Using hydrochloric acid - nitric acid - hydrofluoric acid - perchloric acid digestion spodumene mixed sample, establish a method by inductively coupled plasma emission spectrometry spodumene lithium oxide content. Lithium element test to determine the analytical lines of Li 610.362nm, radial observation mode observation, lithium element to detect high-frequency power of 1.1kW, the atomizing gas flow 1.0L / min, peristaltic pump speed of 1.5mL / min , the medium of the sample solution concentration of 3% hydrochloric acid. Lithium oxide concentration is 0 ~ 50mg / L, the concentration of lithium oxide - line intensity curve linear correlation coefficient was 0.999 7; lithium oxide content detection limit of 0.007mg / L, the relative standard deviation (RSD) was 0.81%. This method has a low detection limit, high sensitivity, less interference, high accuracy, wide linear range, simple operation, can spodumene lithium oxide content of bulk samples of lithium accurate determination.

Detection of arsenic in the titanium dioxide, the majority sample pretreatment using nitric acid - hydrochloric acid - hydrofluoric acid dissolved mixed system, while processing a sample using this method, there will be easily hydrolyzed titanium and longer digestion problems. Experiments proposed sulfate - ammonium sulfate system was dissolved titania sample method, not only to solve the above problems and mild reaction, and accordingly established a method of hydride generation atomic fluorescence spectrometry (HG-AFS) Determination of titanium dioxide in the sample of arsenic. Experimental results show that the concentration of arsenic in 0. 50 ~ 20ug / L range corresponding to a linear relationship between the absorbance, linear correlation coefficient of 0. 9998, the detection limit was 0. 05 belly g / L. Interference tests showed that titanium sample matrix coexisting elements not interfere. A method for the analysis of samples of titanium dioxide, the measurement results and inductively coupled plasma mass spectrometry (ICP-MS) is consistent with the relative standard deviation (RSD, n = 11) less than 5%, force mouth recoveries ranged from 95% ~ 101%.

By hydride generation techniques selenium determination in geological samples, the samples need to be considered dissolved, Se valence of pre-reduction and suppression of interfering ions paper, nitric acid - hydrochloric acid - hydrofluoric acid - perchloric acid system quickly dissolve the sample, concentrated hydrochloric acid is added directly to boiling hexavalent selenium reduced to tetravalent selenium, a hydride generator with inductively coupled plasma emission spectrometer combined with measured uranium geological samples of trace selenium. other samples except Cu2 + ion levels were do not interfere with the determination of selenium by adding iron salt solution or test solution was added potassium ferricyanide in sodium borohydride reducing agent Cu2 + inhibits interference. the detection limit is 0.12μg / L, the precision (RSD) less than 5% compared with the previously reported methods, the method detection limit is low, the operation simple and quick, rinse 30 s to eliminate the memory effect, suitable for mass determination of trace uranium geological samples of selenium.