shí / yàn / rén / yuán / tōng / guò / bǐ / sè / fēn / xī / cè / dìng / le / róng / yè / zhōng / de / tiě / hán / liàng

实验人员通过比色分析测定了溶液中的铁含量。

The laboratory staff determined the iron content in the solution through colorimetric analysis.