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Imaging reader combines automated confocal and widefield microscopy with multimode microplate reading
MassHunter Retention Index LRI
MassHunter Retention Index LRI
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Hello, For my analysis, i want to use retention index confirmation with NIST MS confirmation. To do that, i injected a alkanes mix C9,C10,C12 C13 C16 C17 C18 C19. I made a batch from this injection and used NIST database to create my compound table with RI from NIST. Normally each alkane should have RI like RI = 100 Nb C From this batch, I used RT calibration and generated my RT calibration file: Nonane 111-84-2 916 12.2312 Decane 124-18-5 1015 15.3985 Dodecane 112-40-3 1214 19.2719833 Tridecane 629-50-5 1313 20.7816333 Hexadecane 544-76-3 1612 24.6508833 Heptadecane 629-78-7 1711 25.7968667 Octadecane 593-45-3 1810 26.8878667 Nonadecane 629-92-5 1910 27.91545 So I don't understand why RI from calibration file are different from theorical RI example Decane theorical 10*100 vs cal value 916 Someone can explain this difference?
I need a method for Free fatty acid analysis of GHEE on GC-FID, thanks in advance
I need a method for Free fatty acid analysis of GHEE on GC-FID, thanks in advance
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community.agilent.com/.../GHEE-SAMPLE-_5F00_-442306.pdf
n-Alkane standard run on GC/FID
n-Alkane standard run on GC/FID
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If I run a standard of n-alkanes ranging from C10-C40 on GC/FID, with each component being the same concentration, should each peak have the same area?
Setting up ASTM D5769 in MSD Chemstation
Setting up ASTM D5769 in MSD Chemstation
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But I have a slightly high bias on gasoline samples. I think my uncalibrated C10 benzenes may be too high and I am wondering if I have that set up properly. Does anyone know how to correctly set up the summing? I am worried that it may be including C10 benzenes that I am already separately calibrated for.