Talk:Dille–Koppanyi reagent

"To presumptively identify"
What does it mean that the test 'presumptively' identifies barbiturates? In particular presumption means "an idea that is taken to be true on the basis of probability. as in "underlying presumptions about human nature" ". Does this mean that the test is only probabilistic? Why is the test only probabilistic? If it is probabilistic, what is the accuracy (eg: 95%), and the chance of false positives and false negatives?

Combination with taste & smell tests
If one wants to be sure that they have a sample of Pentobarbital in front of them, for instance, and they test the sample by using the Dille-Koppanyi reagent AND tasting it (verifying that it is bitter and quite foul), what other substances will TASTE and SMELL the same way after passing the Dille-Koppanyi test?

"The test turns phenobarbital, pentobarbital, amobarbital and secobarbital light purple"
Is there a comprehensive list of Barbiturates that the Dille–Koppanyi reagent responds positively to? Is the article saying that ONLY phenobarbital, pentobarbital, amobarbital and secobarbital cause the test to become light purple - or are there other substances/barbiturates that also have the same effect?

Sorry about the points, but I am hoping that the article can be made more definitive and that 'grey areas' can be removed. Some questions : 1) How thoroughly has Dille–Koppanyi reagent been tested (if it was developed in the 1930s, the list of Barbiturates that register positive to the test, and whether there are any Barbiturates that DON'T register with this test. 2) Are there modifications to the Dille–Koppanyi reagent that can test whether a specific sample is (i) phenobarbital OR (disjointly) (ii) pentobarbital OR (disjointly) (iii) amobarbital OR (disjointly) (iv) secobarbital? ie: Are there variations which can test for specific barbiturates (turning one colour for phenobarbital, another colour for pentobarbital, etc...?).

ASavantDude (talk) 12:00, 13 August 2015 (UTC)

'Modified' Dille-Koppanyi reagents
There are 'Modified' Dille-Koppanyi reagents which are available on the market (consider 'NIK® Test C - Barbiturates' which can be Googled). However, what is the nature of the 'Modification'? - from what I can tell, the Dille-Koppanyi test is just a Two-Liquid test (as are most testing kits on the market). So the modification would Appear not to be the number of liquids used in the test. Does the 'NIK® Test C - Barbiturates' use different chemicals, for example? Common Modifications of the Dille-Koppanyi reagents and their consequences should be indicated within the Article. It is possible that the 'Modification' relates to the intensity of the colours produced by the test. ASavantDude (talk) 13:06, 18 August 2015 (UTC)

'Noopept' as FAINT Purple FALSE Negative of Dille-Koppanyi reagent
Dependent upon the intensity of the colour that a law enforcement officer looks for, it should be borne in mind that they may be legal substances (eg: Noopept) which can cause a low intensity PURPLE/LAVENDAR colour to form in the Dille-Koppanyi test. (Conjectural : Noopept also has a Nitrogen within a Carbon ring BUT NOT a Benzene-like ring, which could cause partial complexation). This may inadvertently lead to false positives by the law enforcement officer unless they look for the EXACT colour SHADE required by the test. ASavantDude (talk) 22:23, 18 August 2015 (UTC)