Zakaria Rachid

10 Questions 15 Answers 0 Followers

Questions related from Zakaria Rachid

Can i have the HeadSpace and GC parametrs for the determination of DMSO and wich solvents can i use?

can i have the HeadSpace and GC parametrs for the quantification of DMSO and wich solvent can i use? Many thanks

16 January 2024 8,058 2 View

Can EDC react directly with an amine?

Hello. I would like to know if EDC can react directly With a primary amine. Thank you.

27 April 2023 9,409 2 View

Quantification of Menadione nicotinamide bisulphite by HPLC?

HI, Is there any method by HPLC capable to quantify Menadione nicotinamide bisulphite Thank you

26 January 2016 2,678 2 View

Are you familiar with Quantification of diphenhydramine hydrochloride by HPLC?

Dear Members. For the quantification of diphenhydramine hydrochloride (pka = 9). I use column C18 with mobile phase Acetonitrile/Water (50/50) (pH around 5_, I got a pic with a tailing. But when i...

10 June 2015 4,114 8 View

Does rinsing the XBridge BEH C8 column with a mixture of methanol/water (pH = 2) affect its efficiency?

Sincerely yours.

12 March 2015 9,588 2 View

What is the difference between a Xbridge C18 and a Symmetry C18 column?

I would like to know the difference between Xbridge C18 and Symmetry C18 column? Thank you.

11 February 2015 2,558 9 View

What is the role of sodium sulfate in the mobile phase?

Hello, To determine betaine by HPLC RP C18, the MOP is buffer with sodium hexane sulfonate (Pic B6) and sodium sulfate. I would like to know the role of sodium sulfate. Many thanks.

25 November 2014 2,925 4 View

Doses anybody know the LOD and LOQ of Chloramphenicol and Nitrofuran?

Many thanks.

31 July 2014 407 1 View

Could I have the HPLC conditions to quantify the Ostarine?

See above

09 July 2014 2,397 1 View

Does anyone know the HPLC conditions to quantify the Ostarine?

Many Thanks.

08 July 2014 822 0 View