Author/Authors :
Soltanian، AR نويسنده Dept. of Biostatistics, School of Medical Sciences, Tarbiat Modares University, Tehran, Iran , , Faghihzadeh، S نويسنده Dept. of Biostatistics, School of Medical Sciences, Tarbiat Modares University, Tehran, Iran , , Mehdibarzi، D نويسنده Dept. of Orthopaedics, Faculty of Medical Sciences, Shahed University, Tehran, Iran , , Gerami، A نويسنده Dept. of Mathematical Statistics, School of Mathematics, Statistics and Computer Sciences, Tehran Uni versity, Iran , , Nasery، M نويسنده Dept. of Pharmacology, Faculty of Medical Sciences, Shahed University, Tehran, Iran , , Cheng، J نويسنده Dept. of Biostatistics &Epidemiology, University of Florida, Gainesville, U.S.A ,
Abstract :
Background: The purpose of study was to evaluate and compare chemical quality of Iranian bottled drink ing water reported on manufacturerʹs labeling and standards.
Methods: This study was a cross-sectional descriptive study and done during July to December 2008. The bottled mineral water collected from shops randomly were analyzed for all parameters address on manu facturerʹs labeling and the results were compared with the manufacturerʹs labeling data, WHO Guide line Values, USEPA Maximum Contaminant Levels and the maximum contaminant levels of drink ing water imposed by the Iranian legislation. Statistical analysis on data was done with the Kolmo gorov-Smirnov test for normal distribution, the paired t-test to compare the data with manufac-turerʹs label ing and the one-sample t-test to compare with standard and MCL values at P < 0.05 of confidence level.
Results: The results showed a statistically significant difference with manufacturerʹs labeling values, how ever there was no significant difference between the values of magnesium and pH and manufac-turerʹs labeling values (P > 0.05). In addition, pH and calcium values were significantly higher than their pro posed values indicated by Iranian National Legislation and international MCLs (P < 0.05).
Conclusion: Our results are extremely important for the health supervisory agencies such as Ministry of Health and Institute of Standards & Industrial Research of Iran to have more effective controls on bot tled water industries, and to improve periodical the proposed standard values.
