Determination of citric acid in fruit juices using spectrophotometer
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A method using liquid chromatography coupled to tandem-mass spectrometry (LC–MS/MS) with triple quadrupole in selective reaction monitoring mode was developed to determine organic acids (glutamic, tartaric, quinic, malonic, malic, shikimic, α-ketoglutaric, pyruvic, citric, succinic and fumaric acids) in fruits (melon, grape, peach, orange, lemon) and vegetables (green and red pepper, tomato, lettuce and lamb’s lettuce). The negative ion mode of ESI was used. All the validation parameters were found to be within the range of acceptance for all the …
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