The accurate determination of Cr(VI), the most hazardous form of chromium, is an analytical challenge because of its facility to be reduced during all steps of the analytical procedure. This review presents a synthesis of the available studies for the analysis of Cr species in different solid samples (soils/wastes, working atmosphere, industrial and food samples). A particular attention has been paid on Cr(III) and Cr(VI) interconversions that can occur during extraction and efforts made to avoid these reactions. Although the use of NaOH/Na₂CO₃ solutions with heating at 90–95°C is the more widespread procedure, species transformation can still occur and several studies suggest that speciated isotope dilution (SID) could be a suitable tool for correction of these interconversions.

Cr（VI）是最危险的形式的铬，由于要在分析过程的所有步骤中都减少其使用量，因此准确测定Cr（VI）是一项分析挑战。这篇综述介绍了可用于分析不同固体样品（土壤/废物，工作环境，工业和食品样品）中Cr种类的现有研究的综述。在萃取过程中可能发生的Cr（III）和Cr（VI）互变特别注意，并已做出努力避免这些反应。尽管在90-95°C加热下使用NaOH / Na ₂ CO ₃溶液是更普遍的过程，但仍可能发生物种转化，并且一些研究表明，指定同位素稀释（SID）可能是校正这些问题的合适工具。相互转化。