Abstract：
:A sensitive, fast, and inexpensive square wave voltammetric method using a cobalt phthalocyanine modified carbon paste electrode was developed for simultaneous determination of citric, lactic, malic and tartaric acids in fruit juices. To overcome the strong overlap of voltammetric signals caused by calibrated and uncalibrated constituents, multivariate curve resolution with alternating least squares (MCR-ALS) was used. Data were previous treated for correction of baseline and potential shift. The MCR-ALS calibration models were constructed and evaluated using a validation set obtained from a Taguchi design. The values predicted by the optimized MCR-ALS models were unbiased and no statistically significant difference was observed between proposed and reference methods, applying the paired t-test at a confidence level of 95%. As far as the authors know, a voltammetric method that simultaneously determines four organic acids in complex samples such as fruit juices without any previous pretreatment has not yet been reported in the literature.
journal_name
Food Chemjournal_title
Food chemistryauthors
Silva AC,Lourenço AS,de Araujo MCUdoi
10.1016/j.foodchem.2018.06.005subject
Has Abstractpub_date
2018-11-15 00:00:00pages
232-239eissn
0308-8146issn
1873-7072pii
S0308-8146(18)30966-Xjournal_volume
266pub_type
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