Abstract
The study was done to evaluate the quality status of selected commercial brands of juices and jams based on laboratory analysis and public perception. The entire research work was carried out in two phases to evaluate the quality of juices and jams, available in local market. In phase I, a comprehensive baseline survey was done to know the public perception and this revealed that, according to the notion of most respondents, commercial juice and jam products available in market were adulterated by harmful food colors, low grade fruits and harmful preservatives and these were harmful for health. Besides, some outcome from this survey, such as, avoiding low quality products and adopting BSTI standard, enforcing law and imposing punishment and social motivation of food consumers to prevent adulteration. In phase II, chemical analysis and sensory evaluation of selected samples were done. The collected samples were four different brands of mango juices, two different brands of mango jam, two different brands of pineapple jam and apple jam from one brand. Different parameters of collected samples like moisture content, ash content, total soluble solid content, pH, acidity as citric acid, total plate count, yeast and mold count, preservative (Sulphur dioxide and Sodium benzoate) content and heavy metal (As, Pb, Cu, Zn and Sn) content were analyzed. Heavy metal content in every sample was below the detection level. Microbial load was in safe level according to gulf standard. However, preservative content in few samples was quite higher than acceptable limit. Other parameters of collected samples were in acceptable limits. Sensory evaluation showed that all commercial jam and juice samples were more or less equally acceptable and all products obtained satisfactory total score from sensory evaluation. DOI: http://dx.doi.org/10.3329/jbau.v12i1.21410 J. Bangladesh Agril. Univ. 12(1): 183-188, June 2014
Highlights
Bangladesh is a subtropical country; here, like other agricultural produce, large volumes of different types of seasonal fruits are available in market in peak season, which causes post-harvest losses of fruits and sometimes farmers do not get actual price of their products
This study was performed to assess the quality of juices and jams by studying their physicochemical parameters, heavy metal and preservative content, microbial load and by performing sensory evaluation
Status of Adulteration: This survey was generated to know the opinions about the status of adulteration of commercial juice and jam products from the respondents
Summary
Bangladesh is a subtropical country; here, like other agricultural produce, large volumes of different types of seasonal fruits are available in market in peak season, which causes post-harvest losses of fruits and sometimes farmers do not get actual price of their products. To solve these problems, fruits are processed into juice, jam, jelly, concentrates and other products by many industries. Due to presence of sugar and high moisture content the quality of juice is very susceptible to microbial growth and quality degradation. The aim of this study is to know respondents opinion about the quality of processed juices and jams; assess the physicochemical quality parameters of Mango juice and different types of jam available in local market; detection of adulterants and contaminants and perform sensory evaluation to assess the quality
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