Liquid chromatographic determination of benzoic acid in orange juice: interlaboratory study.
An interlaboratory study was carried out for the determination of benzoic acid in orange juice by liquid chromatography. The orange juice was fortified with 0.5-10 ppm benzoic acid. Statistical analysis of the results showed that relative reproducibility (RSDR) between laboratories ranged from 6.92 to 15.97% for juice fortified with 1-10 ppm benzoic acid; RSDR was 27.90% for juice fortified with 0.5 ppm benzoic acid. Mean recoveries ranged from 94.5% for 4 ppm benzoic acid to 114% for 0.5 ppm benzoic acid. Total variability increased with increasing fortification level as measured by standard deviation for reproducibility (SR).
Lee
H S
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Florida Department of Citrus, Citrus Research and Education Center, Lake Alfred 33850.
D001565:Benzoates / Q000032:analysis*; D019817:Benzoic Acid; D001628:Beverages / Q000032:analysis*; D002853:Chromatography, Liquid; D002957:Citrus / Q000737:chemistry*; D005374:Filtration; D005520:Food Preservatives / Q000032:analysis*; D007202:Indicators and Reagents
D001565:Benzoates; D005520:Food Preservatives; D007202:Indicators and Reagents; D019817:Benzoic Acid