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- Posts: 7
- Joined: Fri Apr 12, 2019 6:47 am
performing alkaline hydrolysis on urine for THCA analysis with 25% ammonia solution before LCMS-analysis.
Want to standardise my source of negative urine for calibrators and find commersial Control material. However many are preserved with sodiumazide, around 0,1-0,25%.
Does any one have an idea what would happen with the sodiumazide when doing that hydrolysis of the commersial urines?
And how wound it later react with the formic acid i use in my mobile phase.
Best regards
Pär