Metabolomics Workbench : NIH Data Repository

MB Sample ID: SA087811

Local Sample ID:	N_20
Subject ID:	SU001299
Subject Type:	Human
Subject Species:	Homo sapiens
Taxonomy ID:	9606
Gender:	Male and female

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Sample Preparation:

Sampleprep ID:	SP001307
Sampleprep Summary:	The frozen heparin anti-coagulated plasma samples were thawed on ice and 100 μl of each sample was transferred to a 1.5ml sterile micro-centrifugen tube. After the addition of 300 μl of methanol (containing internal standard L-2-chlorophenylalanine 1 μg/ml), each sample was vortexed for 30 s, sonicated for 10 min in ice-water bath, and incubated for 1 h at -20°C to precipitate proteins. Then each sample was centrifuged at 12000 rpm for 15 min at 4°C. The resulting supernatants were transferred to LC-MS vials and stored at -80°C until the UPLC-QE-MS analysis. Each quality control sample was also prepared by mixing an equal aliquot of the supernatants from each sample. The treatment methods were the same as above.

Sampleprep ID:

SP001307

Sampleprep Summary:

The frozen heparin anti-coagulated plasma samples were thawed on ice and 100 μl of each sample was transferred to a 1.5ml sterile micro-centrifugen tube. After the addition of 300 μl of methanol (containing internal standard L-2-chlorophenylalanine 1 μg/ml), each sample was vortexed for 30 s, sonicated for 10 min in ice-water bath, and incubated for 1 h at -20°C to precipitate proteins. Then each sample was centrifuged at 12000 rpm for 15 min at 4°C. The resulting supernatants were transferred to LC-MS vials and stored at -80°C until the UPLC-QE-MS analysis. Each quality control sample was also prepared by mixing an equal aliquot of the supernatants from each sample. The treatment methods were the same as above.