No abstract

Specimen for XRF analysis of high content of Ni, Ti and Nb in memory alloys, prepared by solution (a) and a filter paper disk (b).

Titanium was one of the main chemical components in Ni-Ti-Nb shape memory alloy. It has high content, narrow range and requires high precision of analytical method. In this study, diantipyrylmethane spectrophotometry was established for the determination of titanium in Ni-Ti-Nb shape memory alloy. The method major interference factors such as dissolve sample, absorption curve and the condition of color reaction were investigated and the analysis conditions of determining titanium were experimentally determined. Beers law was obeyed in the concentration range of 0mg/L ∼ 9.0mg/L of Ti. The relative standard deviation of was below 0.3% for the samples (n=6).

Abstract. According to JJF 1059.1-2012 of Evaluation and Expression of Uncertainty, uncertainty evaluation of measurement cadmium in copper aluminum alloy had proposed by photoelectric spectrometry. The sources of the measurement uncertainty were analyzed in the process of analysis and the corresponding mathematical model was established. The uncertainty of standard of A and B, the synthetic standard uncertainty, the expansion uncertainty and confidence interval of determined results were determined. The uncertainty of the B standard was the main source of uncertainty in the spectral analysis between uncertainty of class A and B, and the uncertainty of the sample properties was much larger than the uncertainty of other factors. The established method had certain model significance on the uncertainty evaluation of other substances measurement by spectroscopic method.

A simple, rapid and accurate spectrophotometric method was developed for the determination of chromium in V–Cr–Ti ternary alloy without any prior separation and chromogenic agent.