Using DSA/TOF, we showed that tartaric acid is only naturally present in grape juice, and not in pomegranate juice. Using DSA/TOF, we showed that we can detect the adulteration of pomegranate juice with as little as 1 % grape juice or higher, using tartaric acid as a marker compound, with no sample preparation. The tartaric acid response increased with the increase in grape juice adulteration in pomegranate juice. Using DSA/TOF and stable isotope dilution, we showed that the amount of malic acid in pomegranate juice and apple juice was 0.575 g/L and 3.45 g/L, respectively. These values for malic acid correlated well with values reported for malic acid in pomegranate and apple juice in the literature. Using DSA/TOF, we showed that amount of the malic acid in pomegranate juice increased linearly with the increase in apple juice adulteration. The adulteration of pomegranate juice with as little as 5 % apple juice or higher was detected successfully with DSA/TOF with minimal sample preparation. The average measurement time was less than 30 s. The average accuracy of mass measurements was less than 5 ppm.
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