Shea Dreaden

3 Questions 1 Answers 0 Followers

Questions related from Shea Dreaden

How do I know if I have the HPLC Calculations and injection volumes right?

I have a method that asks me to take 300 mg of Active A and put it into 100 ml of solvent as stock solution A. From stock solution A, I take 10 ml of that solution and dilute again to working...

11 November 2018 3,272 0 View

I'm trying to quantify an active on HPLC, but I'm getting a lower result than I should. What should I check?

I have run a 5 cal curve. 21.5, 43, 86,129, and 172 mg/100 ml of active in methanol. My sample should read 29-30 mg/100 ml. I get about 3 mg/100 ml every time. What's wrong? I'm afraid I'm...

04 April 2018 7,578 11 View

Is there a way to test for an imidazoline ring closure ratio without using an FTIR?

I don't have an FTIR, so I was wondering if there was a titration or alternative to checking for the ration of open rings to closed rings.

06 February 2018 8,857 1 View