The preliminary test before doing a hydroxamic acid test is to eliminate all phenols and enols that would give a false positive result when testing an unknown compound. Simply put, if using ferric hydroxamate, any color other than yellow will disqualify this test.
Preliminary Scholastic Aptitude Test. The SAT part was shortened from Scholastic Aptitude test in 1993.
to test for aids
A test done before to compare with later tests.
The preliminary results of the test were negative, but later results told a different story.
THC positive.
psat test score PSAT, the Preliminary Scholastic Assessment Test
no, it can only detect the alcohol
A premininary trial is done before hand to show the effectiveness of a method.
It is a trial run before your accurate test
maybe ask someone
If you fail a preliminary urine test in upon entrance into the army when can you retest?