It is necessary to solve openning-tube sampling problem for the mass-spectrometer analysis of residual gases in sealed vacuum devices.
密封真空器件内残气的质谱分析，必须解决开管取样技术问题。
2
The amount of residual dichlorvos could be accurately detected by high performance liquid chromatography. After all, the instantaneous vacuum was feasible to remove residual dichlorvos.
脉冲负压技术可以有效的脱除黄瓜中敌敌畏农药残留，高效液相色谱法适用于黄瓜中敌敌畏农药残留的检测。
3
Some work on residual gas analysis for vacuum system of NSRL electron storage is to be described.