Applied Biology in Saharan Areas
Volume 2, Numéro 2, Pages 27-31
2020-12-24

Physicochemical And Microbiological Quality Of Some Commercial Fruit Drinks And Juices In Algeria



Authors : Malainine Hesna . Makhloufi Ahmed . Sahli Asma . Makhloufi Khadidja .

Abstract

The objective of this study is to determine the compliance of fruit drinks and light juices. The physicochemical and microbiological analyses were carried out on thirty samples marketed in the city of Bechar in the southwest of Algeria. The physicochemical quality concerns the measurement of pH, acidity, density, Brix degree, and refractive index. As well as microbiological quality control concerns the enumeration of total aerobic mesophilic bacteria, coliforms, fecal streptococci, sulfur-reducing anaerobes, yeasts, and molds. Physicochemical results show means of pH3.27±0.32 with mean titratable acidity of 0.43±0.27g/100mL. The brix rate is showed an average value of11.27±2.64%. The refractive index and density show means of 1.35±0.004 and 1.03±0.02 respectively. Microbiological examination of the samples revealed the total absence of the above-mentioned germs in most of the samples with the exception of six of them that showed the presence of molds (0.23±0.57 Ufc/mL). All results of chemical quality present a highly significant difference between mean (p-value <0.001).

Keywords

Fruit juices, ; microbiological, ; physicochemical, ; quality, ; Bechar

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