Plasma correction adjusts the plasma condition so that the plasma can be used under the same stable condition in any instrument.
When plasma correction is run, the sensitivity-oxide ratio profile is measured, and the correction value is set according to the individual instrument.
The term "Stable" here means a tuning condition in which the instrument has stable operation and allows accurate analysis for high-matrix samples.
At high altitudes, conventional s-lens plasma correction did not work correctly in MassHunter 4.3 or previous versions. The algorithm has been improved by introducing a feature that takes into account the range of make-up gas flow.
Do plasma correction in the following cases:
(However, if the same nebulizer unit is reused repeatedly by detaching and reattaching, it is not necessary to conduct the correction each time as long as the nebulizer is installed correctly.)
Once plasma correction is done, you won't need to do it again, when you use the instrument for normal measurement.
Be aware of the following considerations about plasma correction.
If a humidifier is used, dismount the humidifier before you run plasma correction. Even if the humidifier switch is set to the BYPASS side, the nebulizer gas (also called carrier gas) takes some time to respond. Therefore, the humidifier must be dismounted before you do plasma correction.
For details, refer to "Humidifier Connection (Seawater Analysis: Option)".
If the sampling cone or skimmer cone is contaminated, the sensitivity for high oxide ratio (cooler plasma condition) decreases. This prevents accurate plasma correction. To avoid this, clean the sampling cone and skimmer cone before you do plasma correction.