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How to determine the content of 19 elements in titanium and titanium alloys?

Titanium and titanium alloys are important metal materials widely used in aerospace, medical, chemical, metallurgical, marine engineering and other fields. China's titanium and titanium alloy production capacity ranks among the top in the world, but due to the overall low grade and unstable quality of titanium materials, high-end titanium and titanium alloys still need to be imported. The reason for poor quality of titanium materials is not only due to technical and technological factors, but also due to important factors such as testing methods, among which sample pretreatment is the most critical step. Developing a sample pretreatment method that can simultaneously determine multiple elements in titanium and titanium alloys has an important promoting effect on improving detection efficiency.
Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES) can simultaneously determine multiple elements and is widely used. At present, the standard methods for determining the above elements in titanium and titanium alloys include GB/T 4698 series, SN/T 3910-2014 "Determination of Manganese, Chromium, Nickel, Aluminum, Molybdenum, Tin, Vanadium, and Copper in Sponge Titanium, Titanium, and Titanium Alloys by Inductively Coupled Plasma Emission Spectroscopy", YS/T 1262-2018 "Chemical Analysis Methods for Sponge Titanium, Titanium, and Titanium Alloys Determination of Multi element Content by Inductively Coupled Plasma Atomic Emission Spectroscopy", etc. These standard methods all use hydrochloric acid hydrofluoric acid nitric acid or sulfuric acid hydrofluoric acid nitric acid systems to dissolve the sample in a beaker, and require that the dissolution temperature should not exceed 70 ℃, otherwise it will cause the loss of volatile elements such as Si and Cr, resulting in low measurement results. Researchers used a mixed solution of hydrochloric acid hydrofluoric acid nitric acid perchloric acid as the digestion acid system, microwave digestion of titanium and titanium alloy samples, and simultaneous determination of 19 elements in titanium and titanium alloys by ICP-AES. The method not only reduces acid consumption, but also minimizes the loss of the tested elements, improves the accuracy of the measurement results, and is conducive to energy conservation and emission reduction.

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