BLOG
KATEGORİDEKİ DİĞER YAZILAR
It is of great importance for food analysis laboratories to produce reliable results, particularly in the detection of process contaminants. Since 3-MCPD esters, which may be present in edible oils, are among the compounds that must be monitored for food safety, the analytical proficiency of laboratories conducting these analyses must be verified.
In this context, proficiency tests (Proficiency Testing – PT) are important quality assurance tools used to evaluate laboratory analytical performance and validate the accuracy of results.
3-MCPD (3-monochloropropane-1,2-diol) esters are compounds that can form during the high-temperature processing of refined vegetable oils. These substances are typically found as fatty acid esters bound to a glycerol backbone.
During digestion, these esters may break down, leading to the formation of free 3-MCPD. For this reason, food safety authorities recommend monitoring 3-MCPD esters in edible oils such as palm oil, sunflower oil, canola oil, corn oil, and soybean oil.
A proficiency test is based on the comparison of analytical results obtained by different laboratories on the same sample. Through these tests, laboratories’ analytical accuracy, measurement precision, method performance, instrument calibration, and personnel competence can be objectively evaluated.
The primary objective of proficiency tests for 3-MCPD esters is to determine whether laboratories produce accurate and comparable results in the analysis of these compounds.
Through these tests, the accuracy of analytical methods is verified, inter-laboratory result consistency is assessed, analytical errors are identified, and the technical competence of laboratories is validated.
Sample Distribution: Homogeneous and stable oil samples prepared by the test organizer are sent to participating laboratories.
Analysis Process: Laboratories analyze the samples using their own routine analytical methods. These analyses typically employ GC-MS (Gas Chromatography – Mass Spectrometry) or GC-MS/MS methods.
Reporting of Results: Laboratories report their analysis results to the proficiency testing organizer within the specified timeframe.
Statistical Evaluation: The results from all participating laboratories are statistically evaluated, and the z-score method is typically used.
Z-Score Evaluation:
|z| ≤ 2: Pass
2 < |z| < 3: Questionable
|z| ≥ 3: Fail
- Validation of analytical methods
- Assessment of measurement uncertainty
- Enhancement of laboratory personnel’s technical competence
- Compliance with international analytical standards
Since 3-MCPD esters are among the process contaminants that must be monitored for food safety, the accurate analysis of these compounds is of great importance. Laboratories’ participation in proficiency tests enhances the reliability and comparability of the analysis results obtained.
Proficiency tests for the determination of 3-MCPD esters in edible oils serve as a vital quality assurance tool for evaluating the analytical performance of food analysis laboratories.
Follow us on LinkedIn for the latest news and updates about our services.
Follow our Instagram account to stay updated on our latest blog posts.
