Inductively coupled plasma atomic emission spectrometry (ICP-AES), Determination of quantitative analysis of rare earth ore, niobium oxide, zirconium oxide, titanium oxide. Samples sodium hydroxide, sodium peroxide after dissolving a strong base after the separation of phosphorus, silicon, fluorine, aluminum and other elements and a large number of salt, precipitated with hydrochloric acid and hydrofluoric acid dissolved in ICP-AES determination of niobium, zirconium, titanium content. This method of measuring the impact of various factors were studied in detail, including the dissolution of the sample conditions interfering effect, recovery testing. Determined experimentally according to the characteristics of the rare earth mineral measurement range of each element was measured in the range: Nb2O50.07% ~ 0.20%; ZrO21% ~ 5%; TiO_20.1% ~ 4%, measurement results and determination of ICP-MS method consistent . Precision test results show that, RSD (n = 11) were less than 2.80.

Rhenium - osmium (Re-Os) isotopic system has a unique geochemical characteristics making it an important tool for Earth science research an irreplaceable, it has unique advantages in the tracer isotope geochemistry and dating aspect. However, due to geological samples Re-Os were very low, the development of more precise Re-Os chemical separation method and apparatus for analysis is one of the directions being geochemist efforts. Especially the Re-Os chemical analysis of geological samples if needed hydrofluoric acid residue dissolved silicate (siliceous) remains controversial, and therefore affect the system of Re-Os hydrofluoric acid(HF) sample is dissolved rock samples Re- Os isotopic analysis of the direction of one of the hot optimization, we were using a conventional tube Carlos (Carius tube, CT) was dissolved, and then treated with HF before Carlos tube (HF + CT) analysis of the six international geological reference materials, a detailed explanation desilication HF in geological sample analysis on the content and Re and Os isotopes. In the HF sample dissolution step, combined with the use of HF HBr + HCl HF contrast combination of HF Dissolving specific operations were refined. In the analysis of the sample is dissolved in HF siliceous, you can choose to use HF + HCl or HF + HBr two agents in combination, when the samples were transferred to Carlos tube was added diluent. Carlos was dissolved in a conventional tube and treated with HF and transferred to a first tube Carlos (HF + CT) two solutions like methods, six rock standard Re content have good repeatability, and change the content of the same sample of Os range are larger, indicating that the rock sample Re and Os have different modes of occurrence. The step of increasing the sample is dissolved hydrofluoric acid(HF) silica content makes the Re and Os has increased, 187Os / 188Os ratios also occurred some changes, especially basalt and andesite class samples. In this paper, PGE and Re-Os isotope systematics of closely related (PGE) and analysis of S carried out a useful exploration. Based on the existing analytical methods PGE make improvements, the development of a simple, accurate and suitable for environmental samples PGE-Re and Os isotopic content measurement method. And the use of analytical methods established international dust PGE reference material BCR-723 and five road dust samples from Guangzhou were PGE-Re and Os isotopic content.