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Auto tune fail due to mass 118amu missing

Question asked by yitnazewdie on Aug 15, 2019
Latest reply on Aug 21, 2019 by yitnazewdie

Hi

6420 QQQ  auto tune was failed.It was due to 118amu missing.

We were changing ESL L tuning mix,result was the same.We clean ion source & capilary cap,the result was the same.

The calibrant flow & spray was OK.

What will be the probable cause & solution for this problem?

For further information look on attached screen shot.

 

Yitna Zewdie

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