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shifting of mass

http://www.chromforum.org/viewtopic.php?t=15151

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shifting of mass

Posted: Wed Jan 05, 2011 10:38 pm
by KAUSHIKZALA
is it possible, that one compound showing mass in API 2000 DIRECT MASS, BUT NOT SHOWING MASS IN WATERS SINGLE QUDRAPOLE MASS SYSTEM AND WETHER MASS SHIFTS FROM ONE INSTRUMENTS TO OTHER? I.E, M+1 TO M+2 OR ONLY M....................

PLZ REPLY


IS THERE ANY PROCEDURE TO KNOW THAT MY API 2000 SYTEM IS WORKING FINE AND GIVING MASS PERFECT MEANS OK AND RELIABLE?

Re: shifting of mass

Posted: Thu Jan 06, 2011 3:03 am
by Don_Hilton
Have you run a tune or check standard through the instrument. If you run a compund with known masses - they will read either correctly or incorrectly. (Assuming you are using a tuned instrument - my bet is correctly.)
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