Rafina Naqiyya Qatrunnada

3 Questions 1 Answers 0 Followers

Questions related from Rafina Naqiyya Qatrunnada

How to calculate 10 mol% catalyst?

i will do synthesis of coumarin using 10 mmol of salicylaldehyde and 10 mmol diethyl malonate using 10 mol% of catalyst L-proline. could anyone help me to count how much catalyst (in mg) should i use?

16 January 2025 4,614 1 View

The absorbance values of my sample are almost same, what was that mean?

I did a dpph method and make a variety of concentration (400, 200, 100, 50, 25 ppm). I have done it by making 1000 ppm first and diluted them, I already did this 4 times but the results are always...

29 November 2024 9,793 4 View

I want to do antioxidant test by dpph method for 2 samples and ascorbic acid as positive control, can I do it all at once?

I don't use microplate, so I will make a dilution by volumetric flask. I also will do a triplo test, so can I do it all at once? like makin 3 times dilution of ascorbic acid and my 2 samples,...

19 November 2024 3,629 8 View