Weighing filtration membrane is often used to get the dust concentration of environment.However,this method is discommodious and can not get the instantaneous transformation of dust concentration.

环境粉尘的测定一般使用滤方法测得,该方法费时费力,且不能得到瞬时粉尘的变化。

The relation ship between the salivary and the blood Diphenylhydantoin (DPH) Levels in the epileptic (EP) patients with oral dosing DPH were studied.

目的研究服用苯妥英钠（DPH），癫痫（EP）患者唾液与血DPH关系，探讨测定唾液DPH替代血药的可行性。

A method for the determination of trace cations in the tetramethylammonium chloride was developed by ion chromatography(IC) with conductivity detector.

文章采用离子色谱法测定高四甲基氯化铵钠、钾和钙金属离子。