Titration error formula and feasibility judgment in stepwise titration of strong and weak acid mixture.
本文从一元强酸与弱酸滴定的误差公式判断用强酸进行分步滴定的可能性。
The derivation of acid base titration error formula is a difficult point as well as an important point in teaching analytical chemistry.
酸碱滴定误差公式的推导是分析化学教学的一个难点，也是一个重点。
This paper points out noticable problem and provides relevant solving methods to the appearance error during daily measurement working, according to the acid rain observing professional standard.
根据酸雨观测业务规范，针对日常测量工作中容易出现的误差，指出应当注意的问题及提出相应的解决办法。
In regard to the yields of flavones and pcoumaric acid, the effects of the three extraction methods show no significant difference, which is mainly the test error.
三种提取工艺对黄酮和对香豆酸的提取率差别不大，测试结果的差异为试验误差。
The recovery per cent of the standard addition ofp-Fluorobenzoic acid for this procedure equals 99.9%, the relative standard error is 2.72%.
对氟苯甲酸加标回收率为99.9%，对氟聚苯乙烯分析结果的相对标准偏差为2.7%。
The recovery per cent of the standard addition ofp-Fluorobenzoic acid for this procedure equals 99.9%, the relative standard error is 2.72%.
对氟苯甲酸加标回收率为99.9%，对氟聚苯乙烯分析结果的相对标准偏差为2.7%。
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