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By F. Sherwood. Taylor

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The operating procedures (SOPs) drawn up should include statements about the responsibilities of the co-ordinator, test organiser, personnel and quality control. ) and equipment (hardware and software), servicing and restoring functionality after system failures. Particular care should be taken in the treatment and archiving of data. If computerised systems are used for collecting and processing raw data, creating reports or storing raw data, the system should be designed in such a way as to allow the generation and storage of a complete audit trail at all times, so that all changes in the data may be reproduced without the original data being made unrecognisable.

The substance is extracted from the adsorption material by shaking the tube on a laboratory shaker for 10 minutes. 20 µL of the acetonitrile solution is then injected without further processing into the high performance liquid chromatograph for separation. In each analysis series a reagent blank is prepared and analysed in the same way. 3 minutes (see Figure 1). 5 Analytical determination Under the conditions described above, 20 µL of the acetonitrile solution is injected into the high performance liquid chromatograph using an injection loop.

Staub-Reinh. ) (1998) Analytische Methoden zur Prçfung gesundheitsschådlicher Arbeitsstoffe, Luftanalysen. -11. , WILEY-VCH-Verlag, Weinheim [24] Stanetzek I, Giese U, Schuster RH, Wçnsch G (1996) Chromatographic characterization of adsorbens for selective sampling of organic air pollutants. Am. Ind. Hyg. Assoc. J. 57: 128±133 Authors: U. Giese, R. -H. Pannwitz, M. Tschickardt Analyses of Hazardous Substances in Air,Volume 6. 5 Quality control Analytical parameters Accuracy Sensitivity Selectivity and specificity Recovery Statistical parameters Reproducibility and comparability Detection limit Quantification limit Quality control Testing analytical procedures Quality control cards and control samples Control samples Monitoring the procedure Monitoring the procedure with quality control cards Shewhart control card Control cards for some control parameters Quality control of data collecting and processing systems Validation of computerised systems Documentation Archiving References 1 Quality control The purpose of quality control is to check that the analytical procedure functions correctly during routine use.

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