| 摘要 |
<p>The present invention relates to an internal standard for use in mass spectometry to determine the concentration of a test sphingolipid, the internal standard comprising the same oligosaccharyl chain and long chain base sphingosine as the test sphingolipid and having an acyl group of different mass from the test sphingolipid but providing a sphingolipid of the same chemical nature as the test sphingolipid, and methods for the preparation and use thereof.</p> |
