As a non geologist I was wondering if anyone could answer the...

As a non geologist I was wondering if anyone could answer the question, are all assay lab tests generally the same? ie do they test for a standard broad spectrum of minerals or can they specifically test for just one mineral, eg iron, if a customer requests it? ie can we expect quicker results from PLV's Irvine Is drilling than say the more complex minerology holes at Devon/Dove River in Tasmania?