Comparison of Water Quality and in vitro Antioxidant Capacity of Different Bottled Drinking Water
In order to assist the development of drinking water industry development and improve national health,it was researched of water quality comparison and antioxidant capacity in vitro of eight different brands bottled drinking water by the methods of sensory analysis(comprehensive scoring method,percentage method,fuzzy mathematics evaluation method),physical-chemical analysis(flame atomic absorption spectrophotometry,ion chromatography,etc.)and free radical scavenging assay(DPPH method,hydroxyl radical scavenging method,superoxide radical scavenging method).The results showed that eight different brands of bottled drinking water were in line with the national drinking water quality requirements.While under the comprehensive evaluation of a variety of methods,each brand of bottled drinking water showed differences:(l)In the three sensory analysis method,Nongfu Spring natural drinking water had outstanding performance.However,bottled drinking water of other brands fluctuated slightly due to factors such as appearance,packaging,taste and so on.(2)Through physical and chemical analysis,it was found that the natural mineral water of Baisui Mountain,Evergrande Ice Spring and Nongfu Spring were rich in mineral elements such as potassium,calcium,sodium and magnesium.Long-term drinking might be more beneficial to health.(3)According to the comparison of antioxidant capacity in vitro,the natural drinking water of Nongfu Spring had a strong ability to inhibit hydroxyl free radicals and resist superoxide anion,and had a strong antioxidant activity.
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