母乳中铬的石墨炉原子吸收光谱测定法  

Determination for chromium in breast milk with graphite furnace atomic absorption spectrometry

作　　者：林凯[1] 张建清[1] 姜杰[1] 李瑞园[1] 陈裕华[1] 张慧敏[1] 

机构地区：[1]深圳市疾病预防控制中心理化检验科,广东深圳518055

出　　处：《环境与健康杂志》2014年第4期332-334,共3页Journal of Environment and Health

基　　金：国家科技部863项目(2011AA060605);深圳市科技创新委项目(JCY20130329103949643)

摘　　要：目的建立母乳中铬的石墨炉原子吸收光谱（GFAA）测定方法。方法母乳样品经密闭高压消解后,加入0.3%硝酸镁溶液作基体改进剂,灰化温度1 200℃,原子化温度2 450℃,用石墨炉原子吸收光谱法测定铬含量。结果在0.5～10μg/L的线性范围内,该方法所得铬的回归方程为y=0.031x＋0.002 5,r=0.999 8。该方法的检出限为0.35μg/L,加标回收率为97.0%～103.2%,RSD〈5%。结论该方法具有良好的准确度和灵敏度,适合母乳中铬含量的测定。Objective To develop a method for the determination of chromium（Cr） in human breast milk by graphite furnace atomic absorption spectrometry（GFAA）. Methods Breast milk sample was treated with sealed digestion with high pressure,0.3% of magnesium nitrate solution as matrix modifier, determined by GFAA at 1 200 ℃ for ashing and 2 450 ℃ for atomization. Results The linear range was 0.5-10 μg/L（r=0.999 8） with detection limit of 0.35 μg/L and recovery rates of97.0%-103.2% and RSDs of less than 5%. Conclusions This method is sensitive,reliable and suitable for the determination of Cr in human breast milk.

关 键 词：母乳 铬 石墨炉原子吸收光谱法 

分 类 号：O657.6[理学—分析化学]