ICP-AES法测定凤阳县灵山-木屐山矿区硅质原料中三氧化二铬和二氧化钛含量的应用讨论

Discussion on the application of ICP-AES in determination of chromium trioxide and titanium dioxide in siliceous materials from the Lingshan-Mujishan mining area, Fengyang County

本方法(ICP-AES)试样经盐酸、硝酸、氢氟酸、高氯酸冷溶过夜,次日加热分解并溶解盐类后,转移至50mL容量瓶中定容。采用电感耦合等离子体发射光谱仪测量试样溶液中铬(铬267.716{126}nm光谱线)和钛(钛323.452{104}nm光谱线)的特征光谱强度,由仪器自动校正基体的影响,计算试样中三氧化二铬和二氧化钛的量[1]。本方法(ICP-AES)三氧化二铬和二氧化钛的精密度分别为8.88%、5.47%(RSD,n=11)。

The samples were cold-dissolved in hydrochloric acid, nitric acid, hydrofluoric acid and perchloric acid overnight,which were heated the next day until they were decomposed and dissolved, and then transferred to a 50mL volumetric flask by constant-volume operation. The characteristic spectral intensities of chromium(chromium 267.716{126}nm spectral line) and titanium(titanium 323.452{104}nm spectral line) in the sample solution were measured by inductively coupled plasma-atomic emission spectrometer(ICP-AES), which automatically corrected the influence of matrix and calculated the amount of chromium trioxide and titanium dioxide in the sample[1]. The precisions of ICP-AES for chromium trioxide and titanium dioxide were 8.88% and 5.47%(RSD, n=11), respectively.