原子吸收法测定钡天青石中微量钾的研究

钡天青石矿物中主要含钡、锶、硫酸根以及镁、钙、钠和其他少量元素,这些元素中钡、锶、钠等对微量钾的测定有较大的电离干扰。由于钾的电离电位仅4.34电子伏特,在乙炔～空气火焰中电离大约50％,不仅使吸光度下降,而且标准曲线弯曲。为了提高测定灵敏度和消除因钡锶钠等元素的电

Determination of Micro Amount of Potassium in Celestine by AAS

A Simple method for the determination of micro amount of potassium in cele- stine by aas was studied. The interference of Ba, Sr and Na ions were elimin- ated by adding suitable amounts of th.e restrainer (LaCl3) and masking agent -EDTA sohaion. "The sample was decomposed with HF+HC14,, the solution containing LaCL3 and EDTA was adjusted to 1% hydrocbloric acid medium, the potassium was determined by aas directly.