Next page concentration effect

Conversely, on occasion, invalid data may still be used for project decisions. In DQA Step 4, the chemist made decisions related to the effects of trip and equipment blank contamination on sample data by applying the logic demonstrated in Example 5.8. In DQA Step 6, this decision logic will be extended further to compare the contaminants of concern concentrations in the samples to the action levels as demonstrated in Example 5.12 on the next page. 

Figure 11. Vertical mixing effects on the computed concentration/depth profiles for pentachlorophenol and trifluralin (metalimnion at 25 meters) (a) moderately productive water, low winds (5 m/s). Continued on next page.

To find the values of m and n, we run a series of experiments in which one reactant concentration changes while the other is kept constant, and we measure the effect on the initial rate in each case. Table 16.2 on the next page shows the results. 

The enthalpy of association and corresponding equilibrium constant can be determined optically. (The Fe " content is responsible for the red colour of the crystals, cf. Sections 5.7 and 6.5.) Fe i does not possess an effective defect-chemical charge the actual Fe " " concentration ([FeTj]) entering the electroneutrality relationship is a function of P02, T and the total iron content C, which, as before, is constant. These valence changes are special cases of association reactions, which are dealt with systematically in the next section (see page 204). 

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