thanks for the support! The idea behind the test is two-fold:
1. high quality cocaine has less adulterants, which may be harmless, but in some cases have quite dangerous effects. Last year, in Holland, atropine was encountered as an adulterant, which led to quite a few hospitalizations and even death, due to the effects on the parasympathetic ans.
2. what astranges me the most is that the price of coke is not related to quality. It almost always seems fixed to the amount. if you buy, for instance, 1 gram for $50 and it is 80% pure, you actually pay $62.50 per gram(based on 100% purity).
If the same $50 buys you a gram coke that is only 50% pure (which is about average: check:
http://www.unodc.org/pdf/WDR_2004/Chap5_coca.pdf ), you're actually paying your dealer $100 a gram. when you take these margins into account you must be crazy to settle for the lower quality!
you're paying $50 for a half gram of sugar to support your dealer's life style and own habit!.
think about it! and these reasons are besides the fact that adulterated coke does not bring you the desired effects and only contributes to massive hangovers.
As a bonus, the test does not react to other substances such as lidocaine, procaine, meth, amp, mannitol etc. it only reacts to coke!