Chemical oxygen demand is one of the important index in water monitoring. In this paper, the recent development for determination of chemical oxygen demand is briefly summarized.

化学需氧量是水质监测的一项重要指标。综述了化学需氧量的测定方法和研究进展。

youdao

Chemical process monitoring is of key importance for the safety of chemical process system.

化工过程状态监测是解决化工过程系统安全性的关键技术之一。

youdao

Early tests don't show substantial chemical contamination, but monitoring might have to continue for decades.

VOA: standard.2010.05.27

Thus far no effective means of monitoring chemical weapons production has been developed, in part because there are so many commercial chemical facilities that could be utilized for producing chemical weapons precursors.

CENTERFORSECURITYPOLICY: Summit Watch: Tough Questions For President Bush

At the time it said the hospital followed a "strict regime of continual chemical dosing, thermal disinfections and comprehensive monitoring of the extensive water distribution system".

BBC: Legionella bacteria

Examples: Sensors to sniff potential chemical weapons will improve industrial processes and environmental monitoring.

FORBES: The Security-Industrial Complex