Метод ізотопного розбавлення для визначення вмісту бору в неіржавній сталі з використанням ICP MS

• Date: 2025
• Main Authors: Afanasieva, I.O., Afanasiev, S.N., Kutnii, D.V., Vanzha, S.O., Burdeinyi, D.D., Rud’, N.V., Medvedev, O.V.
• Format: Article
• Language: English; Ukrainian
• Published: Publishing house "Academperiodika" 2025
• Subjects: метод iзотопного розбавлення; мас-спектрометр; борована неiржавна сталь; iзотопи бору
• Online Access: https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2023660
• Journal Title: Ukrainian Journal of Physics

To determine the boron content in borated samples of corrosion-resistant chromium-nickel stainless steel, the isotope dilution method is proposed, which is an internal standard method. The study was performed on 10 boron-alloyed stainless-steel samples with a natural isotope ratio using an inductively coupled plasma mass spectrometer. As an internal standard, elemental amorphous boron powder with a 10B isotope ratio up to 95.0% is used. For comparison, mass spectrometric measurements of the boron content in the same samples are additionally performed using the calibration solution method, which is an external standard method. In this case, the boron content is determined as the ratio of the boron intensity to the total intensity of all elements in the sample. It is found that the results of both internal and external standard methods are qualitatively identical. However, the isotope dilution method turned more accurate for determining elemental concentrations, and its results are not affected by non-spectral interferences associated with the drift of instrument sensitivity over time and the matrix effects, since the isotope ratio rather than the absolute isotope concentrations is measured.