For a long time ,if one wants to know the number of opium chests exported to China ,the fourth and the fifth tables of the International Relations of Chinese Empire written by an American, Morse, are academic authority.
Emotional evaluation of short musical fragments was compared for healthy people, patients with endogenous or neurotic depression, and opium addicts with affective disorders.
Using gas chromatography, the alkaloids morphine, codeine, thebaine, papaverine and narcotine contained in opium extract have been identified and quanti-fied as free bases in one step without derivation.
For this purpose, accurately weighed amounts of opium extract and internal standard are prepared according to the method described, and an aliquot part of the resultant solution is subjected to gas chromatography under defined conditions.