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Boardwalk :: Forum List Forum Category Mass Spetrometry Troubleshooting
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 Ghost peak - 2005/11/28 17:52 a compound with m/z 288 in the blank (95% acetonitrile with 0.05 % formic acid)detected when performing L/MS. What is this peak and how can I get rid of it?
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ahold
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 Re:Ghost peak - 2006/05/28 23:13 I assume this peak appears in positive ionisation mode and has a poor UV response? If you are injecting through vial caps, this might be related to the type used. Try to clean the system by injecting neat DMSO (provided your column will tolerate this) a number of times, this will clean your injector and wash off the substance. Then try some blank injections and make sure the peak is not coming from the system. If you inject again through the caps you can tell if it comes from them.
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Boardwalk :: Forum List Forum Category Mass Spetrometry Troubleshooting

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