Answers to questions about using the Optical Emission Spectrometer

6. Can't the negative high pressure be added? The main reason why the high pressure cannot be added is caused by the vacuum of the instrument.  

7. What kind of sparks are good for copper-based analysis?  As far as the current situation is concerned, high-energy pre-spark pre-ignition is used, spark analysis is medium content, arc analysis is low content.  

8. There is no small difference in the excitation energy of the Optical Emission Spectrometer every day. The analysis is not very stable. What is the reason?  (1) Except for human factors, the main cause of instrument instability is temperature and humidity.  Therefore, if you want to make the Optical Emission Spectrometer in the best condition, it is necessary to ensure its working environment.  (2) Another possible reason for the instability of the Optical Emission Spectrometer is the ground wire.  

9. It has been about half a year since the development of the spectrometer to the actual operation.  Today, I have a problem that I have never encountered before. It can work normally before 10 am. When the sample is made again, the instrument has a low value of all elements.  what is the reason?  (1) If there is not much drop, standardize the instrument.  (2) Check whether the lens of the instrument is contaminated and whether the ash discharge is smooth; (3) The quality of argon gas has a large decrease in intensity. Generally, it is caused by the poor quality of argon gas.  Gas cylinder.  Generally, this kind of problem does not occur on the instrument hardware. It is more likely that it is related to the maintenance of the operator and the associated equipment.

       10. When analyzing the lead content in pure zinc, I found that the analysis accuracy is not good, the results are high and low, and the elements such as iron and cadmium are quite stable. What could be the reason?  (1) Purity of processed samples and gases.  (2) Whether the lens is clean.  (3) How about each absolute intensity?  In particular, how much did the strength of the substrate decrease?  (4) Is the sample control stable?  Ventilation, lens cleaning, standardization.  If the sample is stable, the sample is not uniform.