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近年来,人们开始把微升量的溶液用于火焰原子吸收法分析获得成功。此方法无须改动仪器,只用微升注射器将样品溶液加在预先用钻头钻好的聚四氟乙烯棒端上的浅洞内,再将塑料毛细管插进吸入火焰中就可完成一种快脉冲喷雾测定。这种方法被称为“一滴法”或“注入法”。首先由Sebastian等提出,其后有不少人进行了研究。本文对微量取样的取样量、灵敏度、精确度等作了试验,并通过实例证实了“一滴法”具有用样量少,快速,简便,通用等特点。
In recent years, people began to use the micro-liter solution for flame atomic absorption spectrometry success. This method without changing the instrument, only the micro-liter syringe solution will be added to the sample pre-drilled with a Teflon rod on the shallow hole, and then insert the plastic capillary into the flame can be done to achieve a fast pulse Spray determination. This method is called “drop method” or “injection method.” First proposed by Sebastian and others, followed by many people conducted a study. In this paper, the sampling volume, sensitivity and accuracy of micro-sampling are tested. The example shows that “one-drop method” has such advantages as less sample size, quickness, simplicity and versatility.