Nineteen authentic citrus juice samples (6 tangerine, 4 sweet orange, 4 grapefruit, 4 lemon and 1 sour orange) were investigated with respect to organic acid distribution. | Turk J Agric For 28 (2004) 267-271 © TÜB‹TAK Main Organic Acid Distribution of Authentic Citrus Juices in Turkey Feryal KARADEN‹Z* Ankara University, Faculty of Engineering, Department of Food Engineering, Campus of Agricultural Faculty, D›flkap› 06110, Ankara – TURKEY Received: Abstract: Nineteen authentic citrus juice samples (6 tangerine, 4 sweet orange, 4 grapefruit, 4 lemon and 1 sour orange) were investigated with respect to organic acid distribution. Average citric, malic and fumaric acid contents of tangerine juices were g l-1, g l-1 and 368 µg l-1, respectively. These values for orange juices were g l-1, g l-1 and 373 µg l-1, respectively. The citric acid concentration in lemon juices, having the highest acidity, varied between and g l-1. It was followed by grapefruit juices with an average g l-1 citric acid content. In all citrus juices, the most abundant organic acid was citric acid, ranging from to g l-1, with the exception of one tangerine variety. Malic acid was the second most abundant acid ( g l-1), followed by fumaric acid (0-807 µg l-1). Grapefruit, lemon and sour orange juices did not contain fumaric acid. Key Words: organic acid, orange, grapefruit, lemon, tangerine Türkiye’deki Do¤al Turunçgil Sular›nda Bafll›ca Organik Asitlerin Da¤›l›m› Özet: 19 adet do¤al turunçgil meyve suyu örne¤inde (6 mandarin, 4 portakal, 4 greyfrut, 4 limon ve 1 turunç) organik asit da¤›l›m› araflt›r›lm›flt›r. Mandarin sular›ndaki sitrik, malik ve fumarik asit miktarlar› ortalama olarak s›ras›yla g l-1, g l-1 ve 368 µg l-1 olarak belirlenmifltir. Portakal sular›nda ise bu asitlere ait de¤erler s›ras›yla g l-1, g l-1 ve 373 µg l-1 olarak saptanm›flt›r. Asitli¤i en yüksek olan limon sular›nda sitrik asit miktar› g l-1 aras›nda de¤iflim göstermektedir. Bunu ortalama g l-1 sitrik asit miktar› ile greyfrut suyu izlemektedir. Mandarin varyetelerinden bir tanesi .
