Naslov
The level of citric acid in fruit juices available on Croatian market

Autori
Jagić, Katarina ; Inić, Suzana ; Jablan, Jasna ; Steiner, Sabina ; Vujić, Lovorka ; Domijan, Ana-Marija

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts of the 10th International Scientific and Professional Conference WITH FOOD TO HEALTH / Šubarić, Drago ; Jašić, Midhat - Osijek : Tuzla : Prehrambeno tehnološki fakultet Sveučilišta Josipa Jurja Strossmayera u Osijeku ; Farmaceutski fakultet Univerziteta u Tuzli, 2017, 118-118

ISBN
978-953-7005-49-8

Skup
10. međunarodni znanstveno-stručni skup: Hranom do zdravlja = 10th International Scientific and Professional Conference: With food to health

Mjesto i datum
Osijek, Hrvatska, 12.10.2017. - 13.10.2017

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
citric acid, fruit juices, high performance liquid chromatography, monitoring

Sažetak
The aim of this study was to check the level of citric acid in fruit juices (lemon, orange, apple and fruit-mix) available on Croatian market. The level of citric acid was determined by use of high performance liquid chromatography (HPLC). UV/Vis detector was set at 214 nm, mobile phase (50 mM phosphate buffer, pH= 2.8) flow rate at 0.5 mL/min and separation was performed on RP-18 column (125.0 x 4.6 mm, 5 µm ; LiChrospher, Merck, Darmstadt, Germany). Calibration curve obtained from citric acid working standards (0.125 to 1.0 g/L) was linear (R2=0.9998), repeatability (expressed as relative standard deviation, RSD) was less than 5%, the limit of detection was 0.02 g/L and the limit of quantification was 0.06 g/L, indicating that developed method is sensitive and reliable for determination of citric acid. The level of citric acid in fruit juice samples (n = 5) ranged from 1.6 g/L to 3.98 g/L. The manufacturer did not declare the level of citric acid, however in two orange juice samples the level of citric acid was higher than recommended by Commission regulation EU No. 1129/2011 (3.0 g/L), implying to the importance of monitoring the level of citric acid in products intended for human consumption.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Javno zdravstvo i zdravstvena zaštita, Farmacija

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