Validation of UV-VIS Spectrophotometric Methods for Determination of Inulin Levels from Lesser Yam (Dioscorea esculenta L.)

DOI: https://doi.org/10.14710/jksa.21.4.161-165

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Published: 01-11-2018
Section: Research Articles
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Validation of methods is necessary to ensure that the analytical methods used are appropriate and reliable. In this research, the determination of validation method and determination of inulin content from gembili bulb (Dioscorea esculenta L.). The method used for determining inulin levels is UV-Vis spectrophotometry. Based on the results obtained, the maximum wavelength determination of inulin levels is 520 nm. The method of analysis in this study meets the specified validation requirements. These parameters include the equation on the inulin raw curve y = 0.0045x +0.109 with the coefficient of determination 0.9992. The accuracy of the methods tested using the recovery test was 96.14-106.76% at concentrations of 25, 100, and 225 ppm. The intraday precision test is in the range of 2.67-6.82% at the same concentration as the accuracy test. Precision interday equal to 7.41% at concentration 225 ppm for 3 day analysis period. The values of LOD and LOQ are 3.58 ppm and 11.95 ppm, respectively. The concentration of inulin extract from gembili bulb is 840.44-12188.59 ppm.

Keywords

yam (Dioscorea esculenta L.); inulin; UV-Vis spectrophotometry; validation method

  1. Sandra Ayu Apriliyani 
    Department of Chemistry, Satya Wacana Christian University Salatiga, Indonesia
  2. Yohanes Martono  Scopus Sinta
    Department of Chemistry, Satya Wacana Christian University Salatiga, Indonesia
  3. Cucun Alep Riyanto 
    Department of Chemistry, Satya Wacana Christian University Salatiga, Indonesia
  4. Mutmainah Mutmainah 
    Sekolah Tinggi Ilmu Farmasi Semarang, Indonesia
  5. Kusmita Kusmita 
    Sekolah Tinggi Ilmu Farmasi Semarang, Indonesia
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