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Ila, P.; Frey, Frederick A.

doi:10.1023/a:1006765300343

Cited by 17 publications

(1 citation statement)

References 3 publications

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“…To validate these conclusions, we also compared the compositional results acquired by the initial sample powder after 2 h of digestion with the results after 5 days of digestion. These were also compared with the results after 2 h of digestion of the ultrafine sample powder and the reference values. ,,,− For all three granitoid samples, the Zr results of the 2 h digestion of the ultrafine powder align well with the 5 days digestion results of the initial powder, both of which are significantly higher than the 2 h digestion results of the initial powder (see Figure S5 and Table S6). For GSP-2, the Zr and Hf results after the 2 h digestion of the ultrafine powder are consistent with the 5 days digestion results of the initial powder and the reference values (see Figure S6 and Table S6).…”

Section: Resultsmentioning

confidence: 75%

Rapid and Complete Digestion of Refractory Geological Samples Using Ultrafine Powder for Accurate Analyses of Trace Elements

Liu,

Guo,

et al. 2024

Anal. Chem.

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Complete sample digestion is a prerequisite for acquiring high-quality analytical results for geological samples. Closed-vessel acid digestion (bomb) has typically been used for the total digestion of refractory geological samples. However, the long digestion time (4−5 days) and insoluble fluoride complexes still pose challenges for digesting refractory geological samples using this approach. In this study, an efficient and simplified digestion technique combining ultrafine powders from planetary ball milling with bomb digestion was developed for trace element analysis of refractory geological samples: peridotite and granitoid. The method shows two significant improvements compared with previous approaches. (1) By performing dry planetary ultrafine milling, the initial 200 mesh peridotite (<74 μm) could be reduced to 800 mesh (<20 μm) in 6 min at a ball-to-powder mass ratio of approximately 15 using 3 mm tungsten carbide milling balls. (2) Complete peridotite and granitoid dissolution were achieved in approximately 2 h, 60 times faster than what is achievable using previous methods (2 h vs 120 h). Moreover, ultrafine powders effectively suppressed insoluble fluoride formation during bomb digestion. A suite of peridotite and granitoid reference materials were measured to evaluate the stability of this method. This efficient, simple, and reliable sample digestion method could benefit geological, food, environmental, and other fields requiring solid sample decomposition via wet acid, fusion, combustion, or dry ashing.

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