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Hrinyes

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[求助] 流动注射问题 已有1人参与

我用流动注射测水样中的营养盐,一开始亚硝测定都可以 后来测硝,磷,硅出问题了,就是做天然样品加标,浓度偏高,而且空白浓度也比较高,磷都有10ppb了,这是怎么回事?

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提供信息太少。空白偏高是怎么回事?基线扣除的呀,是基线漂移了还是噪音变大了?观察标液信号峰怎么样?检查之前是不是换试剂导致的?是什么引起突然这样了?
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