ICP-AES法同时测定硅酸盐杂质抑制剂水玻璃中Na、K、Si、Fe、Al的方法

Research on ICP-AES method to detect sodium,potassium,silicon,iron and aluminium of water glass

针对工业固体、液体水玻璃在选矿工艺上的重要作用,采用不同的制样方法酸化定容后,直接用ICP-AES快速测定选矿抑制剂水玻璃中Na、K、Si、Fe、Al成分含量和模数的方法;该法具有抗干扰能力强、线性范围宽、精密度高、结果准确等特点.在方法选择中,对入射波长、雾化压力、入射功率、提升量等分析条件进行了优选,方法的检出限为0.002 4～0.38μg/mL,相对标准偏差为0.48%～0.80%,适用于水玻璃成分的快速分析.

The water glass can inhibit silicate as inhibitors in mineral processing of phosphate ore. The main composition of water glass should have influence on inhibit efficiency. This article is based on the important action of water glass which has the process of acidification and constant volume with adopting different sampling way, and then the rapid determination method of ICP-AES has been applied to detect the content and modulus of some elements in water glass such as sodium, potassium, silicon, iron and aluminium and so on. This way has strong anti-interference ability, wide linear range, high-precision, accuracy and other characteristics. In the choices of method, the conditions of analysis are optimized, such as the incidence wavelength, atomization pressure, incedence power, lifting capacity and so on. The detection limit of this way is 0. 002 4 μg/mL to 0. 38 μg/mL and its relative standard deviation value is 0.48 % to 0.80 %, which is applicable to the element analysis of water glass.