Seminar
343
content of 6.65% (w/w) and asked to determine total fat matter in it. The two
methods used (A and B) provided the following results:
• Method A: 5.10,5.23,5.24,5.31,5.32,5.38,5.38,5.39,5.49,5.50,5.59,5.70,
5.71,5.79,5.91.
• Method B: 5.41,5.61,5.63,5.63,5.65,5.67,5.69,5.69,5.70, 5.70, 5.70, 5.71,
5.85,5.95,6.15.
• Discussion
• Calculate the z-score for each participating laboratory.
• Compare the accuracy of the two methods.
Seminar 8.4
Accreditation of an Analytical Laboratory
• Learning objective
To describe in detail the process followed to accredit an analytical chemical
laboratory and discuss the impact of accreditation on analytical quality.
• Literature
• CGA-ENAC-LE (1997). General Criteria for Accreditation. Technical Qualification of Testing Laboratories.
• PE-ENAC-LEC-01 (1997). General Procedure for Accreditation of Testing
and Calibration Laboratories.
• G-CGQ (1994). Guide to the Accreditation of Laboratories Conducting
Chemical Tests.
• ISO Guide 58. Calibration and Testing Laboratory Accreditation Systems.
General Requirements for Operations and Recognition.
• "Accreditation and Quality Assurance in Analytical Chemistry", H. Giinz1er (Ed.), Springer, Berlin, 1994.
• Topics for debate
• Characteristics of the accreditation body.
• Documents pertinent to the process.
• Requirements to be eligible for accreditation.
• Accreditation process.
• Auditors.
• Rights and duties of an accredited laboratory.
• Post-accreditation actions.
• International bodies concerned with voluntary and "forced" accreditation.
• Nature of audits; qualitative and/or quantitative.
• Benefits of accreditation.
• Accreditation in the context of analytical quality.