Potassium iodide Theophylline

This experiment describes the quantitative analysis of the asthma medication Quadrinal for the active ingredients theophylline, salicylic acid, phenobarbital, ephedrine HGl, and potassium iodide. Separations are carried out using a Gi8 column with a mobile phase of 19% v/v acetonitrile, 80% v/v water, and 1% acetic acid. A small amount of triethylamine (0.03% v/v) is included to ensure the elution of ephedrine HGl. A UV detector set to 254 nm is used to record the chromatogram. [Pg.612]

Quadrinal Tablets—theophylline, theophylline calcium salicylate, ephedrine HC1, potassium iodide, phenobarbital... [Pg.680]

Rx with potassium iodide, phenobarbital, theophylline (Quadrinal), with hydroxyzine, theophylline (Hydrophed DF, Marax-DF) with guaifenesin (Broncholate, Ephex SR)... [Pg.433]

The starting point for his synthesis was N,]SF-dimethylurea, the reaction of which with malonic acid gave N,N-dimethylbarbituric acid. With nitrous acid (sodium nitrite and a mineral acid) he produced dimethylvioluric acid, which gave dimethylpseudouric acid upon reduction and further reaction with potassium cyanate. Ring closure by heating with hydrochloric acid then led to 1,3-di-methyluric acid. [518] Its reaction with phosphorus pentachloride and reduction with hydrogen iodide then produced the supposed theophylline final... [Pg.477]

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