1. Estimates of soil carbonate dynamics are still very scarce, despite their importance in the global carbon budget. Geochemical models used to estimate carbonate precipitation–dissolution rates require important inputs including carbonate content and calcite reactive surface area in soil as well as dissolved inorganic carbon (DIC) content in soil solution. However, most methods currently available to accurately measure these parameters can be time‐consuming and/or often require expensive laboratory equipment.
2. To tackle this problem, we aimed to develop a sensitive device to measure these variables at low cost and with little time investment. By taking advantage of the recent development of low‐cost CO₂ sensors and microcontrollers, a low‐cost and easy‐to‐mount analyzer was developed based on direct measurements of CO₂ evolved during an acidic reaction.
3. The new instrument proved to be sensitive, accurate, precise and able to quickly perform the analyses. It was therefore used in a pilot experiment on the inorganic component of CO₂ flows from crusted semi‐arid soils, and to evaluate the variation in DIC content through a spring‐cave‐downstream river water continuum.
4. The device could facilitate these analyses for scientists from different fields since it can potentially analyse any solid or aqueous sample.

中文翻译：

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开发一种新型低成本设备，用于测量碳酸钙含量，固体样品中的反应性表面积和水样品中的溶解性无机碳含量

1. 尽管其在全球碳预算中的重要性，但对土壤碳酸盐动态的估计仍然非常稀少。用于估算碳酸盐沉淀-溶解速率的地球化学模型需要重要的输入，包括土壤中碳酸盐含量和方解石反应表面积以及土壤溶液中溶解的无机碳（DIC）含量。但是，当前可用于精确测量这些参数的大多数方法可能很耗时，并且/或者经常需要昂贵的实验室设备。
2. 为了解决这个问题，我们旨在开发一种灵敏的设备，以低成本，很少的时间投入来测量这些变量。利用最新开发的低成本CO ₂传感器和微控制器，基于对酸性反应过程中产生的CO _2的直接测量，开发了一种低成本且易于安装的分析仪。
3. 事实证明，这种新仪器灵敏，准确，精确并且能够快速执行分析。因此，它被用于来自硬壳半干旱土壤的CO ₂的无机成分的中试实验，并通过春季-下游-下游河水连续体评估了DIC含量的变化。
4. 该设备可以潜在地分析任何固体或水性样品，因此可以帮助来自不同领域的科学家进行这些分析。