Analytic method for simultaneously determining percentage content of nine impurity elements in titanium sponge

Abstract

The invention discloses an analytic method for simultaneously determining the percentage content of nine impurity elements in titanium sponge. The nine impurity elements are Sn, As, Sb, Cr, Cu, V, Ni, Zn and Nb, five types of working curve standard solutions containing the nine impurity elements are prepared through a ti-based solution and a related reference solution, under the premise of determining the working parameters of the atomic emission spectrometer of an inductively coupled plasma, scanning is respectively performed on the five types of working curve standard solutions and a to-be-detected solution of titanium sponge, related spectral lines are selected as analysis spectral lines and background correction is performed on the analysis spectral lines, all related coefficients are higher than 0.995, detection limits are all below 0.00040 percent, except several analysis spectral lines of which the relative standard deviation is below 20 percent, the relative standard deviation of other analysis spectral lines are all below 10 percent, the requirements of a common micro trace analysis are met, the method provided by the invention can meet the requirements of analysis to the percentage content of the nine impurity elements in the titanium sponge, recovery tests show that the method is feasible, and a basis for quality grade of titanium sponge is provided.

Description

Technical field [0001] The present invention is the field of chemical element measurement technology, especially an analysis method for the simultaneous measurement of nine impurities elements in sponge titanium titanium.Copper CU, V, Ni Ni, zinc Zn, 铌 NB. Background technique [0002] Sponge titanium is widely used as the raw materials for production of titanium and titanium alloy, but the content of impurities such as SN, AS, SB, CR, CU, V, Ni, Zn, and NB directly affects the performance of titanium and titanium alloy.The level of sponge titanium purity also reduces its taste due to the existence of these impurities.If the percentage content of the titanium in the cavernous titanium can be detected, it is estimated that the percentage of all impurities elements in the cavernous titanium can also be estimated, but the error in the detection method of titanium titanium in the cavernous titanium can not yet meet the cavernous titanium titanium titanium.The purity judges other need...

AI Technical Summary

Problems solved by technology

[0005]1. Neither the national standard nor the American standard stipulates the analysis of As, Sb and Zn in sponge titanium;

[0006]2. The analysis scope of the national standard and the American standard cannot meet the needs of micro-trace impurity element analysis in sponge titanium, such as:

[0007] (1) For the determination of tin, GB / T 4698.1-96 uses potassium iodate titration to determine the amount of tin, and the test range is 1 to 12%; GB / T 4698.18- 96 The amount of tin is determined by flame atomic absorption spectrometry, and the test range is 1 to 5%; these two determination methods cannot be determined for sponge titanium with a tin content below 0.10%

[0008] (2) For the determination of vanadium, GB / T 4698.12-96 adopts ferrous ammonium sulfate titration method to determine the amount of vanadium. The test range is 1-15%. Vanadium below 0.10% cannot be measured

[0009] (3) For the determination of chromium, both GB / T 4698.10-96 and GB / T 4698.11-96 use ferrous ammonium sulfate titration to determine the amount of chromium, and the test ranges are both It is 0.3-12%, and the chromium content below 0.10% cannot be measured

[0010] (4) For the determination of niobium, nickel, aluminum, etc., the test ranges of the methods specified in GB / T 4698 are: Nb 0.20~3.0%, Ni 0.20~3.0% , 0.80-8.0%, none of which can meet the analysis requirements of low-content niobium, nickel and aluminum in sponge titanium

[0011] (5) GB / T 4698.21-96 is determined by DC arc emission spectrometry, which also includes the analysis of Ni, Cr, Sn, Cu, but because of its complicated operation steps and the need to The processed sample and carbon powder are mixed and ground according to a certain ratio, and then the cup-shaped carbon electrode is pressed for spectroscopic analysis. The linear analysis range of the method given in the standard is very narrow, and the analysis range is Ni 0.02-0.2%, Cr 0.02-0.2%, respectively. %, Sn 0.01~0.15%, Cu0.01~0.15%, for less than 0.02% Ni, Cr and less than 0.01% Sn, Cu and greater than 0.2% Ni, Cr and greater than 0.15% Sn, Cu cannot be measured , which also limits the application of GB / T 4698.21-96

[0014]3. The analysis speed is slow, which means that each element needs to be determined separately, with many steps and long analysis period

[0015] Using the same tester to simultaneously measure the content of nine impurity elements in sponge titanium: Sn, As, Sb, Cr, Cu, V, Ni, Zn, Nb Analysis methods have not seen related reports