Recent developments in amplifier hardware enable low‐noise measurements of exceedingly small ion beams in isotope ratio analysis, yielding higher precision from smaller samples than ever before. To date, these amplifiers have largely been employed in thermal ionisation instruments, with few applications using plasma‐source (i.e., MC‐ICP‐MS) instruments. Here, we demonstrate the utility of these new generation 10¹³ Ω amplifiers in MC‐ICP‐MS, employing Pt isotopes as a case study, a system that could greatly benefit from the promised advances. The data demonstrate that for samples with low Pt abundance, for a modest increase in uncertainties, the amount of sample required can be reduced by a factor of 50–100. This technique thereby opens up new possibilities for analysis of samples that have low Pt mass fractions or were otherwise impossible to obtain in sufficient quantities.

中文翻译：

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1013Ω放大器在通过MC-ICP-MS测量低信号等离子体源同位素比中的应用：以Pt同位素为例的研究

放大器硬件的最新发展可以在同位素比分析中对极小的离子束进行低噪声测量，从而从较小的样品中获得比以往更高的精度。迄今为止，这些放大器已广泛用于热电离仪器中，很少使用等离子源（即MC-ICP-MS）仪器。在这里，我们演示了这些新一代的实用程序10 ¹³MC‐ICP‐MS中的Ω放大器，以Pt同位素为案例研究，该系统可以从承诺的进步中大大受益。数据表明，对于低Pt含量的样品，不确定性的适度增加，所需样品量可减少50-100倍。因此，该技术为分析低Pt质量分数或否则无法获得足够数量的样品提供了新的可能性。