Ahmed Mahfouz

6 Questions 8 Answers 0 Followers

Questions related from Ahmed Mahfouz

How can I Find the lowest structures of Gold nanoclusters (Au2, Au3, Au4) based on B3LYP/LanL2DZ method?

Dears I need to solve this problem urgently my regards

11 November 2018 2,947 3 View

Which brand of IC systems is better: Dionex, Metrohm or another?

I want to do some water analyses and the results should be in ppb concentration. I want to see which brand of IC is better or another system for analysis?

10 October 2014 3,307 37 View

Does the normal error occur in preparation of VOC standards during auto dilution?

hello friends, in preparation of VOCs standards, there is a normal error occurs, what about auto dilution? I am asking about separated auto dilution not the fixed with instruments, hope to find an...

09 September 2014 4,704 0 View

Metrohm And Dionex are the famous IC systems, but they are too much expensive; does anyone have another Cheaper IC Brand with high quality results?

11 November 2013 479 7 View

Does anyone have experience with DR-5000 and 6000? what about its accuracy?

Dr 6000

07 July 2013 6,340 1 View

Dear friends, How can I prepare Iron 1000 ppm standard solution? I found many methods for that and I am not trust any. plz, who is experience in Iron Analysis and determination by spectro photometer?, I need both of standard preparation and spectrophotometer determination, regards to all

Standard solution

06 June 2013 829 24 View