4种重金属离子对间接火焰原子吸收光谱法测定铝的干扰

Interference of four kinds of heavy metal ions on determination of aluminum by indirect air-acetylene flame atomic absorption spectrometry

空气-乙炔间接火焰原子吸收法是我国目前运用较多且易于推广的铝检测方法,研究了Mg2+、Ca2+、Zn2+和Ni2+4种离子对此法测定0.40 mg/L Al3+的干扰情况。得出如下结论:(1)在±5%误差范围内,15.10 mg/L Mg2+、105.00mg/L Ca2+、0.23 mg/L Zn2+、0.88 mg/L Ni2+对0.40 mg/L Al3+无干扰。(2)本方法虽然操作复杂,但成本较低、灵敏度高,检测的浓度范围宽、稳定性好,加标回收率为96%~99%,检出限为0.04 mg/L,适宜测定范围为0.05~100.00 mg/L,适用于饮用水、河水及地下水中Al3+的测定。

Indirect air-acetylene flame atomic absorption spectrometry is the widely used detection method and can be easily popularized for determination of aluminum in China.The interference of Mg2 +,Ca2 +,Zn2 +,Ni2 +to the measurement of Al3 +(0.40 mg/L) were studied separately.The results showed that:(1) no-interference concertration limitation of Mg2 +,Ca2 +,Zn2 +and Ni2 +for the determination of the solution Al3 +(0.40 mg/L) were 15.10 mg/L,105.00 mg/L,0.23 mg/L and 0.88 mg/L,respectively within the scope of ± 5% error.(2) Despite of its complex operation,this method has been characterized by lower cost,higher sensitivity,wider detecting concentration and better stability.Considering the recovery rate(96% ~ 99%),detection limitation(0.04 mg/L) and measurement range(0.05 ~ 100 mg/L),this method is suitable for determining of Al3 +in the drinking water,river water and underground water.