Quantification ofN‐acetyl‐l‐aspartic acid in urine by isotope dilution gas chromatography‐mass spectrometry
- 6 December 1990
- journal article
- Published by Wiley in Journal of Inherited Metabolic Disease
- Vol. 15 (1) , 97-104
- https://doi.org/10.1007/bf01800351
Abstract
A method for quantification ofN-acetyl-l-aspartic acid by isotope dilution gas chromatography-mass spectrometry using15 N-[2H3]acetyl-l-aspartic acid is described. The method is sufficiently sensitive to be used with solvent extraction techniques commonly employed for urinary organic acid analysis. The mean concentration ofN-acetyl-l-aspartic acid in 80 normal and abnormal control urine specimens was 19.7±10.8 mg/g creatinine (12.7±7.8 mmol/mol creatinine). Seven patients, ages 9 months to 7 years, with Canavan-van Bogaert syndrome had urinaryN-acetyl-l-aspartic acid levels from 606 to 4760 mg/g creatinine. The method can also be used with cerebrospinal fluid, in which the concentration ofN-acetyl-l-aspartic acid is about one-tenth of that in urine.Keywords
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