高氯酸盐是健康问题的污染物 因为长期暴露在高浓度下 可能会对甲状腺活动产生不利影响。作为回应 次氯酸钠中高氯酸盐的最新发现， NSF国际调查次氯酸钠产品 用于处理饮用水以更好地理解 高氯酸盐作为污染物的出现。 高氯酸盐污染发生在更多的地方 超过90%的次氯酸钠样品来自生产 北美各地的设施。结果还表明 随着时间的推移，高氯酸盐浓度有增加的趋势 次氯酸钠老化。储存的时间和条件 可能会影响公用事业公司次氯酸盐中污染物的水平 供应并最终提供饮用水。 调查为提出建议提供了依据 尽量减少高氯酸盐的形成，降低 可能会意外添加到饮用水中。 次氯酸钠应在黑暗中储存 冷却温度，如果可能的话进行稀释，并在室内使用 几周的生产。包括10个参考文献、表格和图表。

Perchlorate is a contaminant of health concern because exposure to high levels over extended periods may adversely affect thyroid activity. In response to recent findings of perchlorate in sodium hypochlorite, NSF International surveyed sodium hypochlorite products used to treat drinking water to better understand the occurrence of perchlorate as a contaminant. Perchlorate contamination was found to occur in more than 90% of sodium hypochlorite samples from production facilities across North America. Results also indicated a trend of increasing perchlorate concentration as the hypochlorite aged. The duration and conditions of storage can affect the levels of the contaminant in a utility's hypochlorite supplies and ultimately its drinking water. The investigation provided a basis for recommendations to minimize perchlorate formation and lower the potential for its unintended addition to drinking water. Sodium hypochlorite should be stored in the dark at cool temperatures, diluted if possible, and used within a few weeks of manufacture. Includes 10 references, tables, figures.