Encyclopedia
Researchers take 1 g for the four samples (marine sediments), pour 20 mL of distilled water with 5mL of pure HCl and researchers take the solutions after filtering to determine the oxides.
29 May 2023
Researchers take 100mL of sample with 100mL of water, after filtering researchers add the solution of bromophenol blue + 50% NH4OH which gives the color blue and researchers add 20mL HCl N/10 + 15mL HCl 1.6 pH so the solution must be yellow.
29 May 2023
After having the yellow color, researchers add the salicylic acid which gives the purple color and researchers heat to 40°C and researchers add EDTA which gives the yellow color which means the presence of iron oxide.
25 May 2023
This is a manual way for analysis the oxydes after boiling at 1000°C.
25 May 2023
Allows the solutions used: HCl, triethanolamine, bromophenol blue and acetic acid.
25 May 2023
After the iron oxide solution has cooled, 50 mL of acetic acid and copper complexonate are added. in boiling, the PAN indicator is added and with 0.03 mole of EDTA the solution must be yellow.
29 May 2023
50mL of triethanolamine N(CH2CH2OH) are added and to go from an acidic medium to a basic medium, NaOH is added until pH=12.5. then the EDTA solution is added to obtain the violet color which signifies the presence of calcium oxide.
29 May 2023
Boil the samples at 1,000 °C for 30 minutes and add 15 mL of BaCl2. Yellow color indicates the presence of sulfate.
29 May 2023
