重铬酸钾

The round trip flow time is cut short from two hours to ten minutes and the method adopts silver nitrate-bismuth nitrate united screening method to eliminate the disturb of chorine ion instead of strenuous noxious mercury sulfuric.

本方法适当提高硫酸浓度，强化了重铬酸钾的氧化效率，使回流时间由 2h缩短到 10min ；并且用硝酸银和硝酸铋联合掩蔽法能消除氯离子的干扰，代替剧毒的硫酸汞。

A fixed ration of K2Cr2O7-H2SO4 reacts with rock salt under the heating condition, and chromyl chloride is produced.

中文摘要：研究了采用重铬酸钾返滴定法测定岩盐中的氯化钠。

The main methods are: glass-electrodes method, potassium dichromate method and statistical method.

采用的主要方法有：玻璃电极法，重铬酸钾法，统计学方法等。

The paper will focus on the study of potassium dichromate simulating waste water and real chromium residue.

本论文以重铬酸钾模拟废水和实际废渣为研究对象，探索性地开展了以下几个方面的工作。

In this paper,by the University has been the chemical knowledge of the potassium dichromate has no mercury titration experiment, given the conditions and the determination of reliable analytical methods.

本文应用大学已获得的化学知识，对已有的重铬酸钾无汞滴定法进行实验研究，给出了测定条件和可靠的分析方法。

Potassium dichromate was chosen as the pollutant and its initial concentration was 500mgkg^(-1) Kaolin.

试验选用重铬酸钾作为污染物，配制高岭土中Cr初始质量分数为500mgkg^(-1)。

The comparison of monitoring COD in water with rapid monitoring method and potassium dichromate method is finished.

比较了快速测定法与国家标准方法重铬酸钾法(GB11914-89)测定化学需氧量。

Potassium dichromate was replaced by ceric sulfate as oxidant to determine the COD in this study.

采用硫酸高铈作为氧化剂来测定难降解垃圾渗滤液的COD，测定结果与重铬酸钾法进行比较。

Results of organic mass spectrometry analysis of East Lake, Wuhan showed the applicability of potassium dichromate method in eutrophic waters.

根据东湖水样的有机质谱分析结果，重铬酸钾法测定富营养化水体的适用性在文中得到论证。

Fuse polassium dichromate (19) in a porcelain crucible .

熔重铬酸钾（19）在瓷坩埚中。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。