Aluminum measurements

Barker Fine Structure of Compressive and Release Wave Shapes in Aluminum Measured... 

Figure 4-7 Measurement of Al by 2 methods. [Data from P T. Srlnlvasan, T. Vlraraghavan, and K. S. Subramanlan, Method Development for Drinking Water Aluminum Measurement Using a Graphite Furnace Atomic Absorption Spectrophotometer, Am. Lab., February 2000, p. 76.]...

Savory J, Wills MR. 1986. Analytical methods for aluminum measurement. Kidney Int 29(Supp) S24-S27. 

The galvanic series of metals and alloys in seawater is given in Table 7.20. From this series it is clear that steel and 2024 aluminum are in close proximity. From their positions it is inferred that steel is cathodic and aluminum is anodic in seawater. The corrosion potentials of iron and aluminum measured after immersion in various media for 24 h are given in Table 7.21. It is seen from these data that the corrosion potentials of iron and aluminum are very nearly the same in 0.1M sodium chloride. Some studies on the galvanic action of the steel-aluminum couple in fresh waters such as pure, river, lake and underground water and salt solutions are noted in Table 7.22. In one of the studies, the... 

Table 6. Aluminum measured as an impurity in some substances ...

Parent L, Twiss MR and Campbell PGC (1996) Influences of natural dissolved organic matter on the interaction of aluminum with the microalga chlor-ella a test of the free-ion model of trace metal toxicity. Environ Sci Technol 30 1713-1720. Pejovic-Milic a, Arnold ML, McNeill FE and Chettle dr (2000) Monte Carlo design study for in vivo bone aluminum measurement using a low energy accelerator beam. Appl Radiat Isot 53 657-664. 

The key to the success in aluminum monitoring lies in the availability of accurate and precise analytical methods together with guidelines for contamination-free specimen collection and the performance of quality assurance. Savory and Wills [19,20], Oster and Prellwitz [21], and Taylor and Walker [22] reviewed the analytical methods for the determination of aluminum in biological materials and the problems associated with aluminum measurements, and provided reconunenda-tions for the preanalytical phase and control of contamination. 

Quality assurance in aluminum measurements follows established principles used in all areas of clinical chemistry. Internal quality control materials, usually pooled plasma, at two or three different concentrations should be used on a daily basis. The concentrations of aluminum in these materials should coincide with the levels determined in unknown samples [38,39]. 

It is believed that aluminum plays important roles in the pathology of Parkinson s disease, Alzheimer s disease, and diseases related to dialysis [75-77]. Therefore, a simple, well working direct potentiometric method could gain large-scale application in food analysis. For these, a selective electrode is needed. Being a three-valence ion, relatively less sensitivity is expected for a direct potentiometric aluminum measuring method. Unfortunately, a relatively small number of successful attempts have been reported about the fabrication of appropriate ion-selective aluminum electrodes. 

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