Nhu Nguyen

3 Questions 1 Answers 0 Followers

Questions related from Nhu Nguyen

How to perform Spike Recovery in HLPC Method (Analytical Chemistry)?

Dear alls, my question in in the project of extraction of caffein from fresh leaves. Recovery studies were also carried out to verify the precision and accuracy. There are five calibration...

27 January 2022 7,051 4 View

Calculate the amount of caffeine in the fresh plant sample?

Dear, 5g fresh leaves A were placed in 70% aqueous methanol (40 mL) at boiling temperature in for 15 min. The mixture was cooled to room temperature and homogenized for 15 minutes using...

19 January 2022 1,914 1 View

At the retention time from 7.3 minutes to 7.5 minutes, how do I make sure that only caffein appears and there are not more different chemicals?

Dear, 5g fresh leaves A were placed in 70% aqueous methanol (40 mL) at boiling temperature in for 15 min. The mixture was cooled to room temperature and homogenized for 15 minutes using...

19 January 2022 1,866 0 View