Nutritional and Microbial Evaluation of Commercial apple Juices Available in Market of Peshawar City

Abstract

The present study was aimed to carry out quality assessment of different commercial apple juices available in the market of Peshawar city. Physiochemical characteristics like moisture, total soluble solids (Brix°), pH, acidity (%), Vit-C (%), total dissolved solids (ppt), reducing sugars (%), non-reducing sugars (%) and SO2 residue concentration (g/Kg) and microbial analysis of six juice samples were carried out. % moisture contents of sample VI was found higher (88.25±1.88) and lowe of sample III having % moisture content (82.67±1.71). Of all the samples, sample III has highest TSS (13.1±0.82), in contrast lowest TSS was found for sample VI (1.17±0.15). pH was found in the range of 3.39±0.05 to 3.08±0.01. Higher pH was observed for sample VI and lower for sample II. Total acidity (%) was observed maximum for sample I (0.83±0.05) and was found minimum for sample VI (0.11±0.03). Sample III has maximum Vit-C concentration (%) of 26.01±0.05 and sample VI has minimum Vit-C content (%) i.e. 14.00±0.10. Total dissolve solids (TDS) of the commercial apple juice samples (I-VI) were recorded in the range of 0.84 to 0.23. Highest TDS was found for sample I and lowest for sample II. Maximum % reducing and non-reducing sugars were observed for sample I i.e. (21.45±0.93) and (2.1±0.74) respectively, while in sample V and VI no content of (0.00) of % reducing and non-reducing sugars were found. Of all the selected juice samples, only samples I and III showed SO2 residues concentration within WHO standard (