Metabolomics Workbench : NIH Data Repository

MB Sample ID: SA034084

Local Sample ID:	18154
Subject ID:	SU000638
Subject Type:	Humans
Subject Species:	Homo sapiens
Taxonomy ID:	9606
Species Group:	Human

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Sample Preparation
Chromatography
Analysis
MS

Sample Preparation:

Sampleprep ID:	SP000645
Sampleprep Summary:	Urine supernatants were diluted with methanol containing spiked labeled internal standards (d3-sarcosine and d3-alanine), and extracted overnight at 4°C, using 1:1 molar ratio of water/chloroform at room temperature, with constant shaking. The aqueous methanolic layer was recovered, dried and azeotroped twice by adding 100 mL dimethylformamide (DMF), mixed and dried using a speedvac for 30 minutes. Following this, 100 mL of DMF and N-methyl-N-tert-butylmethylsilyltrifluoroacetamide (MtBSTFA) + 1% t-butyl-dimethylchlorosilane were added and incubated at 60°C for 1 hr. The samples were resuspended in ethyl acetate and injected into a GC-MS.

Sampleprep ID:

SP000645

Sampleprep Summary:

Urine supernatants were diluted with methanol containing spiked labeled internal standards (d3-sarcosine and d3-alanine), and extracted overnight at 4°C, using 1:1 molar ratio of water/chloroform at room temperature, with constant shaking. The aqueous methanolic layer was recovered, dried and azeotroped twice by adding 100 mL dimethylformamide (DMF), mixed and dried using a speedvac for 30 minutes. Following this, 100 mL of DMF and N-methyl-N-tert-butylmethylsilyltrifluoroacetamide (MtBSTFA) + 1% t-butyl-dimethylchlorosilane were added and incubated at 60°C for 1 hr. The samples were resuspended in ethyl acetate and injected into a GC-MS.