====== Preliminary Acyl Carnitine Library ======

An experimental Carnitine Library, extracted from runs on NIST Urine Standard Reference Materials, is provided – with each of 5 collision energies represented as a single library (NCE=20, 25, 30, 40 and 50). This is based on work presented at the ASMS 2017 Conference by Xinjian Yan “Differentiation of Acylcarnitine Isomers Based on LC-MS/MS Mass Spectra and Development of an Accurate Mass Spectral Library”.

Its use requires a copy of the NIST MS search program (available on the site). Searching the main NIST 17 library with the ‘MS/MS Hybrid Search’ will assist in structure elucidation.


**The urine (pooled) reference materials used were:**
|3667      | Normal human urine |
|3671-1    | Normal human urine |
|3671-2    | Nonsmokers, exposure to “secondhand” smoke |
|3671-3    | Smokers at least one pack of cigarettes per day |
|3672      | Similar to 3671-3 |
|3673      | Normal human urine |

^ Library ^  Instrument ^ NCE  ^ Download Link ^
| <color green/lightgray> Carnitine </color> |  HCD |  20 | {{:chemdata:nist17:ac_hcd20.zip|ac_hcd20.zip}}|
| ::: |  HCD |  25 | {{:chemdata:nist17:ac_hcd25.zip|ac_hcd25.zip}}|
| ::: |  HCD |  30 | {{:chemdata:nist17:ac_hcd30.zip|ac_hcd30.zip}}|
| ::: |  HCD |  40 | {{:chemdata:nist17:ac_hcd40.zip|ac_hcd40.zip}}|
| ::: |  HCD |  50 | {{:chemdata:nist17:ac_hcd50.zip|ac_hcd50.zip}}|