable substances such as
- Solvent Residues
- Reaction residues
- Degradation products
They are performed using limit tests or quantitative analytical methods. (Ph. Eur., USP)
• Determination of Water Content
Moisture content directly influences the shelf life and stability of many pharmaceutical products.
- The most common method, Karl Fischer titration, is used to accurately determine the water content in the product. (Ph. Eur., USP)
• Sterility Test
For pharmaceutical products requiring sterility (e.g., injectable solutions, eye drops), tests are conducted to determine the presence of viable microorganisms.
- Sterility tests are performed under aseptic conditions.
- They are conducted in accordance with ISO 11737-2 and pharmacopoeial references. (Ph. Eur., USP)
• Bacterial Endotoxin Test
This test is crucial for parenteral products and certain medical devices:
- It detects pyrogenic bacterial endotoxins.
- It is performed using the Limulus Amoebocyte Lysate (LAL) method. This test ensures that products do not contain substances capable of causing fever after injection. (Ph. Eur., USP)