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The aim is to improve thallium (Tl) purification methods for more precise isotopic measurements.

March 30, 2026Solid Earth SciencesOpen Access

An improved method of Tl purification for high precision measurement of Tl isotopes by MC-ICP-MS

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Demonstrates an enhanced purification method for thallium isotopes, ensuring accurate analysis and reduced contamination in geochemical applications.

The aim is to improve thallium (Tl) purification methods for more precise isotopic measurements.
Developed a dual-column purification system using AG 1-X8 and AG 50W-X12 resins.
Conducted isotopic measurements using a Nu Plasma II MC-ICP-MS with Pb as an internal standard.
Monitored and analyzed NIST SRM 997 and ferromanganese nodule samples for accuracy.
Achieved ultra-low procedural blanks for Tl (<1 pg) and Pb (<13 pg).
Long-term reproducibility of ε 205 Tl for the NIST 997 standard was 0.0 ± 0.7 (2SD, n = 214).
Results for NOD-A-1 and NOD-P-1 reference materials aligned well with previous published data.

Yan et al. (2026) studied this question.

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Demonstrates an enhanced purification method for thallium isotopes, ensuring accurate analysis and reduced contamination in geochemical applications.