yán / jiū / rén / yuán / yòng / sè / pǔ / fǎ / fēn / xī / shuǐ / yàng / zhōng / de / huà / xué / chéng / fèn研究人员用色谱法分析水样中的化学成分。The researchers used chromatography to analyze the chemical components in the water sample.