Maintenance of gas control system by inductively coupled plasma emission spectrometer
Whether the gas control system of ICP is operating stably and normally, directly affects the quality of the measurement data of the instrument. If there are water droplets in the gas path, mechanical debris and debris, etc., the gas flow will be unstable. Therefore, the gas control system must be frequently checked. Inspection and maintenance. First do a gas test. Turn on the power switch of the gas control system to make the solenoid valve work, then turn on the gas cylinder and the pressure reducing valve to make the gas pressure indicate the rated ＆#118alue, then close the gas cylinder and observe the pressure on the pressure reducing valve. The pointer of the pressure gauge should not drop or drop very little within a few hours, otherwise there will be air leakage in the gas path, which needs to be checked and eliminated. Second, because the argon gas is often mixed with moisture and other impurities, some mechanical debris in the pipes and joints will fall off, causing the gas path to be blocked. Therefore, it is necessary to clean up regularly, unplug certain sections of the pipeline, then open the gas cylinder, and release the gas for a short period of time to blow out the water droplets and dust particles in the pipeline. When installing the gas pipeline, especially when connecting the carrier gas pipeline to the atomizer, be careful not to bend the tube too much, otherwise the unstable carrier gas flow will cause pulsation and affect the measurement.
Maintenance of Inductively Coupled Plasma Emission Spectroscopy Instrument on the Sampling System and Torch
The nebulizer is the most precise and critical part of the sampling system and requires good maintenance and use. Regular cleaning is required, especially after the determination of high-salt solutions, the top of the atomizer and the torch nozzle will accumulate salt, which will cause the aerosol passage to be unsmooth. This often reflects the decrease in the measurement intensity and the increase in the reflected power of the instrument. Dust or carbon deposits on the torch will affect the ignition of the plasma torch and its stability, and also affect the reflected power. Therefore, it should be washed regularly with acid, water, and finally, washed with absolute ethanol and blown dry. Always keep the sampling system and Cleaning of the torch.
Minimize the number of startup and shutdown during the use of inductively coupled plasma emission spectroscopy
Before starting the measurement, you must make arrangements and mark all the preparations in advance. Do not start and stop during the same period of time. Frequent opening of the instrument can easily cause damage. This is because the instantaneous current is greatly high every time the instrument is turned on. The current during normal operation, the instantaneous pulse impact, will easily cause the filament of the power tube to break, short circuit and premature aging, etc. Therefore, you need to pay more attention to it in use. Once it is turned on, it will be done in one go. Shut down midway.
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