标准测定

Requirement and processing method of the experimental water used in the process of Permanganate Index through analyzing the measurement result of standard sample.

简单介绍了高锰酸盐指数测定中对实验用水的要求及实验用水的处理方法，通过对七个标准样品的实验测定及讨论。

There is often difference in the determination of permanganate index between using automatic monitoring device and the national standard method.

水质自动站测定的高锰酸盐指数数据与实验室标准方法测定结果常常产生较大的偏差。

The test results showed its deviation was less than 0.0210%~0.031 7%, conforming to the State's permissible error.

测定结果表明，铝相对标准偏差小于0.020%～0.317%，测定结果符合国家标准允许偏差。

Polarimetry, the measurement of optical rotation, of a pharmaceutical article may be the only convenient means for distinguishing optically active isomers from each other and thus is an important criterion of identity and purity.

药用物质的旋光测定法，即测定光学旋转的方法，也许是用于区分具有光学活性的异构体的方法中唯一简便的方法。因此，该方法是鉴别和纯度的一个重要标准。

Based on the method of standard curve, the mathematical model of evaluation on uncertainty for determination of SudanⅠ in food by single scan polarography has been established in this paper. The related components of uncertainty were analyzed.

本文依据标准曲线法建立了单扫描极谱法测定食品中苏丹红Ⅰ的不确定度评定的数学模型，对影响测量结果的不确定度分量进行了分析，较全面地评定了测定结果的不确定度。

Of uncertainty were analyzed. A comprehensive evaluation on uncertainty of measured results of SudanⅠ in food by single scan polarography was carried out.

本文依据标准曲线法建立了单扫描极谱法测定食品中苏丹红Ⅰ的不确定度评定的数学模型，对影响测量结果的不确定度分量进行了分析，较全面地评定了测定结果的不确定度。

It was applied to analyze the structures of ashless dispersants and their derivatives. The results were obtained and correlated. The molecular weight distribution and dipersity of ashless dispersant, number of polyisobutene R and polymeric degree of R polymerism in addition agent were obtained.

以Ultrastyragel为固定相，四氢呋喃作流动相，用普适标准校正曲线及凝胶渗透色谱法对无灰分散剂及其对应衍生物的结构进行了分析测定，并将测定结果相关联，计算出了无灰分散剂的相对分子质量分布、分散度及添加剂所含聚异丁烯R基的个数及R基聚合度。

In the experiment, the study on result of measurement of COD by potassium dichromate method has been conducted in the aspect of impact and application scope, proposing the method of measuring low COD in waste water of high chlorine and putting forward new comment on its influence factor.

本试验采用重铬酸钾标准法对COD测定结果的影响程度与适用范围进行了探索，提出了用低浓度重铬酸钾氧化法测定含高氯根废水中低COD的方法，对其影响因素提出新的看法。

The experimental procedure were predigested under the condition that did not effect the experimental results by using alkal potassium persulphate oxidation -ultraviolet spectrophotometry to determine the total nitrogen in water sample with first water instead of redistillation non-ammonia water.

经实验证明，用碱性过硫酸钾氧化-紫外分光光度法测定水样中的总N，以一次蒸馏水代替重蒸馏无氨水，既减少了实验操作程序，又不影响测定结果，同时本文确定了最佳实验条件，并对标准样品进行分析，结果理想。

The results showed that its maximum relative error of 2.82%, the relative standard deviation of 0.48% when determining the same sample. The method has good veracity and precision.

结果表明，测定样品的最大相对误差为2.82%，重复测定同一样片的相对标准偏差为0.48%，方法的准确性和精密度良好。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。