DETERMINATION OF INORGANIC COMPOUNDS IN ORANGE JUICE - A EUROPEAN INTERCOMPARISON
An intercomparison has been carried out between 24 laboratories of six European countries on the determination of nine inorganic parameters used in the control of the quality of fruit juices. Each laboratory received four randomly selected 200 ml bottles of an orange juice, specially prepared from a concentrate. They were requested to use the method(s) for which they have the best experience to perform four independent determinations for each property. The results obtained for relative density, pH value, ash, sodium, potassium, calcium, magnesium and phosphate were considered as acceptable by the specialists in the field. Relative coefficients of variation and between- to within- laboratory standard deviation ratios respectively range from 0.025 to 6.9% and from 1.5 to 5.3. However, for the nitrate determination, the agreement of the results was not good, so that it was decided to repeat that determination in a collaborative study consisting of a step by step approach.
Bibliographic Reference: EURO FOOD CHEM IV, LOEN (NORWAY), JUNE 1-4, 1987 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 33251 ORA
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Record Number: 1989125071000 / Last updated on: 1987-12-01
Available languages: en