Potassium fluoride,anhydrous
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           Fluorosilicic Acid
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           Magnesium fluorosilicate
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Polymetallic ore samples with complex matrix characteristics, selenium, tellurium element in low abundance in nature, if not its effective pre-treatment, direct decomposition of the sample is measured, so will cause inaccurate results and instrument contamination. First experiments using nitric acid - hydrofluoric acid - perchloric acid decomposition polymetallic ore samples, and then in hydrochloric acid medium, with copper as a contact agent, using sodium hypophosphite to restore arsenic, selenium and tellurium into a co-precipitation after a single substance, to achieve selenium and tellurium with other elements of separation, eliminating the matrix effect, the system uses the heat of solution of nitric acid precipitation, using inductively coupled plasma mass spectrometry (ICP-MS) were measured to establish a method for determination of polymetallic ores selenium and tellurium. The results show that the choice of cesium (133 Cs) for the calibration curve and volatility drift, selenium, tellurium element of internal calibration matrix effects and instrument signal correlation coefficient up to 0.999, the detection limits were 0.004,0.003ng / mL. The experimental method was applied to determination of polymetallic ores actual samples, measurement results with hydride generation - atomic fluorescence spectrometry (HG-AFS) are basically the same. The method was applied to determination of polymetallic ores standard substance, selenium, tellurium determination with the certified values coincide, the relative standard deviation of selenium and tellurium (RSD, n = 7) were 1.2% to 8.5%, 1.1% to 6.2%.

Samples were dissolved in the mixture of nitric acid - hydrofluoric acid - perchloric acid, adjust the pH with ammonium chloride, a buffer solution and the pH value of the solution is maintained at 10 to 11, iron, cobalt, nickel and other elements interfere with precipitation, select Cd 228.802nm as analytical line, and set the appropriate background subtraction position by inductively coupled plasma atomic emission spectrometry (ICP-AES) Determination of cadmium in geological samples. The concentration of cadmium in 0.000 176 ~ 0.160 mg / L range with its emission intensity linear correlation coefficient r = 0.999 8. The detection limit of cadmium is 0.06μg / g. Experimental methods for the determination of cadmium in two geological standard samples, the results of the relative standard deviation (RSD, n = 12), respectively, 2.3% and 3.2%. Determination of cadmium in geological standard samples, and the results of experimental methods in accordance with the certified values.

Use salt and sodium mixed acid + hydrofluoric acid to dissolve the sample, hydrobromic methods other volatile antimony, antimony avoid high levels of instability and interfere with the determination of thallium in solution using Inductively Coupled Plasma Mass Spectrometry in the lead-antimony concentrate thallium content. Lead-antimony concentrate after the first treatment, the sample solution antimony residues were less than 10μg / m L. Choose iridium as an internal standard, the method applied to the sample of thallium, the relative standard deviation of less than 5%, and the recovery was 97.2% ~ 107%, choose six laboratories co-verification, no significant difference between the statistical test by test results . The method for the determination of lead-antimony concentrate thallium.