Uncertainty of Peroxide Value Determination in Fat in Follow up Formula

성장기용 조제식에 함유된 유지성분의 과산화물가 측정불확도

  • Kim, Sung-Han (Research and Development Center, Namyang Dairy Products Corporation) ;
  • Kwack, Byung-Man (Research and Development Center, Namyang Dairy Products Corporation) ;
  • Ahn, Jang-Hyuk (Research and Development Center, Namyang Dairy Products Corporation) ;
  • Kong, Un-Young (Research and Development Center, Namyang Dairy Products Corporation)
  • 김성한 (남양유업(주) 중앙연구소) ;
  • 곽병만 (남양유업(주) 중앙연구소) ;
  • 안장혁 (남양유업(주) 중앙연구소) ;
  • 공운영 (남양유업(주) 중앙연구소)
  • Published : 2004.12.31

Abstract

Peroxide values (PV) of fat from fallow up formula were determined using redox-potentiometric titration method and standard method, which is based on KI oxidation by hydroperoxides and volumetric titration of liberated iodine, and their uncertainties were compared. Uncertainty sources in measurement, such as sample weight, sodium thiosulfate concentration, and titer, were identified and used as parameters for combined standard uncertainty based on Guide to the expression of uncertainty in measurement and Draft EURACHEM/CITAC Guide. Analytical results and combined standard uncertainties of peroxide values (PV) determined by standard burette and potentiometric titrations were $2.05{\pm}0.17\;and\;1.96{\pm}0.07\;meq/kg$, respectively, suggesting potentiometric titration method is suitable for determining PV of fat with low PV, because uncertainty of PV determination obtained by potentiometric titration was lower than that obtained by burette titration.

Keywords

uncertainty;peroxide values;potentiometric titration;follow up formula

References

  1. Korea Food and Drug Administration. Food Standards Codex. Korean Foods Industry Association, Seoul, Korea (2004)
  2. CODEX Alimentarius Commission. Official CODEX Standards. FAO/WHO, Geneva, Switzerland (1981)
  3. Korea Food and Drug Administration. Food Standards Codex. pp. 482-483. Korean Foods Industry Association, Seoul, Korea (2004)
  4. Anonymous. Guide to the Expression of Uncertainty in Measurement. KRISS, Daejeon, Korea (1998)
  5. Shenhar A, Kuselman I. Uncercainty in chemical analysis and validation of the analytical method: acid value determination in oils. Accred. Qual. Assur. 2: 180-185 (1997) https://doi.org/10.1007/s007690050127
  6. Pont G. A de-emulsification technique for use in the peroxide test on the fat of milk, cream, concentrated and dried milk. Aust. J. Dairy Technol. 10: 72-75 (1955)
  7. Anonymous. Guide to the expression of uncertainty in measurements. International Organization for Standardization (ISO), Switzerland (1993)
  8. Kardash-Strochkova E, Tur'yan Y, Kuselman I. Uncertainty and other parameters of peroxide value determination in vegetble oils. Accred. Qual. Assur. 7: 13-18 (2002) https://doi.org/10.1007/s00769-001-0412-4
  9. Anonymous. Quantifying uncertainty in analytical measurements 2nd. EURACHEM, London, UK (1999)
  10. Kardash-Strochkova E, Tur'yan Y, Kuselman I. Redox-potentiometric determination of peroxide value in edible oils without titration. Talanta 54: 411-416 (2001) https://doi.org/10.1016/S0039-9140(00)00649-4
  11. Antonio R, Maria C, Bernhard L. A rapid method for peroxide value determination in edible oils based on flow analysis with fourier transform infrared spectroscopic detection. Analyst 126: 242-246 (2001) https://doi.org/10.1039/b008688f
  12. AOAC. Official Methods of Analysis of AOAC International. 17th ed. Ch 41, p. 12. Method 965. 33. Association of Official Analytical Chemists, Gaithersbrug, MD, USA (2000)
  13. Kutlay M, Onur B. Improvement of calibration curve for determining peroxide values of food lipids by the modified ferrous oxidation-xylenol orange method. J. AOAC Intl. 79: 995-997 (1996)
  14. Anonymous. Guideline for Quantifying and Expressing the Uncertainty in Measurement Results. Korea Laboratory Accreditation Scheme, Seoul, Korea (2000)
  15. Anonymous. Guideline for Evaluating and Expressing the Uncertainty of NIST Measurement Results. NIST, Seoul, Korea (1993)
  16. Anonymous. IUPAC commission on atomic weight and isotopic abundances. J. Pure Appl. Chem. 69: 2471-2473 (1997) https://doi.org/10.1351/pac199769122471
  17. Dieffenbacher A, Luthi B. Die direkte Kolorimetrische Bestimmung der Peroxidzahl (POZ) in Milchprodukten. Mitt. Gebiete Lebensm. Hyg. 77: 544-553 (1986)