For select sources, largely from the 21st century, SciFinder has added CAS Analytical methods, where the information about the method used has been pulled out into a step-by-step, recipe-style methodology.
From SciFinder, the upper right hand corner, under the 3 dots, click on Analytical Methods to access this tool.
Alternatively, to access from within SciFinder Results
To find the references with this enhancement from a results page when searching for References:
Once you have found a source that looks interesting or like it is likely to have a method you would want to use