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本文用火焰原子吸收法测定牙釉质中铜、锌、铁含量。测定健康者26人,铜、锌、铁平均值分别为16.4±6.5ug/g,325.8±84.8ug/g,34.7±9.1ug/g;龋病患者54人,铜、锌、铁平均值分别为16.1±5.4ug/g,269.9±63.5ug/g,38.7±10.0ug/g。测定结果表明,龋病患者牙釉质中的铜略低于正常者,锌明显低于正常者,而铁略高于正常者。该方法的回收率铜为98.25～103.3％,锌为97.0～101.5％,铁为97.2～102.4％;相对标准偏差铜小于2.79％,锌小于2.60％,铁小于2.10％。
In this paper, flame atomic absorption spectrometry determination of enamel copper, zinc, iron content. The mean of copper, zinc and iron were 16.4 ± 6.5 ug / g, 325.8 ± 84.8 ug / g and 34.7 ± 9.1 ug / g, respectively. The mean of copper, zinc and iron in 54 caries patients were 16.1 ± 5.4 ug / g, 269.9 ± 63.5 ug / g, 38.7 ± 10.0 ug / g. The results showed that dental caries in enamel of copper slightly lower than normal, zinc was significantly lower than normal, while iron slightly higher than normal. The recovery rate of copper is 98.25-103.3%, zinc is 97.0-101.5%, iron is 97.2-102.4%, relative standard deviation is less than 2.79% copper, zinc is less than 2.60% and iron is less than 2.10%.