Factors to Consider when Selecting a Method

Having established the purpose of an analysis, a decision needs to be made about which particular analytical procedure to use. 

What factors will influence your choice of method List the factors that could be used to distinguish one method from another. 

The choice of method depends on the purpose for which the analysis is being performed. The customer requesting the analysis may specify the method to be used. Even in this situation, it is the responsibility of the laboratory to demonstrate that the method is capable of producing results that are reliable. When no method is specified the points to consider have already been identified in Section 4.2. The acceptable level of measurement uncertainty specified or implied will, to a certain extent, set the precision and bias levels. All of the topics covered in the following sections may be crucial, depending on the purpose of the analysis, and should appear on your list. 

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