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Quantitative chromatographic analysis by Thomas E Beesley; Benjamin Buglio; Raymond P W Scott

By Thomas E Beesley; Benjamin Buglio; Raymond P W Scott

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Due to the hazardous nature of such materials the volume or mass of material taken for analysis should be kept to the minimum required. Solid Sampling The sampling of solids is far more difficult than sampling liquids or gases as much larger sampling errors may arise due to the lack of uniformity of the material. In table 1, a guide is given for the minimum amount of sample that should be taken related to total size of the bulk material. 5 4 6 10 15 25 40 60 If the uniformity of the bulk is found to be particularly large (a delivery of iron ore), then the sample quantities will have to be increased.

Figure 11 Sample Quartering The sample is placed on a clean impervious surface and formed into a cone by shoveling. Each shovelful is placed on the top of the last so that the material runs down the side of the pile and is thereby distributed around the sides of the pile as evenly as possible. If larger pieces of material roll away from the base of the cone, they must be pushed back to the edge. From the first cone two successive cones are Copyright © 2001 by Taylor & Francis Group, LLC Sample Collection, Transport and Storage 43 made in the same manner.

21. T. E. Beesley and R. P. W. Scott, Chiral Chromatography, John Wiley and Sons, Chichester-New York (1998). 22. R. P. W. , New York, (1995)19. Copyright © 2001 by Taylor & Francis Group, LLC Sample Collection, Transport and Storage 21 Chapter 2 Sample Collection, Transport and Storage Sampling methods can be broadly separated into three groups based on the physical form of the specimen, viz. gases, liquids and solids. Each type obviously demands quite different sampling techniques. In addition, within each sample type, the sampling method will also vary, depending on the level of the components of interest.

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