Norén J G, Hulthe P, Gillberg C
Swed Dent J. 1987;11(1-2):45-52.
The content of lead was analysed in 101 deciduous teeth by means of potentiometric stripping analysis (PSA). In order to check possible matrix effects a limited amount of samples were analysed with atomic absorption spectrometry (AAS) as well. After weighing, the teeth were dissolved in 1M hydrochloric acid and the metal determinations were performed. The mean lead concentration was 2039 ppb w/w tooth substance. A sufficient correlation between PSA and AAS was found. A significantly higher level of lead was found in teeth from children brought up in areas of heavy traffic compared to children living in more rural areas. In conclusion the PSA technique is a reliable, sensitive and fast method for determining heavy metals in dental hard tissues. As a biproduct the corresponding figures for cadmium were achieved with a mean value of 369 ppb, however with a lower degree of confidence.
采用电位溶出分析法（PSA）对101颗乳牙中的铅含量进行了分析。为了检查可能的基体效应，还采用原子吸收光谱法（AAS）对少量样品进行了分析。称重后，将牙齿溶解于1M盐酸中并进行金属含量测定。铅的平均浓度为2039 ppb（重量/重量，基于牙质）。发现PSA和AAS之间具有充分的相关性。与生活在农村地区的儿童相比，在交通繁忙地区长大的儿童牙齿中的铅含量明显更高。总之，PSA技术是一种可靠、灵敏且快速的测定牙齿硬组织中重金属的方法。作为副产品，镉的相应数据也得以获取，其平均值为369 ppb，但置信度较低。
