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在阳极溶出伏安法测定血铅时,我们建议采用干式灰化消化血样,可较好地稳定较低的空白值,有利于提高测定的准确度。再者,经过干式灰化前处理的血样,使用JP—lA型示波极谱仪导数部分读取溶出波高,波形稳定,测定前无需采取除氧步骤,操作较简便。具体步骤如下:取血样0.05—0.10毫升于石英坩埚中,在低温电炉上干燥后置于高温电炉中,逐升温至250℃,碳化血样半小时,再逐升温至500℃,保持温度约三小时,待样品残渣呈白色或略带浅黄色时,灰化完毕。取出冷却。滴加数滴稀盐酸溶解
In the determination of blood lead by anodic stripping voltammetry, we recommend using dry ashing to digest blood samples, which can better stabilize the lower blank value and improve the accuracy of the determination. In addition, after the dry ashing pretreatment of blood samples, the use of JP-lA oscilloscope polarographic reading part of the dissolution wave height, waveform stability, no need to take before the determination of deoxygenation step, the operation is more simple. Specific steps are as follows: Take blood samples 0.05-0.10 ml in a quartz crucible, dried in a low temperature electric furnace placed in a high temperature electric furnace, by warming to 250 ℃, carbonized blood samples for half an hour, and then gradually heated to 500 ℃, maintaining the temperature for about three hours , Until the sample was white or slightly yellowish, the ashing is completed. Remove and cool. A few drops of dilute hydrochloric acid dissolved