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رکورد قبلیرکورد بعدی
نوع مدرک : TF
زبان مدرک : فارسی
شماره رکورد : 66806
شماره مدرک : ‭پ۵۳۳۵۱‬
شماره راهنما : ‭ع۶۸۰۰‬
سر شناسه : علمی، سام
عنوان اصلي : بررسی غلظت فلزات سنگین، نیترات و نیتریت در آبهای بسته بندی شده موجود در بازار مشهد در سال‭۱۳۹۰ ‬
نام عام مواد : [پایان‌نامه]
نام نخستين پديدآور : /سام علمی
نام ساير پديدآوران : ؛استاد راهنما: رضا موسوی، مهدی بلالی مود
نام ساير پديدآوران : ؛استاد مشاور: منور افضل آقایی
وضعيت نشر : دانشگاه علوم پزشکی مشهد، ‭۱۳۹۱‬، دانشکده پزشکی
صفحه شمار : ‮‭[۱۵۲]‬ ص.‬: نمودار
يادداشت : چکیده فارسی، چکیده انگلیسی
يادداشت : چاپی
خلاصه يا چکيده : ‭selling brand of packaged drinking water in mashhad's market were identified.8 bottles from each brand were randomly prepared and at the same day delivered to Laboratory.The concentration of heavy metals (lead, mercury, arsenic, chromium, aluminum, cadmium) in samples has been measured with atomic absorption methods and nitrate and nitrite are measured by Spectrophotometer methods,within a week later they've been delivered. After the results have been specified, the data were analyzed by using SPSS software version 11.5. Results :In this project,the average concentrations of heavy metals in 10 brand are as below:lead 1.6 (-Background:Due to the increasing consumption of bottled water in recent years to ensure the safety of these products we planed to determinate the concentration of heavy metals and nitrate and nitrite components in bottled water which sold in mashhad. Method: with reference to the whole sale market in mashhad, the 10 best‬إ(‭g/L).chromium‬إ‭(‬‭g/L), cadmium 0.17‬إ‭(‬‭g/L),mercury 3.86‬إ‭(‬‭g/L),arsenic 0.89‬إ‭g/L).the averenge measured quantities of nitrate ,nitrite and PH was as below:10(mg/l),0 (mg/l)and 7.92. Conclusion: measured Mercury concentration were more than standard quantities in 9 brand.other measured heavy metal quantities and nitrate and nitrite in each sample were in normal range;accordingly there was a discrepancy between enteries of labels and measured quantities. Keywords:nitrate,nitrite,heavy metals,bottled water‬
 
 
 
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