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本文报道了内江市８个磷肥石的磷肥及其原料矿石中天然铀、￣（２２６）Ｒａ含量水平，其结果为：磷肥样品中￣（２２６）Ｒａ含量２４５．８±１１２．９Ｂｑ．ｋｇ￣（－１），天然铀含量２７．２±１６．４ｐｐｍ；磷矿石样品中￣（２２６）Ｒａ含量４０７．６±９４．３Ｂｑ．ｋｇ￣（－１），天然铀含量３１．４±２１．０ｐｐｍ．
In this paper, eight phosphate fertilizers in Neijiang City and the natural uranium content of ~ (226) Ra in their raw ore are reported. The results show that the content of ~ (226) Ra in the phosphate fertilizer sample is 245.8 ± 112.9Bq. kg ~ (-1) and 27.2 ± 16.4ppm of natural uranium. The Ra content of 407 ~ 96.3Bq ~ kg ~ (-1), natural uranium content of 31.4 ± 21.0ppm.