shí / yàn / rén / yuán / bǎ / yàng / pǐn / róng / jiě / zài / shuǐ / xiàng / zhōng / zài / jìn / xíng / jiǎn / cè实验人员把样品溶解在水相中,再进行检测。The researchers dissolved the sample in the aqueous phase before testing it.