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目的 探讨稀土矿区婴幼儿与其母亲头发中的稀土含量 ,以及二者的关系。方法 采用电感耦合等离子质谱法对 71名婴幼儿及 62名母亲的发根部头发进行镧、铈、镨、钕、钐 5种稀土元素的测定。结果 独立样本均数比较发现 ,婴幼儿和母亲头发 5种稀土元素均为高暴露区 >低暴露区 >对照区。如镧元素 ,婴幼儿发中水平为高暴露区 (2 2 0 2 90ng/g) >低暴露区 (471 72ng/g) >对照区 (97 37ng/g) ,母亲发中水平为高暴露区 (1 51 0 2 1ng/g) >低暴露区 (2 4 1 63ng/g) >对照区 (59 1 5ng/g) ;配对均数比较发现 ,5种稀土元素水平均为婴幼儿高于其母亲约 2倍。如镧元素 ,婴幼儿发中水平为 533 83ng/g,而母亲为 2 79 78ng/g ;简单相关分析发现 ,婴幼儿与其母亲发中 5种稀土元素均有显著相关性 ,相关系数均在 0 75以上。结论 头发作为稀土暴露研究的生物标志物具有一定的可行性 ;随着暴露程度的增加 ,头发中稀土有蓄积的趋势 ;稀土矿区婴幼儿发中各稀土元素含量明显高于其母亲 ,是该矿区稀土高暴露人群
Objective To investigate the rare earth contents in the hair of infants, young children and their mothers in the rare earth mining area and their relationship. Methods The hair growth of 71 infants and 62 mothers were measured by inductively coupled plasma mass spectrometry (ICP-MS). The lanthanum, cerium, praseodymium, neodymium and samarium were determined. Results Independent sample mean comparison found that the five rare earth elements of infant and mothers hair were high exposed area> low exposed area> control area. Such as lanthanum, the level of infants and young children was high exposed (2220290ng / g)> low exposed (47172ng / g)> control (9737ng / g) (1 51 0 2 1ng / g)> low exposure (2 4 1 63ng / g)> control (59 1 5ng / g). The comparison of paired means showed that all five kinds of rare earth elements were higher than infants Mother about 2 times. Such as lanthanum, the level of infant hair was 533 83ng / g, while the mother was 2 79 78ng / g; simple correlation analysis found that infants and young mothers hair in the five kinds of rare earth elements were significant correlation coefficient of 0 75 or more. Conclusion Hair as a biomarker for Rare Earth Exposure studies has some feasibility. With the increase of exposure, the rare earths in the hair tend to accumulate. The content of rare earth elements in infants and young children in rare earth mines is obviously higher than that of their mums. Rare high exposure to the crowd