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Determination Of Heavy Metals In Beverages Sold By Roadside Vendors From Different Public Places Of Lahore

by Numan Shoukat (2009-VA-504) | Dr. Naureen Naeem | Dr. Sanaullah Iqbal | Dr. Saima Inyat.

Material type: book Book; Literary form: not fiction Publisher: 2016Dissertation note: Food safety is serious issue now a days in Pakistan as many food borne diseases occur due to consumption of unsafe local beverages and soft drinks. Use of polluted water in locally produce beverages and juices without any treatment liable to cause diseases. In summer beverages are commonly used to quench the thirst in Pakistan due to hot weather. Excessive use of such type of drinks cause different diseases like hypertension, gastrointestinal problem, liver and kidney failure, and also carcinogenic. So in this project, concentrations of various heavy metals including Lead, Cadmium and Iron were determined in local beverages (roadside vendors) from different public places of Lahore, Punjab Pakistan. Total 200 samples of five different types of beverages were collected from ten different public places of Lahore. 50 samples were collected with the interval of 15 days. Sampling were repeated three times from four different road side vendors of same areas. The analyses will be carried out using atomic absorption spectroscopy (AAS) with electro thermic atomization in graphite furnace for the determination of the total content of lead (Pb) iron (Fe) and cadmium (Cd). The concentration of the digested soft drink samples will be derived from the regression equation and the samples will analyzed in duplicates. Present study was conducted at the Department of Environmental Sciences, UVAS Lahore for the duration of four months. The data thus obtained from this research was evaluated through descriptive statistics. And the results of concentration of lead, iron and cadmium are not significant and not according to Standards of Pakistan. Availability: Items available for loan: UVAS Library [Call number: 2542-T] (1).

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Evaluation Of Microbial Quality And Sensory Attributes Of Fresh Fruit Juices Sold At Various Places Of Lahore

by Anam Sajid (2013-VA-964) | Dr. Zubair Farooq | Dr. Sanaullah Iqbal | Dr. Aftab Ahmed Anjum.

Material type: book Book; Literary form: not fiction Publisher: 2016Dissertation note: The beverage industry in Pakistan has emerged as a progressive sector over the years. Juices are rich source of nutrients containing vitamins minerals but the microbial quality and sensory attributes of street vended, corners and restaurant juices is not at satisfied level. Juices squeezed from fresh fruits and vegetables contain microorganisms which are potentially hazardous to public health Therefore this study aimed to evaluate the microbial quality and sensory attributes of fresh fruit juices sold at various places of Lahore. The selling and consumption of juices are never stopped on nutritional grounds as well as livelihood of street vendors. It is alarming situation for suitable agency to take some necessary action, make guidelines to prevent potential food poisoning from juices that contain pathogenic bacteria, and find natural antimicrobials from plants that control spoilage and pathogenic microorganisms in juices. Microbial quality and sensory attributes of Street vended, corners and restaurant juices are not in good condition. Sample of 243 juices of three types, pineapple, peach pomegranate took from three categories, collected from 9 towns of Lahore (for 1 town 9 from each flavor that makes 27 from each town). The categories were juices from Street Vender (SV), Juice Corner (JC) and Restaurants (RT). All the samples were evaluated for sensory attributes (appearance, color, smell, taste and overall acceptability) by using 15-point hedonic scale and microbiological parameters, Aerobic Plate Count (APC), Total Coliform Count (TCC), Total Staphylococcus Count (TSC) and Salmonella detection.Data was analyzed statistically by theone way ANOVA for sensory evaluation and microbial count with 5% probability. Means were compared by LSD (least significant difference) test (Steel et al.,1997). Results of my study indicates that juice samples collected from SV of various areas of Lahore showed very high number of microbiological counts and got very low score for its sensory attributes. While samples collected from JC showed microbiological counts less than SV and sensory attributes scores more than juices from SV. This was not only due to poor hygienic quality of these juices but also places consumers at a high risk of contracting food-borne infections. Lack of sanitary conditions in street vended juice stalls and the occurrence of pathogenic bacteria in juices are alarming enough for an immediate action by the suitable agency. Regular monitoring of the quality of fruit juices for human consumption must be introduced to avoid any future pathogen outbreaks. Juices took from RT revealed very low microbiological counts and very good score on hedonic scale which shows that they have good hygienic conditions. Their preparation methods and surrounding environment are clean. At the end of this study we concluded that there was significant discrimination among the categories and the varieties of fresh fruit juice vendors as well as among the different towns. The microbial quality and sensory acceptability of fresh fruit juices sold at various locations of Lahore were not satisfied and we have to take step to make the conditions of our street vendors and juice corners better by giving them proper training about personal and environmental hygiene so that consumers can use the safe juices free from contamination. Availability: Items available for loan: UVAS Library [Call number: 2603-T] (1).

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