摘要
目的了解闽北大米中铅、镉污染状况,进行风险预警。方法按照《2011年福建省卫生系统食品安全风险监测方案》的要求,采集市辖10个区县市的农户自产水稻,经自然晾干后去壳、粉碎、过20目尼龙筛制成样品,用石墨炉原子吸收光谱法测定铅、镉含量。结果在269份样品中,铅、镉检出率分别为84.8%和100%,平均值为0.093 mg/kg和0.056 mg/kg;中位数为0.093 mg/kg和0.038 mg/kg;P90值为0.19 mg/kg和0.12 mg/kg。不同区县铅含量差异没有统计学意义(P>0.05),不同区县镉含量差异有统计学意义(P<0.01)。与国标比较,铅、镉超标率均为1.5%。结论闽北大米有不同程度铅、镉污染;虽然污染水平较低,亦不可掉以轻心,应进一步加强监测,控制污染,保障食品安全。
Objective To understand the pollution situation of lead and cadmium in rice from northern Fujian, so as to provide early warning for food safety. Methods According to ＂Food safety risk monitoring plan of Fujian province in 2011＂, the rice samples were randomly collected from 10 counties and cities of the northern Fujian, and treated by hulling, smashing, then sieved by 20 mesh nylon nets to detect the contents of lead and cadmium in rice by graphite furnace atomic absorption spectrometry. Results The detection rates were 84.8% and 100% for lead and cadmium respectively in 269 samples, with average of 0. 093 mg/kg for lead and 0.056 mg/kg for cadmium, median of 0. 093 mg/kg and O. 038 mg/kg respectively, and P90 value of 0.19 mg/kg and 0.12 mg/kg respectively. The contents of lead had no statistical difference among different counties （P 〉 0.05 ）, while that of cadmium had statistical differene among different counties （ P 〈 0.01 ）. Compared to national standard, the exceeding rates of both were 1.5%. Conclusion The rice from northern Fujian was polluted by lead and cadmium at different levels. Although the pollution level is low, it is still worth of paying attention to surveillance and control in this area to guarantee food safety.
出处
《中国卫生检验杂志》
北大核心
2014年第1期61-62,65,共3页
Chinese Journal of Health Laboratory Technology
关键词
大米
铅
镉
环境污染
食品安全
Rice
Lead
Cadmium
Environmental pollution
Food safety
