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Updated: May 21, 2025
Concentrate the solution of meconic acid, allow a portion to crystallize, and apply tests. Tests. Morphine and its acetate give an orange-red colour with nitric acid, becoming brighter on standing; decompose iodic acid, setting free iodine; with perchloride of iron, gives a rich indigo-blue; with bichromate of potassium, a green turning to brown.
Meconic acid gives a blood-red colour with perchloride of iron, not discharged by corrosive sublimate or chloride of gold. The similar colour produced by sulpho-cyanide of potassium and perchloride of iron is discharged by chloride of gold and corrosive sublimate. =Morphine Habit.= Individuals who have acquired this habit take the drug usually by hypodermic injection.
Meconic acid, C H O , which is found in opium in combination with the different bases, has also been investigated. By acting upon meconic acid with ammonia, comenamic acid is formed, and this latter, when heated with zinc dust, yields pyridine. If we go now to the cinchona alkaloids, we meet with exceedingly interesting results.
In conditions of collapse, however, this treatment must not be continued, but everything should be done to preserve the strength. Treatment must be continued as long as life remains. Method of Extraction from the Stomach. Opium itself cannot be directly detected, but we test for morphine and meconic acid.
The solution of acetate of morphine may be freed from excess of lead by hydrogen sulphide and filtered, excess of hydrogen sulphide driven off by heat, and tests applied. Put the meconate of lead with water into a beaker and pass hydrogen sulphide; sulphide of lead is formed, and meconic acid set free. Filter.
The same drug contains a peculiar acid called the Meconic; and a vegetable alkali named Narcotine, to which unpleasant stimulating properties are attributed by Majendie. Why is sugar so generally found in plants?
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