==== Acylcarnitine and Conjugated Acylcarnitine Mass Spectral Library (HCD) of Human Urine ====


This library was created from the HCD mass spectral data of 108 LC-MS runs of six pooled NIST standard reference materials (SRM). It contains 5,328 consensus mass spectra derived from 586 identified acylcarnitines with 157 different masses as well as 125 newly discovered conjugated acylcarnitines with 85 different masses. All spectra were produced at multiple collisional energy settings (HCD: 10, 15, 20, 25, 30, 40, 50, 60 and 80).

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Numbers of different masses, ions, and spectra of acylcarnitines and conjugated acylcarnitines in the library.
^Metabolites ^Masses ^Ions ^Spectra ^
|Carnitine	|1	|1	|9  |
|Acylcarnitines	|157	|586	|4,332  |
|Conjugated acylcarnitines |85	|125	|987 |
|Total	|243	|712	|5,328  |

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Links to download the library and the software (optionally).

^  ^File ^Size ^Link to download ^
|1 |**ac_cac_lib2020_nistms.tar.gz** - Acylcarnitine and conjugated acylcarnitine mass spectral library in NIST MS Search format. See **//Notes//** below for installation instruction . |~5.5MB |[[https://chemdata.nist.gov/download/peptide_library/libraries/acylcarnitine/ac_cac_lib2020_nistms.tar.gz|Download]] |
|2 |**ac_cac_lib2020_msp.tar.gz** - Acylcarnitine and conjugated acylcarnitine mass spectra in MSP (text) format. |~1.2MB |[[https://chemdata.nist.gov/download/peptide_library/libraries/acylcarnitine/ac_cac_lib2020_msp.tar.gz|Download]] |
|3 |**md5_checklist.chk** - MD5 hash file. |1KB |[[https://chemdata.nist.gov/download/peptide_library/libraries/acylcarnitine/md5_checklist.chk|Download]] |


** NOTES** 


You will need **NIST MS Search software v.2.3**  to search the Acylcarnitine library. The software can be download from here: {{:chemdata:nist17:nist17demo.zip|Download installation program}}. Download archive and unzip installation file. Run NIST17Demo.exe to install the search program. Copy the unzipped library to the NIST MS Search folder.


Release Date: April 23, 2020



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