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用非完全消化法处理真皮样品,即在90～120℃下,用浓硝酸和过氧化氢消解,直至消化液呈透明淡黄色,再加入乳化剂Triton OP乳化消化过程中所产生的油脂,可获得均匀的样品乳浊液。取适量的乳浊液,以氘灯扣除背景吸收,建立了用石墨炉原子吸收光谱法快速测定铅的方法,并对原子吸收光谱法测铅的条件进行了优化。方法的回收率在90.0%～95.0%,检出限为0.78ng·mL~-1,相对标准偏差小于5%,该法可快速、简便地测得真皮样品中铅的含量。
Dermal samples were treated with incomplete digestion, ie digestion with concentrated nitric acid and hydrogen peroxide at 90-120 ° C until the digestive juice became clear and yellowish, then the emulsifier Triton OP was added to emulsify and digest the resulting fat. A homogeneous sample emulsion is obtained. The appropriate amount of emulsion was taken and deuterium lamp was used to deduct background absorption. A rapid method for the determination of lead by graphite furnace atomic absorption spectrometry was established. The conditions of lead absorption by atomic absorption spectrometry were optimized. The recovery rate of the method was 90.0% ~ 95.0%, the detection limit was 0.78ng · mL ~ (-1) and the relative standard deviation was less than 5%. This method can quickly and easily determine the content of lead in dermal samples.