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What is the m/z of leucine enkephalin and Glu-fibrinopeptide B used as lockmass on Xevo G2-XS or SYNAPT G2-Si? - WKB27224

Article number: 27224

ENVIRONMENT

  • MassLynx
  • UNIFI
  • LCT
  • LCT Premier
  • LCT Premier XE
  • Q-Tof Premier
  • Q-Tof micro
  • Q-Tof 2
  • Q-Tof
  • Q-Tof Ultima API
  • Q-Tof Ultima Global
  • Synapt HDMS
  • SYNAPT G2
  • SYNAPT G2 MS/HDMS
  • SYNAPT G2-S MS/HDMS
  • SYNAPT G2-Si MS/HDMS
  • SYNAPT G2-S
  • SYNAPT G2-Si
  • Vion IMS QTof
  • Xevo QTof
  • Xevo Tof
  • Xevo G2 QTof
  • Xevo G2 Tof
  • Xevo G2-S
  • Xevo G2-S QTof
  • Xevo G2-S Tof
  • Xevo G2-XS
  • Xevo G2-XS QTof
  • Xevo G2-XS Tof

ANSWER

In Positive ion mode, as calculated by and used in MassLynx and MassLynx mass reference files, plus associated MassLynx app managers:

  • Leucine enkephalin C28H37N5O7 is M/1 = 556.2771 m/z
  • Glu-fibrinopeptide B is Double Charged (M+2H)/2 = 785.8426 Da; Single Charge (M+H)/1= 1570.6774 Da

 

In Positive ion mode in UNIFI and UNIFI mass reference files plus other third-party MS S/W:

  • Leucine enkephalin is (M+H-1e)/1= 556.27658 Da
  • Glu-fibrinopeptide B C66H95N19O26 is (M+2H-2e)/2 = 785.84206 Da; Single Charge (M+H-1e)/1 = 1570.67684 Da

 

In Negative ion mode in MassLynx:

  • Leucine enkephalin C28H37N5O7 is (M-H)/1 = 554.2615
  • Glu-fibrinopeptide B C66H95N19O26 is (M-2H)/2 = 783.8270; Singly charged (M-H)/1 = 1568.6617

 

In Negative ion in UNIFI:

  • Leucine enkephalin C28H37N5O7 is (M-H+1e)/1 = 554.26202 Da 
  • Glu-fibrinopeptide B C66H95N19O26 is (M-2H+2e)/2 = 783.82751 Da; Singly charged (M-H+1e)/1 = 1568.66229

 

ADDITIONAL INFORMATION

UNIFI takes into consideration the loss (positive ion mode) or addition (negative ion mode) of the electron.

The part numbers for leucine enkephalin and Glu-fibrinopeptide B can be found in this article.

LAC32, LAC32C07, LAC32C08, LAC32C09, LAC32C1_4, LAC32C10, LAC32C11, LAC32C12, LAC32C13, LAC32C15, LAC32C16, LAC32C5_6, LACE, LACE32C14, LCTPREMIER, LCTPREMXE, MLYNX, MLYNXV41, QTOF2, QTOFAPIUS, QTOFGLBL, QTOFMICRO, QTOF-PREM, QTOFULTAPI, SUPMM, SUPUNIFI, SYNAPT, SYNAPTMS, SYNG2HD, SYNG2HDMAL, SYNG2MS, SYNG2MSMAL, SYNG2SHD, SYNG2SHDML, SYNG2SIHD, SYNG2SIMS, SYNG2SMS, SYNG2SMSML, UNIFISVR, UNIFISW18, UNIFOPT, UNIFQLIC, UNIFSW17, UNIFSW18, UNIFSW19, UNIFWGLIC, UNIFWKLIC, XEVOG2QTOF, XEVOG2SQTF, XEVOG2STOF, XEVOG2TOF, XEVOG2XSTF, XEVOQTOF

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