Method for determining full titanium content according to acid-soluble titanium content in tire cord steel control sample

Abstract

The invention discloses a method for determining full titanium content according to acid-soluble titanium content in a tire cord steel control sample. The method comprises the following steps: step one, taking a test article from a sample, and determining the acid-soluble titanium content Ci by using ICP-MS; step two, using a spark spectrometer for the excitation of a sample analysis surface, and using a single-spark technology for collecting spectral pulses in a titanium element channel; step three, using 3 sigma criterion for removing abnormal pulses of acid-insoluble titanium, and calculating the average Ii of normal pulses of the acid-soluble titanium; step four, drawing a calibration curve, and performing multiple regression on Ci and Ii to obtain a regression equation that Ci equals to the sum of A0 and A1*Ii, wherein A0 and A1 are multivariate regression coefficients respectively; step five, calculating the average I(t)i of all single-spark pulses, and calculating the full titanium content according to the following equation: C(t)i equals to the sum of A0 and A1*I(t)i. According to the method provided by the invention, the method can accurately determine the full titanium content in the control sample, reduce the cost of enterprises, and be widely applied to the field of sample analysis.

Description

technical field [0001] The invention relates to the field of sample analysis, in particular to a method for determining the total titanium content by controlling the content of acid-soluble titanium in a sample of cord steel. Background technique [0002] During the smelting process of cord steel, it is necessary to accurately analyze the content of total titanium (the sum of acid-soluble titanium and acid-insoluble titanium) in the sample, so the spark spectrometer should be calibrated more accurately with the control sample. The control samples will be gradually consumed during use and need to be supplemented by making new control samples continuously. If imported high-level standard samples are used as control samples, the cost is too high and cannot be afforded in large-scale production. Therefore, samples with uniform composition and appropriate content are usually selected from production samples and determined by standard analysis methods as control samples. [0003]...

AI Technical Summary

Problems solved by technology

[0006] The process of dissolving samples with superior pure nitric acid is simple, and the amount of impurities in nitric acid has little effect on the analysis results. However, samples dissolved in single nitric acid can only be used for the analysis of acid-soluble titanium, and the required all-titanium cannot be obtained.

Therefore, the prominent problem encountered in the production process of cord steel control samples is that there is no suitable standard method to directly determine the value of all titanium

Images