A study was made of the accuracy and precision of glucosinolate determination by gas liquid chromatography (GLC) after transformation of the glucosinolates to desulfoglucosinolates and silylation. The condition of the GLC column and the cleanness of the injection port were found to be crucial for quantitative determination of the glucosinolate silyl ethers. The relative stabilities of glucosinolate silyl ethers in pyridine solution remained constant over a period of weeks in air at ambient temperature.
Hase, A., Johansson, M-L., & Viljava, T-R. (1988). Sources of error in the analysis of glucosinolates by gas liquid chromatography. Journal of the American Oil Chemists' Society, 65(4), 647-651. https://doi.org/10.1007/BF02540695