Abstract:There are many symbiosis and associated elements in tungstannic tin ore. In order to overcome the cumbersome and inefficient detection process of 8 elements in common tungstannic tin ore, such as tin, tungsten, molybdenum, copper, lead, zinc, sulfur and arsenic, the silica in the sample was volatilized by adding hydrofluoric acid directly into the corundum crucible, and the silicon removed sample was fused with sodium peroxide, and then extracted with tartric acid + phosphoric acid + hydrochloric acid. The effect of silica gel and the instability of tungsten and tin in sample solution of alkali melt acidification were solved. A method for the direct determination of tin, tungsten, molybdenum, copper, lead, zinc, sulfur and arsenic in samples by inductively coupled plasma emission spectrometry (ICP-OES) was established. The influence of sodium peroxide flux dosage on each element was systematically studied. The complexation of single tartric acid and the influence of mixed acid of tartric acid and phosphoric acid on each element were investigated. The results showed that the sample could be completely decomposed when the dosage of sodium peroxide was 1.0 g. The complexation of single tartric acid is limited, and the samples with high tungsten content are easy to precipitate, while the mixed acid of tartric acid and phosphoric acid can stabilize tungsten in the solution for a long time, but has no effect on other elements. Five national first-class reference materials of tungsten and tin ores were selected for treatment according to this method, and the measured results were all within the error range of the confirmed values. Four actual samples were compared with the standard method, and there was no significant difference in the detection results of each element. The spectral intensities of each element showed a good linear relationship in the concentration range of 0 ~ 200 μg/mL, and the correlation coefficients (r) were above 0.999 9. The detection limits of the method were 3.0μg/g ~ 25.0 μg/g, and the relative standard deviations (RSDS) (n=12) were 0.33% ~ 7.0%. Methods The test process is simple, the test results are accurate and reliable, and it has obvious advantages in the multi-element sample detection.