1) potassium dichromate method passivation
重铬酸钾法钝化
2) potassium dichromate oxidation titration
重铬酸钾氧化法
1.
Determination of Organic carbon in organic-inorganic compound fertilizers by potassium dichromate oxidation titration,in order to overcome the interference of carbon in urea,the test showed it was silitable when the heating temperature is controlled at 100℃,the consistency and the volume of potassium dichromate is 0.
用重铬酸钾氧化法测定有机无机复混肥中有机质的含量 ,为消除测定过程中尿素中碳的干扰 ,确定了实验条件 :重铬酸钾溶液的浓度 0 。
3) potassium dichromate method
重铬酸钾法
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。
2.
Based on the operation and management experience of on-line COD_(Cr) analyzer,several suggestions are put forward,including replacing ferrous ammonium sulfate by potassium hydrogen phthalate as range-measured solution,replacing zero offset by beginning offset,and inspecting the compatibility of analyzer to water quality when the potassium dichromate method is not used.
根据水质CODCr在线分析仪运行管理工作的经验,提出以邻苯二甲酸氢钾代替硫酸亚铁铵作为量程测定液,以始点漂移代替零点漂移,以及对于非重铬酸钾法测定CODCr仪器检验,要考察其对水质的适应性的几点建议。
3.
the improved method had advantages of fewer quantity of acid,less heating time and low cost over the potassium dichromate method of national standard.
废水中化学耗氧量的测定 ,国标用重铬酸钾法 ,该方法不仅酸介质用量大 ,而且需 2h加热。
4) potassium dichromate
重铬酸钾法
1.
Discussion of influencing factors on COD_(Cr) determination in industrial waste drainage by potassium dichromate;
用重铬酸钾法测定工业废水中COD_(Cr)影响因素的探讨
2.
Rapid determination of COD in water sample by using potassium dichromate;
改进重铬酸钾法快速测定水样CODcr
5) dichromate method
重铬酸钾法
1.
The common methods to measure include dichromate method which is used to determinate the more serious pollution of industrial waste water; and permanganate method which is applicable to the determination of surface water pollution and sewage.
常用的测定方法有重铬酸钾法和高锰酸钾法,前者适用于测定污染较为严重的工业废水,后者适用于测定污染较轻的地表水和生活污水。
6) passivate
[英]['pæsiveit] [美]['pæsəvet]
铬酸钝化
补充资料：重铬酸
分子式：H2Cr2O7
CAS号：
性质：又称焦铬酸(pyrochromic acid)，重铬酸。游离状态未得到。已知在氧化铬(VI)的水溶液中H2Cr2O7与H2CrO4保持平衡。在此情况下，若氧化铬(VI)的浓度小，二铬酸的浓度亦小。氧化铬(VI)浓度增大，二铬酸浓度也增大。若氧化铬(VI)浓度更高，溶液中存在三铬酸H2Cr3O10和四铬酸H2Cr4O13。将三氧化铬溶于水便能得到含H2Cr2O7和H2CrO4的混合溶液，酸化此溶液便能制得含量高的二铬酸溶液。用作强氧化剂。
CAS号：
性质：又称焦铬酸(pyrochromic acid)，重铬酸。游离状态未得到。已知在氧化铬(VI)的水溶液中H2Cr2O7与H2CrO4保持平衡。在此情况下，若氧化铬(VI)的浓度小，二铬酸的浓度亦小。氧化铬(VI)浓度增大，二铬酸浓度也增大。若氧化铬(VI)浓度更高，溶液中存在三铬酸H2Cr3O10和四铬酸H2Cr4O13。将三氧化铬溶于水便能得到含H2Cr2O7和H2CrO4的混合溶液，酸化此溶液便能制得含量高的二铬酸溶液。用作强氧化剂。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条