The optimal conditions for determination of mercury in water by coldvapour generation atomic fluorescence spectrometry and for sample digestion with potassium permanganate are described.
研究了以高锰酸钾消化，冷原子荧光法测定水质中汞的最佳测定条件。
2
The engine is cold and there is no vapour lock in the pipe.
发动机很冷，管道中也没有封。
3
This is because the top of the troposphere is normally very cold, causing ascending water vapour to freeze into ice crystals that drift and fall, rather than continuing up into the stratosphere.