Determination of nitrofurantoin in urine by second derivative spectrophotometry

Key words: 
• Nitrofurantoin /
• Second derivative spectroscopy /
• Urinary

Abstract: The paper teported the determination of nitrofuratoin in urine by second derivative spectroscopy. The method consists of direct extraction of the drug by the use of ethyl acetate from the acidic urine and determination of the nitrofurantoin concerntration by measuring the amplitude between the maximum and minimum of the second derivative signal at 374-377nm. The method had a detection limit of 1.5mg/L with recovery of 98% and RSD was less than 3%. The both methods of second derivaive and HPLC had notable relativity.The method could apply to the pharmacokinetics study of nitorfurantoin.