PubMed · 7491249
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P A Hunt, J M Pellock. 1995. Carnitine deficiency.. https://pubmed.ncbi.nlm.nih.gov/7491249/
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A gas chromatographic-negative ion chemical ionization mass spectrometric (GC-NCI-MS) method for the quantitative analysis of clonazepam in human plasma is described. Clonazepam (M(r) = 315) was derivatized by N,O-bis-(trimethylsilyl)trifluoroacetamide with 1% trimethylchlorosilane. A pre-conditioning procedure involving injection of a silyl-8 and ethyl acetate extraction solution from plasma reduces the interaction between clonazepam-TMS and the analytical system. The routine limit of quantification was set to be 0.25 ng/ml with an injection volume of 2 microliters and a sample volume of 1 ml. The signal-to-noise ratio was greater than five. The detection limit for clonazepam can reach 0.1 ng/ml. The isotope clonazepam-d5 was used as the internal standard.
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