The composite is powder. I want to know the elemental percentage of each element. Please help me.
Thank you in advance.
The mixture of two acids (nitric:hydrochloric acids: 1:3) is called Aqua regia. You will put a fixed amount of your sample into Aqua regia (please take fixed volume) and heat at temperature of 90 to 100 C for 3-5 h. The resultant will be diluted with distilled water and please use syringe filter to separate the metal-dissolved solution and carbon support. The obtained carbon support will be checked with SEM/TEM for further confirmation of undissolved-metals in carbon support.
In my opinion the two parallel test are required (the order is not key factor).
First test includes oxidation melting of the sample in NaNO3/NaOH mixture (to transfer C into CO3(2-) ions). Here you analyze carbon content. Second - dissolution of the sample in HCl/HNO3 mixture. In this probe you analyze Au and Pd metals.
Good luck
Can you please tell me the actual procedure for the second step?
What is the actual ratio of two acids?
The mixture of two acids (nitric:hydrochloric acids: 1:3) is called Aqua regia. You will put a fixed amount of your sample into Aqua regia (please take fixed volume) and heat at temperature of 90 to 100 C for 3-5 h. The resultant will be diluted with distilled water and please use syringe filter to separate the metal-dissolved solution and carbon support. The obtained carbon support will be checked with SEM/TEM for further confirmation of undissolved-metals in carbon support.
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