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首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Chemical, microbial and physical evaluation of commercial bottled waters in greater Houston area of Texas
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Chemical, microbial and physical evaluation of commercial bottled waters in greater Houston area of Texas

机译：德克萨斯州大休斯顿地区商业瓶装水的化学，微生物和物理评估

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摘要

Due to the increased demand and consumption of bottled water in the United States, there has been a growing concern about the quality of this product. Retail outlets sell local as well as imported bottled water to consumers. Three bottles for each of 35 different brands of bottled water were randomly collected from local grocery stores in the greater Houston area. Out of the 35 different brands, 16 were designated as spring water, 11 were purified and/or fortified tap water, 5 were carbonated water and 3 were distilled water. Chemical, microbial and physical properties of all samples were evaluated including pH, conductivity, bacteria counts, anion concentration, trace metal concentration, heavy metal and volatile organics concentration were determined in all samples. Inductively coupled plasma/mass spectrometry (ICPMS) was used for elemental analysis, gas chromatography with electron capture detector (GCECD) as well as gas chromatography mass spectrometry (GCMS) were used for analysis of volatile organics, ion chromatography (IC) and selective ion electrodes were used for the analysis of anions. Bacterial identification was performed using the Biolog software (Biolog, Inc., Hayward, Ca, USA). The results obtained were compared with guidelines of drinking water recommended by the International Bottled Water Association (IBWA), United States Food and Drug Administration (FDA), United States Environmental Protection Agency (EPA) and the World Health Organization (WHO) drinking water standard. The majority of the analyzed chemicals were below their respective drinking water standards for maximum admissible concentrations (MAC). Volatile organic chemicals were found to be below detection limits. Four of the 35 brands of the bottled water samples analyzed were found to be contaminated with bacteria.
机译：由于在美国瓶装水的需求和消耗增加，对此产品的质量越来越关注。零售店向消费者出售本地和进口的瓶装水。从大休斯顿地区的当地杂货店中随机抽取35种不同品牌瓶装水中的每种3瓶。在35个不同的品牌中，有16个被指定为泉水，有11个为纯净和/或强化自来水，有5个为碳酸水，有3个为蒸馏水。评估了所有样品的化学，微生物和物理性质，包括所有样品的pH，电导率，细菌数，阴离子浓度，痕量金属浓度，重金属和挥发性有机物浓度。电感耦合等离子体/质谱（ICPMS）用于元素分析，带电子捕获检测器的气相色谱（GCECD）以及气相色谱质谱（GCMS）用于分析挥发性有机物，离子色谱（IC）和选择性离子电极用于分析阴离子。使用Biolog软件（Biolog，Inc.，Hayward，Ca，USA）进行细菌鉴定。将获得的结果与国际瓶装水协会（IBWA），美国食品药品监督管理局（FDA），美国环境保护局（EPA）和世界卫生组织（WHO）饮用水标准推荐的饮用水准则进行比较。对于最大允许浓度（MAC），大多数分析化学物质均低于各自的饮用水标准。发现挥发性有机化学物质低于检出限。在分析的35个瓶装水样品中，有四个品牌被细菌污染。

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