EFFECTS OF STORAGE TEMPERATURE AND SUN LIGHT EXPOSURE ON SOME BOTTLED WATER MARKETED IN KIRKUK CITY, NORTH IRAQ

Abstract

The study was conducted for assessing the effect of storage temperature and sun light exposure on four bottled water (A, B, C, D company) marketed in Kirkuk city, north Iraq during February 2017 to May 2017. Physicochemical tests were including (EC, TDS, pH, turbidity, alkalinity, total hardness, Ca+2, Mg+2, Na+ and K+). The pH values (7.40-7.89) show slightly alkaline trend. The electrical conductivity of bottled water sample showed with short variation (209-468 µS/cm) and all samples are with the WHO and IBWA limit for drink water. Total dissolved solid (TDS) values of sample varied between (118–288 mg/L). Turbidity values for all samples from study area fluctuated between (0.06–4.99 NTU) all samples are with the WHO limit for drink water. Total alkalinity values for all samples from study area ranged between (88–205 mg CaCO3/L). Calcium and magnesium concentration in bottled water varied from 23.34–49.98 mg/L and 3.86-22.32 mg/L respectively. Sodium ion concentration ranged between 0.1-5.05 mg/L. In the present study the potassium ion concentration ranged between 0.1-1.08 mg/L. The change of physicochemical characteristic investigated when the bottled water exposed to sunlight or storage at different temperature according to WHO and IBWA.