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Ehrlich's reagent, also known as the "DMAB test", is a chemical test to presumptively identify indoles. It is primarily used as a simple spot-test to identify possible psychoactive compounds such as tryptamines (e.g. DMT) and ergoloids (e.g. LSD). The reagent will also give a positive result for opium, despite the opiates not containing the indole functional group, because of the presence tryptophan in natural opium. The reagent is prepared by dissolving 0.5-2.0 g of ''p''–dimethylaminobenzaldehyde (DMAB) in 50 mL of 95% ethanol and 50 mL of concentrated hydrochloric acid and is best used when fresh. Other alcohols such as 1-Propanol can also be used to prepare the ehrlich reagent. The ehrlich reagent is similar to a number of other indole tests: * The van Urk reagent which uses DMAB, sulphuric acid and an oxidant. * The Renz and Loew reagent which uses p-dimethylaminocinnamaldehyde and may also be used for the detection of flavonoids. * The "improved hallucinogen reagent" which uses 5 g DMAB in 100 mL concentrated phosphoric acid (specific gravity 1.75) and 100 mL of methanol.〔 ==See also== * Pill testing * Liebermann reagent * Froehde reagent 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ehrlich's reagent」の詳細全文を読む スポンサード リンク
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