⁹⁰Sr radioactivity in food in Guangxi from 2012 to 2022

In order to know well the level of ⁹⁰Sr in food in Guangxi Zhuang Autonomous Region, the content of ⁹⁰Sr ingested by adults in Guangxi and the resulting annual exposure dose were estimated. The ⁹⁰Sr level in 161 food samples from 7 categories was monitored using the method of dichroic-(2-ethylhexyl) phosphate extraction chromatography, and the monitoring results were summarized and analyzed in this paper. A total of 161 food samples were detected, 136 of which were higher than the minimum detection limit with a rate of 84.5%. The specific activity of samples ranged from 0.006 to 8.801 Bq/kg. The ⁹⁰Sr specific activity of tea was the highest, with an average value of 2.880 Bq/kg and a detection range from 0.177 to 8.801 Bq/kg. The results of 161 food samples tested from 2012 to 2022 were all lower than the national standard limit. The ⁹⁰Sr ingestion of adults from these foods was 45.7 Bq, far lower than the national health standard limit(3.5×10⁴ Bq). The annual exposure dose of adult was 1.270 μSv, and the dose burden of population was slight.