Hexavalent chrome is reduced to trivalent chrome by morpholine under high temperature conditions. Then morpholine content is calculated by detecting the absorbance of trivalent chromic ion.
吗啉在高温下将六价铬还原为三价铬，通过测定三价铬离子的吸光度，计算出锅炉给水中吗啉含量。
All the tra mi ion axle and rollers are made of high-quality steel with high-precision dynamic balance, plated with rigid chrome and grinded surface.
所有传动轴、辊材质均为优质钢，高精度动平衡校正，镀硬铬、表面研磨。
The results indicate that it has visible effect on restraining arc discharge and hollow cathode discharge as well as ion nitriding on high-chrome steel material surface.
结果表明，交流脉冲放电在抑制弧光放电和空心阴极效应方面是非常有效的，对于高铬钢材料表面的离子渗氮作用是明显的。
The main reason that results in the differences is the high concentration sulfate ion in the used chrome tan liquor.
循环铬液中高浓度硫酸根离子的存在是造成上述差异的主要原因。
Using the method of stepwise neutralization precipitation, the impurities of heavy metal ion in chrome plating effluent with high concentration are removed.
利用分步中和—沉淀方法去除高浓度镀铬废水中重金属离子杂质。
Using the method of stepwise neutralization precipitation, the impurities of heavy metal ion in chrome plating effluent with high concentration are removed.
利用分步中和—沉淀方法去除高浓度镀铬废水中重金属离子杂质。
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