Download A Primer on Quality in the Analytical Laboratory by John Kenkel PDF

By John Kenkel

Contemporary commercial laboratory analyst encounters concerns akin to quality controls, caliber coverage ISO 9000, average working systems, calibration, typical reference fabrics, statistical keep watch over, keep watch over charts, skillability checking out, validation, method suitability, chain of custody, solid laboratory practices, protocol, and audits. In a well-written and readable type, A Primer on caliber within the Analytical Laboratory presents an creation to caliber, criteria, and rules within the analytical laboratory and serves as a priceless source to a myriad of laboratory practices.Features

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Example text

2) Test system care. (3) Receipt, identification, storage, handling, mixing, and method of sampling of the test, control, and reference substances. (4) Test system observations. (5) Laboratory or other tests. (6) Handling of test systems found moribund or dead during study. (7) Necropsy of test systems or post-mortem examination of test systems. (8) Collection and identification of specimens. (9) Histopathology. (10) Data handling, storage and retrieval. (11) Maintenance and calibration of equipment.

Validation: Validation was defined in Section 3. It is the process of evaluating a method, an instrument or other piece of equipment, a standard material, etc. to determine whether it is appropriate for the work at hand and whether it will meet all expectations and needs for a given analysis. For example, an analyst may propose that a new gas chromatograph, one that has a new design of electron capture detector, be used for a certain pesticide analysis performed in the laboratory. A validation process would involve testing the new instrument (alongside the unit currently used in the procedure) with standards and samples used in the analysis to validate whether the new unit will perform up to the standards that have been set for the work.

Thus, while one may choose the ICP method mentioned above because of its lower detection limit, it may still not be a good choice because of an uncompensatable bias at the concentration level in question. It is appropriate to always check the method using a reference material, or by using an alternative method, to determine bias. Also, a bias can be caused by some correctable component of the analysis scheme, such as sampling problems or contamination, and not the method itself. 2 is not without limits.

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