Built-in Robustness in Method Procedure.The following are some suggestions
to improve method robustness:
žWeighing error. Weighing error is usually the main source of error. Analyt-
ical procedure should ask for a weighing sample or standard of more than
10 mg to minimize weighing error. In addition, use two to three indepen-
dent weighings in the standard curve and verify the nominal responses of
these standard preparations to ensure that there is no significant weighing
error. Alternatively, use area percent calculation to eliminate the need for
weighing a small quantity of reference standard. |
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