May 5th, 2015
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Introduction, sampling and sample preparation in laboratory.. Precaution during preparation

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Introduction : Furosemide, 4-chloro-N-furfuryl-5-sulfamoylanthranilic acid is a drug which is used to reduce extra fluid in the body With congestive heart failure, liver disease, or a kidney disorder such as nephrotic syndrome. It is a loop diuretic (water pill) which prevents our body from absorbing too much salt, allowing the salt to instead be passed in your urine. Fig 1 : Stucture of Furosemide Furosemide is a white to slightly yellow crystalline powder, odorless. It is soluble in more polar organic solvent like acetone, sparingly soluble in ethanol and insoluble in water. furosemide is commercially available as a injection, oral solutions and tablets in many countries.Preparation of FurosemideMethod- Furosemide can be prepared from 4,6-dichlorobenzoic acid-3-sulfonylchloride via a multistep synthesis involving the sequential addition of ammonia and 6-furfurylamine.Interferences 1)This method produce in high yield of Furesomide 2)This method produce the sample less then 10% moist. Higher moisture content in Furesomide samples will alter the effective acid concentration in the sample which pH values should be 3.8 to 7.8.3)This method is effective , less time consuming and less hazardous method. Apparatus1.Large table for sample preparation 2. Convection oven capable of maintaining 80 5C for drying reaction flask and reagent 3 . Chi

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