小中大【转载】【求助】DPD测余氯标线总是不准啊怎么办
我用DPD分光光度法做余氯标线,碘酸钾标准溶液,PH测了是在7.1的样子,碘酸钾是分析纯的,水是实验室单蒸水,做出来相关性很差,斜率也偏高好多。浓度0,0.05,0.1,0.3,0.5,1.0,1.5,吸光度0.0029,0.0038,0.0503,0.2483,0.3587,0.6898,0.7918。中间几个数据吸光度好高,做了几次了都差不多,哪位高手能帮我分析一下啊,到底是哪里出了问题。谢谢了呀呀呀呀呀呀呀 我用DPD分光光度法做余氯标线,碘酸钾标准溶液,PH测了是在7.1的样子,碘酸钾是分析纯的,水是实验室单蒸水,做出来......