Materials traceability

Accuracy, uncertainty, and traceability. A certified value is the best approximation of the true concentration of the analyte. During the certification process, a variety of analytical methods may be used to determine this true value. Uncertainty estimates ultimately based on this process, together with information about the material s homogeneity can give a certified reference material traceability, needed for true international comparability. 

Among the elements of quality control in mycotoxin analysis, proficiency tests, control materials (reference materials and certified reference materials), traceability in spiking, and recovery checks have been demonstrated to be particularly relevant. 

Key words Reference materials Traceability Chemical identification Amount of substance... 

Key words Certification Gravimetric analysis Measurement Measurement uncertainty Reference material Traceability... 

Keywords Reference material Traceability Total protein Stress indicators... 

Use of reference materials traceable to SI. In the majority of measurements, the certified reference materials (CRM) traceable to SI are by far the best definable reference points and they are most frequently used as measurement standards in chemical and other measurements. These materials are the means of achieving reliable measurements and they are available from the internationally recognized organizations for a wide range of users. 

Material traceability, which is related to the processing history of a batch. 

Keywords Primary reference materials Traceability system Intercomparison... 

Advice on the composition and formulation of the feed is best left to the nutritionist. A reliable company will provide records of raw material traceability and assurance of compliance with the correct permitted percentage of non-organic fraction. 

Note 7 The specifications of a RM should include its material traceability, indicating its origin and processing [17]. 

Material traceability to an accurate realisation of the unit in which the property... 

Because of the necessity to characterize reference materials traceability in the measurements is very important. In atomic spectrometry background acquisition methods have improved so much that although it is not an absolute methodology, every step in the calibration and in the measurement processes can be extremely well characterized. 

Production control planning, preparation of materials, traceability and calibration, measurement equipment and methods, assessment of homogeneity and stability, data treatment and certification. 

A broad range of technical requirements is important in a laboratory quality system. These include aspects such as the selection of appropriately qualified and experienced personnel sampling, sample handling and preparation laboratory accommodation and environmental conditions equipment and reagents calibration reference standards and reference materials traceability (of standards and of samples) the selection or development, validation, and control of methods estimation of the uncertainty of measurements reporting of results and quality control and proficiency testing. 

Standards Instrument Calibration Reference Materials Traceability Laboratory Information Management Systems. 

See also-. Quality Assurance Quality Control Primary Standards Interlaboratory Studies Reference Materials Traceability. 

Principles and Characteristics With today s multitude of regulations, customers demand the manufacturing and testing history of formulations, i.e. data specific to the raw materials used in the product, the manufacturing process, and the finished product inspection or testing steps. The combination of this data is widely known as the pedigree, and must include all data specific to the trace-ability, characterisation, manufacturing, and inspection of a commercially produced reference material. Traceability is defined as property of the result of a measurement or the value of a standard... 

Certification of polymeric reference materials (traceability to the SI unit system)... 

Inspection of incoming material traceable to material and test certificates... 

There are two schemes in practice to verify and validate a laser diffraction instrument and its measmement. One is to use either reference materials (national standard or certified reference materials or secondary reference materials traceable to the national reference materials) or the instrument manufacturer s controls [20]. The average of the median size value (d5o)from at least three independent measinements should agree with the certified value of... 

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