方法：用氟离子选择电极法检测水氟含量。
Method: Fluoride level in drinking water was examined with F-ion selective electrode method.
目的了解河南省降氟改水打井工程水氟含量和工程使用情况。
Objective To understand water fluoride concentration and application of the fluoride lowering well digging projects in Henan Province.
方法：水氟含量采用氟离子选择电极法进行检测，儿童氟斑牙采用三型九度法。
Methods The fluoride contents were tested by fluoride selective ion electrode, dental fluorosis prevalence rate of children was examined according to clinical diagnosis standard.
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