Fast and efficient analytical methods to determine the concentrations of lactic, acetic, propionic and butyric
acids in sour cassava starch wastewater using reversed-phase high performance liquid chromatography
(HPLC) and capillary electrophoresis (CE), were developed and validated. Good linearity (R2 > 0.999)
and significance with F > 25,000 for all acids was showed. The matrix effect was not detected. The coef-
ficient of variation values indicated good repeatability. The limits of detection (LOD) ranged from 1.0 to
3.7 and 2.0 to 3.0, and the limits of quantification (LOQ) from 3.1 to 12.2, and 8.0 to 12.5 mg/L for HPLC
and CE, respectively. The quantification of the samples did not reveal significant differences between the
methods for all compounds analyzed. However, the benefits of CE in relation to HPLC, such as lower costs
and less waste generation, along with shorter analysis times, need to be taken into consideration
Fast and efficient analytical methods to determine the concentrations of lactic, acetic, propionic and butyricacids in sour cassava starch wastewater using reversed-phase high performance liquid chromatography(HPLC) and capillary electrophoresis (CE), were developed and validated. Good linearity (R2 > 0.999)and significance with F > 25,000 for all acids was showed. The matrix effect was not detected. The coef-ficient of variation values indicated good repeatability. The limits of detection (LOD) ranged from 1.0 to3.7 and 2.0 to 3.0, and the limits of quantification (LOQ) from 3.1 to 12.2, and 8.0 to 12.5 mg/L for HPLCand CE, respectively. The quantification of the samples did not reveal significant differences between themethods for all compounds analyzed. However, the benefits of CE in relation to HPLC, such as lower costsand less waste generation, along with shorter analysis times, need to be taken into consideration
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