地下水中碘离子保存方式初探

Discussion about the Preservation Ways of I^- in Groundwater

对于地下水样品中碘离子的保存方式和时间,地质行业标准和国内外主要国家标准间存在明显差异。为了分析各类标准在样品保存要求上的差异对检测结果是否带来影响,确保检测数据的准确性,文章在广州地区采集地下水,按照地质行业标准与国家标准进行处理和保存,并在不同时间段对三个指标进行测试。结果表明:地质行业标准与国家和美国标准关于水样的保存方法均非常可靠。在广州地区,采用原水和碱化水室温避光保存水样,碘离子保存时间可长达30天,均比地质行业标准和国家标准推荐的有效时间长,保存方式相对冷藏来说更方便。

There are significant differences between geological industry standards and national and international standards about the storage ways and time for 1＂ In order to analyze the differences of the storage condition of the various types of standards about groundwater, and to make sure getting accurate testing results, stability research of I＂ in groundwater of Guangzhou Region were studied. Under the two kinds of preservation conditions adding NaOH and adding nothing in groundwater, testing the index by using new sealed samples at different time, the results showed that all standards about water preservation are reliable, including geological industry standards, national and international standards. Under the condition of keeping samples in dark places, the content of I＂ was nearly the same under the two kinds of storage conditions in 30 days. Both two ways are more effective than geological industry and national standards, and it is easier to keep samples in dark places than keep in refrigeration.