Analysis in Urine Samples
An enzymatic Method is widely used for the determinations of Glycolic Acid in various products, but it suffers from instability and very high cost of the enzyme (Glycolate Oxidase). The LCMS analysis presented here is rapid, simple, selective, and suitable for routine analyses of urine samples.
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Glycolic Acid 75.0088 [M-H]– m/z in urine sample
Column: Cogent Diamond Hydride™, 4µm, 100Å
Catalog No.: 70000-15P-2
Dimensions: 2.1 x 150mm
—A: DI Water / 10 mM Ammonium Formate
—B: 95% Acetonitrile / 5% DI Water / 10 mM Ammonium Formate (v/v)
Post Time: 3 minutes
Flow rate: 0.4mL / minute
Detection: ESI – NEG – Agilent 6210 MSD TOF Mass Spectrometer
Sample Preparation: Urine sample was spiked with stock solution of Glycolic Acid. The solution was filtered through a disposable 0.45µm Syringe Filter (MicroSolv Tech Corp.). The sample for injection was diluted 1:100 with 50:50 Solvent A / Solvent B mixture for a final concentration of 0.1mg / mL.
t0: 0.9 minutes
Note: Glycolic Acid is widely used in adhesives, metal cleaning, dairy cleaning, water-well cleaning, electroplating, dyeing, detergents and cosmetic products. It is also the most commonly used hydrophilic teeth whitening agent.
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