If you are talking about the stabiliztion time in the sample intruduction: case 1: if you have an ISIS introduction system, the stablization can be short as 5 second. case 2: if you donlt have an ISIS introduction system, the tubing needs 12 seconds to return back to its normal state after stretched in the fast pump mode. the stablization time is nromally set as 15 seconds. if you are tlaking about teh stabilziation time between each mode: the first mode no gas mode can be skipped for stabilization time, and put 15 seconds between helium and hydrogen
the mass to be monitored is the one you care the most. nromalyl analytst will only watch the internal standard stability. remember the more masses you selected to monitor, the less the life span of your analog mode in the EM becomes.
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