Summary of Study ST001799
This data is available at the NIH Common Fund's National Metabolomics Data Repository (NMDR) website, the Metabolomics Workbench, https://www.metabolomicsworkbench.org, where it has been assigned Project ID PR001136. The data can be accessed directly via it's Project DOI: 10.21228/M8VQ4D This work is supported by NIH grant, U2C- DK119886.
See: https://www.metabolomicsworkbench.org/about/howtocite.php
This study contains a large results data set and is not available in the mwTab file. It is only available for download via FTP as data file(s) here.
Study ID | ST001799 |
Study Title | Recovery of internal std in SRM-1957 |
Study Type | Untargeted MS anlaysis |
Study Summary | Validation of XLE quantification using standard reference material. High recovery of [13C] labelled chemicals was obtained for important classes of environmental chemicals (PCB, PBDE, PAH, chlorinated pesticides) in NIST SRM-1957. Recoveries ranged from 110±7% for [13C10]mirex to 91 to 105% for congeners of universally [13C] labeled PCBs, PBDEs and chlorinated pesticides, with only [13C12]p,p’-dichlorodiphenyldichloroethylene (p,p’-DDE) having low recovery of 65±6%. Therefore, the simplified extraction procedure provides an efficient recovery of environment chemicals in an organic phase. |
Institute | Emory University |
Department | Medicine/Pulmonary |
Laboratory | Dean Jones |
Last Name | Hu |
First Name | Xin |
Address | Emory University Whitehead building (Rm 225), 615 Michael Street |
xin.hu2@emory.edu | |
Phone | 4047275091 |
Submit Date | 2021-05-05 |
Raw Data Available | Yes |
Raw Data File Type(s) | mzXML |
Analysis Type Detail | GC-MS |
Release Date | 2021-05-20 |
Release Version | 1 |
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Treatment:
Treatment ID: | TR001889 |
Treatment Summary: | 50 µL formic acid (Emprove® Essential DAC, Sigma-Aldrich) was added to 200 µL SRM aliquots and immediately followed by addition of 200 µL hexane – ethyl acetate (2:1 v/v, ≥99% pure, Sigma-Aldrich) containing the internal standards (final concentration: 1 ng/mL). The sample mixture was shaken vigorously on ice using multi-tube vortexer (VWR VX-2500) for 1 h and centrifuged at 1000 g, 4 °C for 10 min. The sample mixture was chilled during entire extraction procedure. The organic supernatant was transferred to a new tube with 25 mg MgSO4 (≥99.99% pure, Sigma-Aldrich) and vortexed vigorously to remove water. After 10 min centrifugation at 1000 g, 80 µL of the final supernatant was spiked with instrumental internal standards (final concentration: 1 ng/mL) for analysis. Two 13C labeled chemicals [13C12]PCB-28 and [13C12]PBB-153 were used as volumetric internal standards added to the final extract, and nine 13C labeled chemicals (99% isotope enrichment for each) were spiked as recovery standards to estimate chemical recovery efficiency by XLE: [13C12]PCB-101, [13C12]PCB-153, [13C12]PCB-180, [13C12]PBDE-47, [13C12]PBDE-99, [13C6]anthracene, [13C10]mirex, [13C6]cis-permethrin, and [13C12]p,p’-DDE. |