i did icp analysis to a prepared chitosan hydrogel loaded with calcium and phosphorus ions the concentration was as following
Chitosan powder (0·25g) was dissolved in acetic acid solution (1%, 25ml), then stirred at 80°C for 2 h and finally left to cool to room temperature. Following this, the solution was loaded with inorganic ions by mixing chitosan solution (960ml), sodium hydrogen phosphate solution (15ml, 0·1M) and calcium chloride solution (25ml, 0·1M)
the ICP results shows thes number of calcium ions 100 mg/L and phosphorus 30 mg/L
how to make sure that the concentration of ions is right ?
If the concentrations of the sodium phosphate solution and calcium chloride solution exactly 0.1 M, then the concentrations of phosphorus and calcium, respectively, are also 0.1 M, because for each mole of these salts there is 1 mole of the element, phosphorus or calcium. Knowing the atomic masses of phosphorus and calcium, convert molar concentrations of 0.1M into mass/volume concentrations, e.g. in g/L. Then calculate how much phosphorus was in 15mL of 0.1M phosphate solution and how much calcium was in 25mL of 0.1M chloride solution. These amounts of P and Ca eventually amounted to 1L (15mL + 25mL + 960mL = 1000mL = 1L). By the way, it is better to do this volume mixing using a volumetric flask. So the amounts of P and Ca in a 1L solution are also the concentrations of these elements, expressed in g/L or mg/L.
And then compare these concentrations with the concentrations determined by the measurements.
ZJ
Zbigniew Jońca could you explain in more details, please
if you could do the calculations as i didn't get them
- Badges
- Science topic
- Similar topics
- Chemistry, Organic
- Organic