能量色散-X射线荧光光谱法测定光伏玻璃中铁含量

Determination of Iron in Photovoltaic Glass by Energy Dispersion X-ray Fluorescence Spectrometry

提出了X射线荧光能谱法测定光伏玻璃中铁含量。优化的仪器工作条件为:①PdMedium滤光片;②激发电压为20kV;③激发电流为1.08mA;④有效测量时间为100s;⑤总测量时间为200s。选用经火焰原子吸收光谱法对其含铁量定值的6个光伏玻璃样品作为校准样品。方法的线性范围为99.0～158mg.kg-1,检出限(3s)为11.5mg.kg-1。方法用于光伏玻璃实际样品分析,测定值与火焰原子吸收光谱法分析结果吻合,测定值的相对标准偏差(n=11)在4.5%～9.0%之间。

Energy dispersion X-ray fluorescence spectrometry （EDXRFS） was applied to the determination of iron in photovoltaic glass. The optimized conditions were as follows： （1） Pd Medium optical filter; （2） excitation voltage： 20 kV; （3） excitation current= 1.08 mA; （4） effective detection time： 100 s; （5） total detection time： 200 s. Six samples of photovoltaic glass with their iron contents determined by FAAS were selected for checking the results obtained by EDXRFS. Linearity range of the method was kept between 99.0--158 mg ·kg^-1, with detection limit （3s） of 11.5 mg ·kg^-1 The proposed method was applied to the analysis of photovoltaic glass, giving results in consistency with those obtained by FAAS. Values of RSD＇s （n=ll） found were in the range of 4. 5%-9.0%.