Detection of adulteration in apple juice by L-malic/total malic acid ratio: collaborative study.

@article{Elkins1994DetectionOA,
  title={Detection of adulteration in apple juice by L-malic/total malic acid ratio: collaborative study.},
  author={E R Elkins and J R Heuser},
  journal={Journal of AOAC International},
  year={1994},
  volume={77 2},
  pages={411-5}
}
L-Malic acid is the predominate acid in pure apple juice and no D-malic acid should be present. Synthetic malic acid contains 50% D-malic acid, is inexpensive, and can be used to create nonauthentic apple juice. L-Malic/total malic ratios of 0.9 or less are indicative of a nonauthentic sample. Fourteen laboratories participated in a collaborative study to… CONTINUE READING