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Volume 22 Issue 5
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Article Navigation >  Journal of Pharmaceutical Practice and Service  > 2004  >  (5): 276-277

GU Wei-ying, ZHANG He-ping, HUANG Wei-fen. Determination of compound benzoic acid tincture by dual-wavelength ratio coef-ficient spectrometry and first derivative spectrometry[J]. Journal of Pharmaceutical Practice and Service, 2004, (5): 276-277.
Citation: GU Wei-ying, ZHANG He-ping, HUANG Wei-fen. Determination of compound benzoic acid tincture by dual-wavelength ratio coef-ficient spectrometry and first derivative spectrometry[J]. Journal of Pharmaceutical Practice and Service, 2004, (5): 276-277.
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Determination of compound benzoic acid tincture by dual-wavelength ratio coef-ficient spectrometry and first derivative spectrometry

  • The Seventh People's Hospital of Shanghai, Shanghai 200137, China

  • Received Date: 2003-12-16
  • Objective To establish a quantitative analysis method for benzoic acid and salicylic acid in compound benzoic acid tincture. Methods The benzoic acid was determined directly at 272 and 301 nm by dual-wavelength ratio coefficient spectrometry. The salicylic acid was determined directly at 318nm by first derivative spectrometry. Results The calibration curve of benzoic acid was linear in the range from 19.34 to 27.08μg/mL with r =0.9999,the average recovery and relative standard deviation were 99.4% and 0.80% respectively. The calibration curve of salicylic acid was linear in the range from 24.48 to 34.27μg/mL with r =0.9999, the average recovery and RSD were 99.6% and 0.49% respectively. Conclusion The method is simple,rapid and accurate.
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Determination of compound benzoic acid tincture by dual-wavelength ratio coef-ficient spectrometry and first derivative spectrometry

  • The Seventh People's Hospital of Shanghai, Shanghai 200137, China
  • Received Date: 2003-12-16

Abstract: Objective To establish a quantitative analysis method for benzoic acid and salicylic acid in compound benzoic acid tincture. Methods The benzoic acid was determined directly at 272 and 301 nm by dual-wavelength ratio coefficient spectrometry. The salicylic acid was determined directly at 318nm by first derivative spectrometry. Results The calibration curve of benzoic acid was linear in the range from 19.34 to 27.08μg/mL with r =0.9999,the average recovery and relative standard deviation were 99.4% and 0.80% respectively. The calibration curve of salicylic acid was linear in the range from 24.48 to 34.27μg/mL with r =0.9999, the average recovery and RSD were 99.6% and 0.49% respectively. Conclusion The method is simple,rapid and accurate.

GU Wei-ying, ZHANG He-ping, HUANG Wei-fen. Determination of compound benzoic acid tincture by dual-wavelength ratio coef-ficient spectrometry and first derivative spectrometry[J]. Journal of Pharmaceutical Practice and Service, 2004, (5): 276-277.
Citation: GU Wei-ying, ZHANG He-ping, HUANG Wei-fen. Determination of compound benzoic acid tincture by dual-wavelength ratio coef-ficient spectrometry and first derivative spectrometry[J]. Journal of Pharmaceutical Practice and Service, 2004, (5): 276-277.
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